To invent something, as this article uses the term, is to reach conception: a specific, settled idea of a new and useful process, machine, manufacture or composition of matter. A goal does not meet that standard, and neither does a research plan. Methods published by NASA and the National Science Foundation carry an idea from a stated problem to a concept that can be tested, and USPTO rules decide whether the result can later be patented.
What US law counts as an invention
Under 35 U.S.C. 100(a), "invention" means invention or discovery, and section 100 supplies no test for what is inventive. Section 101 limits patents to four categories, process, machine, manufacture and composition of matter, and to any new and useful improvement of one of them. Courts have added exceptions for abstract ideas and for natural laws and phenomena, as the USPTO's Manual of Patent Examining Procedure (MPEP 2106) records.
Section 100(f) names who invents. An inventor is the individual who invented or discovered the subject matter, or in a joint invention the individuals together. A patent attaches to a person's invention.
Conception: the point at which an idea becomes an invention
Sections 100 and 101 never use the word conception. It comes from court decisions that the MPEP and the USPTO's 2025 inventorship guidance report. MPEP 2138.04 defines it as the complete performance of the mental part of the inventive act and requires a definite and permanent idea of the complete and operable invention. An inventor need not know that the invention will work for the idea to be complete.
Revised Inventorship Guidance for AI-Assisted Inventions, 90 FR 54636 (November 28, 2025), the USPTO's current notice, phrases the standard this way: conception is complete when the inventor has a specific, settled idea, a particular solution to the problem at hand, and a general goal or research plan falls short. Analysis turns on whether the inventor can describe the invention with particularity.
Reduction to practice travels with conception. It may be actual, when an embodiment is built or a process performed and operates for its intended purpose, or constructive, which the MPEP says occurs when a patent application on the claimed invention is filed.
Pfaff v. Wells Electronics, Inc., 525 U.S. 55 (1998), adds that the Patent Act has no express requirement of reduction to practice before patenting and that "invention" refers primarily to the inventor's conception, not to a physical embodiment. A working prototype is therefore no legal prerequisite. Pfaff's second requirement, that the invention be ready for patenting, matters once a concept is shown to anyone. Reduction to practice satisfies it, and so do drawings or descriptions specific enough for a skilled person to practice the invention.
MPEP 2138.04 and 2138.05 carry an editor note that they have limited applicability to applications examined under the first-inventor-to-file rules of the America Invents Act. They remain the manual's statement of what the terms mean.
Terms in one place
|
Term |
What the source says |
Source |
|---|---|---|
|
Conception |
A definite and permanent idea of the complete and operable invention |
MPEP 2138.04 |
|
Constructive reduction to practice |
Occurs when a patent application on the claimed invention is filed |
MPEP 2138.04 |
|
Grace period |
A disclosure made one year or less before the effective filing date is not prior art if it comes from the inventor |
35 U.S.C. 102(b)(1) |
Start from a need, and keep it apart from the answer
NASA's Systems Engineering Handbook (NASA/SP-2016-6105 Rev2) defines needs as answers to the question of what problem is being solved. A need is a single statement that drives everything else; it relates to the problem the system must solve without being the solution. Written for large flight projects, the handbook lends a student project its logic and none of its scale.
NASA's Engineering Design Process worksheet begins with the same step, and NASA Glenn's design challenge guide has participants state the problem in their own words, using a fill-in form that opens "How can I design a" and closes with the function the design must perform.
As this article reads the handbook, naming a device in the statement skips the step it describes. Naming a failure and a measurable consequence leaves the solution open, and conception cannot happen until a solution is chosen.
Criteria and constraints come before ideas
The worksheet separates two lists at its second step. Criteria are the requirements a solution must meet. Constraints limit the design, and the worksheet names cost and time among them. Glenn's guide has participants revisit both during every design iteration so that no limitation is overlooked.
Precision increases in the Systems Engineering Handbook, which turns stakeholder expectations into quantitative, measurable technical requirements written as "shall" statements. It also holds that selection criteria should be objective and measurable and should permit differentiating among options. A criterion that can't be measured can't be tested later, so the wording chosen here fixes what any test is able to show.
Concepts, alternatives and ranking
Brainstorming possible solutions is NASA's third step: describe and sketch approaches to the problem. In Glenn's guide each student sketches individual ideas while the group discusses ways to solve it, and the handbook observes that brainstorming with people who know the context and the decision can provide a good list of candidates.
