Conception of Invention

Conception is the mental part of the inventive act — it is the formation in the mind of the inventor of a definite and permanent idea of the complete and operative invention as it is to be applied in practice. The standard, as articulated in Coleman v. Dines (Fed. Cir. 1988): 'Conception is the formation in the mind of the inventor of a definite and permanent idea of the complete and operative invention, as it is hereafter to be applied in practice.' Key elements: (1) DEFINITE — the idea must be specific and clear enough to enable a person of ordinary skill in the art to reduce it to practice without undue experimentation; (2) PERMANENT — the idea must be fixed in the inventor's mind, not a vague or fleeting thought; (3) COMPLETE — the inventor must have a complete idea of the full invention, including all elements of the claimed invention; (4) OPERATIVE — the invention must be conceived as something that works (not just a general concept). Conception is purely a mental act — it is completed when the inventor has the complete idea, before any physical embodiment is made.

Under the AIA (effective March 16, 2013), the U.S. moved to a first-inventor-to-file system — the patent goes to the first inventor to file a patent application, not the first to conceive or reduce to practice. The effective filing date controls. REMAINING RELEVANCE OF CONCEPTION: (1) INVENTORSHIP — conception is still required to establish who is a true inventor; all persons who conceived the claimed invention must be listed (and only they); a person who merely reduced to practice without contributing to conception is not an inventor; (2) DERIVATION PROCEEDINGS — under AIA § 135, a later filer can challenge an earlier filer's patent by showing the earlier filer derived the invention from the later filer (i.e., the earlier filer did not independently conceive the invention — they copied it); proving derivation requires showing that the petitioner conceived the invention first and communicated it to the respondent; (3) PRE-AIA applications — interference proceedings for applications with pre-March 16, 2013 effective filing dates still require conception and reduction-to-practice analysis.

Conception cannot be established by an inventor's uncorroborated testimony alone. Courts require independent corroboration of conception — contemporaneous evidence that was not created after-the-fact by the inventor or solely at the inventor's direction. FORMS OF CORROBORATION: (1) CONTEMPORANEOUS LAB NOTEBOOKS — dated, witnessed entries describing the conception; the witness must understand and sign the notebook at or near the time of the entry; (2) ENGINEERING DRAWINGS OR SCHEMATICS — dated technical drawings showing the complete concept; (3) CORRESPONDENCE — emails, letters, or messages describing the invention to third parties at or near the time of conception; (4) THIRD-PARTY WITNESSES — colleagues, supervisors, or others who can testify they were told about the invention at the time of conception; (5) INTERNAL DISCLOSURE RECORDS — invention disclosure forms submitted to a company's IP department. CORROBORATION RULE: the 'rule of reason' applies — all circumstances surrounding conception are examined to determine whether the corroborating evidence persuades an unbiased observer that the inventor did in fact conceive the invention on the claimed date.

CONCEPTION: the mental formulation of the complete idea of the invention — the 'Eureka' moment. The invention exists only in the inventor's mind. REDUCTION TO PRACTICE: the physical embodiment or legal formalization of the conception: (1) ACTUAL REDUCTION TO PRACTICE — physically making and testing the invention to confirm it works for its intended purpose (testing must be sufficient to demonstrate that the invention works as claimed); (2) CONSTRUCTIVE REDUCTION TO PRACTICE — filing a patent application that adequately describes the invention (the filing date is treated as the date of reduction to practice). KEY DISTINCTION: an inventor can conceive an invention without reducing it to practice — conception requires only a complete mental idea, not a working model. After conception, the inventor must exercise reasonable DILIGENCE (continuous effort to reduce to practice) to prevent a later conceiver who diligently reduces to practice first from prevailing in a pre-AIA priority dispute.

Conception is the defining act of inventorship. A person is a TRUE INVENTOR of a patent claim if and only if they contributed to the CONCEPTION of the claimed invention. This has several important implications: (1) PEOPLE WHO ARE NOT INVENTORS — someone who merely builds or tests the invention based on the inventor's complete conception is not an inventor (even if they did all the 'real work' physically); a supervisor who assigned the project but did not contribute to the conception is not an inventor; a funder or employer who financed the research is not an inventor; (2) JOINT INVENTORS — two or more people who each contribute to the conception of the claimed invention are joint inventors, even if they worked independently or did not work at the same time (35 U.S.C. § 116); (3) INVENTORSHIP CORRECTION — incorrectly listed inventors can be corrected (37 C.F.R. § 1.48); failure to name all inventors (misjoinder/non-joinder) can invalidate a patent if it was deceptive; (4) DERIVATION — if one person's conception was communicated to another who then filed a patent on it, that is derivation, not independent invention.