35 U.S.C. § 301
Section 301 · Citation of prior art
This is § 1 of the Bayh-Dole Act of 1980
Amended 2 times on record
Applied in 46 court decisions — leading case Molins PLC v. Textron, Inc. (1995)
Most recently applied in Arthrex, Inc. v. Smith & Nephew, Inc. (May 2022)
How often courts cite this section
Court decisions citing this, by year.Markers show enactment, consequential amendments, and circuit splits over this section — watch for a citation surge after a change or a disagreement. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
(a) In General.—Any person at any time may cite to the Office in writing—
(1) prior art consisting of patents or printed publications which that person believes to have a bearing on the patentability of any claim of a particular patent; or
(2) statements of the patent owner filed in a proceeding before a Federal court or the Office in which the patent owner took a position on the scope of any claim of a particular patent.
(b) Official File.—If the person citing prior art or written statements pursuant to subsection (a) explains in writing the pertinence and manner of applying the prior art or written statements to at least 1 claim of the patent, the citation of the prior art or written statements and the explanation thereof shall become a part of the official file of the patent.
(c) Additional Information.—A party that submits a written statement pursuant to subsection (a)(2) shall include any other documents, pleadings, or evidence from the proceeding in which the statement was filed that addresses the written statement.
(d) Limitations.—A written statement submitted pursuant to subsection (a)(2), and additional information submitted pursuant to subsection (c), shall not be considered by the Office for any purpose other than to determine the proper meaning of a patent claim in a proceeding that is ordered or instituted pursuant to section 304, 314, or 324. If any such written statement or additional information is subject to an applicable protective order, such statement or information shall be redacted to exclude information that is subject to that order.
(e) Confidentiality.—Upon the written request of the person citing prior art or written statements pursuant to subsection (a), that person's identity shall be excluded from the patent file and kept confidential.
Editorial notes U.S. Code · Office of the Law Revision Counsel
Amendments
2011—Pub. L. 112–29 amended section generally. Prior to amendment, text read as follows: “Any person at any time may cite to the Office in writing prior art consisting of patents or printed publications which that person believes to have a bearing on the patentability of any claim of a particular patent. If the person explains in writing the pertinency and manner of applying such prior art to at least one claim of the patent, the citation of such prior art and the explanation thereof will become a part of the official file of the patent. At the written request of the person citing the prior art, his or her identity will be excluded from the patent file and kept confidential.”
Effective Date of 2011 Amendment
Pub. L. 112–29, §6(g)(3), Sept. 16, 2011, 125 Stat. 312, provided that: “The amendments made by this subsection [amending this section] shall take effect upon the expiration of the 1-year period beginning on the date of the enactment of this Act [Sept. 16, 2011] and shall apply to any patent issued before, on, or after that effective date.”
Effective Date
Chapter effective July 1, 1981, and applicable to patents in force as of July 1, 1981, or issued thereafter, see section 8(b) of Pub. L. 96–517, set out as an Effective Date of 1980 Amendment note under section 41 of this title.