Ranking follows. According to the handbook, alternatives are ranked against the selection criteria set earlier. Glenn's guide reproduces the Next Generation Science Standards expectation MS-ETS1-2, which calls for evaluating competing design solutions through a systematic process that shows how well each meets the criteria and constraints. A dated record of several candidates and the reason for choosing one can document that choice.
Making the concept testable
In this article, a testable concept means a concept written with measurable criteria, so that a defined experiment can show whether it meets them. Public guidance describes such experiments at several scales.
NASA's Technology Readiness Levels place early work on a scale, and TRL 2 is the stage NASA calls very speculative. At TRL 3 active research and design begin; analytical and laboratory studies are generally required and a proof-of-concept model is often built. At TRL 4 multiple component pieces are tested with one another. The scale describes NASA technologies; a student concept sits on it by analogy only.
NASA's education worksheet closes the loop in its fifth through seventh steps, which have participants build a prototype and then test and refine it. Glenn's guide has the group run repeated trials in a controlled environment while taking measurements and observations.
NSF tests another thing: market hypotheses. Its I-Corps program centers on customer discovery, in which teams interview potential customers, and it expects a clear hypothesis about the problem in the market and the value the innovation could offer. The program is a grant program for funded research teams, so its expectation of at least 100 interviews applies to them, not to students at large.
The USPTO manual's standard for an actual reduction to practice supplies the legal meaning of a successful test. An invention must have been sufficiently tested to show that it will work for its intended purpose, though it need not reach a commercially satisfactory stage of development. That passage comes from priority-contest practice under the pre-AIA system.
Recording the work as it happens
University technology transfer offices publish the practical rules. The University of Alabama in Huntsville's Office of Technology Commercialization says a well-maintained laboratory notebook can work as adequate documentation for intellectual property, that each page should carry the author's signature and date plus a witness signature, and that delay between the two signatures weakens credibility. Its list of what an entry contains:
- the title of the experiment;
- the hypothesis or goals;
- background information;
- procedures, calculations, reagents and equipment used;
- observations and conclusions.
At the University of Texas at Arlington the witness must understand the technology without being a future co-inventor. Its procedure also says the witness's date fixes the date of invention, a view that belongs to the older first-to-invent system. Under the America Invents Act, 35 U.S.C. 102(a)(1) measures prior art against the effective filing date of the claimed invention, so notebook dates work as evidence of who conceived what and when, not as a priority date.
Invention disclosure forms do related work. Michigan State University describes its Innovation Disclosure Form as a confidential, written, dated record of an invention's creation and asks for it before any publication, giving two reasons: errors that could block a patent become irreversible, and students and postdocs who leave are hard to reach for signatures. Caltech's disclosure instructions ask for the problem the invention solves and the work of others that failed to solve it, and its form asks whether the invention has been published or made available to the public.
Precursal is an AI platform for ideas and patents. Its home page says it helps users explore ideas, uncover white space, research prior art, document human conception and prepare stronger materials for patent counsel, and under the heading "Walk into counsel better prepared" it lists an inventor notebook and an invention disclosure among the items a user can bring. The same page says Precursal does not determine or guarantee novelty or patentability.
Checking what already exists
Public availability in any form that section 102 recognizes generally bars a patent, according to the USPTO's patent process overview. Before applying, the overview says, an applicant should search public records for similar inventions.
USPTO's multi-step strategy page (last updated May 7, 2024) begins with brainstorming terms that describe the invention, then runs a keyword query in Patent Public Search, broad on the main concept and narrowed by adding features, and widens through Cooperative Patent Classification codes. It advises planning for hours of work, since the time depends on the invention's complexity, and asks that the databases used, the timing of each query and the documents retrieved be recorded. As of October 2026 the USPTO states that Patent Public Search will require a USPTO account sign-in beginning November 7, 2026.
Under MPEP 1120, applications are published promptly after 18 months from the earliest filing date, and provisional applications are not published. A search therefore cannot show applications still inside that window.
Libraries offer a human route. The USPTO's Patent and Trademark Resource Center program is a nationwide network of academic, public and state libraries whose representatives are trained to help inventors find information and can demonstrate patent search tools, though they cannot give legal advice. The National Inventors Hall of Fame requires a literature or patent search with each Collegiate Inventors Competition entry and expects a good-faith effort to distinguish the invention from similar prior art.
Who counts as an inventor on a team
Conception decides inventorship. MPEP 2109 puts the threshold question as who conceived the invention, states that a person who does not contribute to conception is no inventor, and calls reduction to practice irrelevant to who qualifies. Suggesting a result without the means of reaching it makes no one a coinventor, and a skilled mechanic carrying out the details of another's plan is not one either.
Team efforts are the hard case, the manual notes, because each member contributed something and only some contributed to conception. Section 116 sets the other limit. Joint inventors need not work physically together or contribute equally, and a contribution to every claim isn't required. A written record of each person's contribution, dated when the work happens, is the natural evidence for that question.
Artificial intelligence falls under the same rule. In Thaler v. Vidal, 43 F.4th 1207 (Fed. Cir. 2022), the Federal Circuit held that the Patent Act requires an inventor to be a natural person, and it left open whether inventions made by humans with AI assistance are eligible for protection. The USPTO's 2025 guidance fills that gap: it rescinds the February 13, 2024 guidance in its entirety, applies one legal standard to all inventions whether or not AI systems were used, and calls AI systems instruments of human inventors, able to provide services and generate ideas while remaining tools. A person working with AI is asked whether that person conceived the invention under the traditional standard.
Ownership when a university is involved
Ownership is separate from inventorship. In Stanford v. Roche, 563 U.S. 776 (2011), the Supreme Court wrote that since 1790 patent law has operated on the premise that rights in an invention belong to the inventor, and it held that the Bayh-Dole Act does not automatically vest title to federally funded inventions in federal contractors.
Each school sets its own rules for students, and a student should read the school's policy before using campus resources. Yale's student patent policy deems a student the owner unless the invention arose under sponsored research or a third-party agreement, within faculty-supervised thesis work, through university employment or contract work, or with significant use of university resources; any invention the university may own must be disclosed. The University of Illinois Chicago starts from a different default: it owns intellectual property developed with its facilities, equipment or funds, by students as by anyone else, and intellectual property a student creates outside a course for which an exception has been granted must be reported to its Office of Technology Management.
Public disclosure before anything is filed
Timing has its own USPTO tool, the provisional application. Filed under 35 U.S.C. 111(b), it needs no claim, and its pendency lasts 12 months; the benefit can be restored by petition within 14 months. The USPTO page says that, given the one-year grace period, a provisional can be filed up to 12 months after an inventor's public disclosure, and that a disclosure more than one year before the filing date precludes patenting in the United States. Michigan State advises submitting its form before publishing, and Caltech's form says a provisional should be filed before the publication date of a submitted manuscript.
This article describes rules and is not legal advice; whether a particular showing or posting starts the clock is a question for a registered patent attorney or agent.
Under 35 U.S.C. 102(a)(1), an invention is not patentable if, before the effective filing date, it was patented, described in a printed publication, in public use, on sale or otherwise available to the public. Section 102(b)(1) adds a grace period: a disclosure made one year or less before the effective filing date is not prior art when the inventor or a joint inventor made it, or someone who obtained the subject matter from them. Because the statute lists categories and names no particular activity, a class presentation or a crowdfunding page has to be judged against those categories.
Accessibility decides the printed-publication question, as the USPTO manual shows. A doctoral thesis indexed and shelved in a library is accessible enough to count, while a thesis available only to the three members of a graduate committee was not treated as published. Sales and offers follow Pfaff's two-part test: a commercial sale or offer, not primarily for experimental purposes, of an invention that was ready for patenting. MPEP 2152 gives "on sale" in the current statute the same meaning it had before the America Invents Act.
Help for inventors without a large budget
Law School Clinic Certification Program participants number over 70 participating clinics that provide legal services pro bono to inventors as well as entrepreneurs and small businesses. Each school sets its own criteria for accepting clients, and the USPTO's FAQ says participating schools may be able to evaluate an idea and analyze obstacles to obtaining a patent.
Eligible inventors and small business owners are matched with free legal assistance through the Patent Pro Bono Program. Its common requirements are gross household income under three times the federal poverty level guidelines, with some regional programs applying different criteria, and a demonstrated understanding of the patent system, shown by a provisional application on file or a completed certificate training course. The page was last updated in September 2024, so its coverage map should be checked before anyone relies on it. The Patent and Trademark Resource Centers described above add search training in libraries, with services that vary by location.
Sources imply an order: the need first, apart from the solution; then measurable criteria and ranked alternatives; then a test recorded in a dated notebook; then a search of public records; and public showings only once timing has been settled with a provisional filing or a practitioner's advice.