Printed Publication

Under 35 U.S.C. § 102(a)(1) (AIA), prior art includes anything 'described in a printed publication' before the effective filing date of the claimed invention. A 'printed publication' is not limited to formal printed documents — courts apply a broad PUBLIC ACCESSIBILITY test: a document is a printed publication if it was sufficiently accessible to the public interested in the subject matter that a person exercising reasonable diligence could have located it. The document does not need to be mass-printed, commercially distributed, or formally published. What matters is accessibility: could an interested researcher find it?

In re Klopfenstein (Fed. Cir. 2004) established the key test for transient printed publications like conference posters and presentations. Klopfenstein's slides were displayed on a posterboard for 2.5 days at a conference — never formally published and never indexed. The Federal Circuit held: the slides constituted a printed publication because they were displayed publicly and accessible to interested researchers at the conference. Four factors for transient displays: (1) the LENGTH of time the display was exhibited; (2) the EASE with which attendees could have copied the content; (3) whether there were EXPECTATIONS of confidentiality; (4) the SOPHISTICATION of the audience — a highly specialized conference audience is likely to assimilate and remember technical details. The fact that the display was temporary and no copies were distributed did not prevent it from being a printed publication.

Yes — websites and online content can constitute printed publications. The standard is the same: was the content publicly accessible to interested persons? Courts examine: (1) Was the URL indexed or accessible via standard search engines? (2) Was there a clear publication date (e.g., HTTP headers, metadata, archive.org Wayback Machine timestamps)? (3) Was the content accessible without registration or password? (4) Was the content actually accessed or known to persons in the field? Websites behind registration walls, paywalls, or access-controlled systems may not qualify as publicly accessible. Web archiving services (Wayback Machine) are commonly used to establish that web content existed and was accessible on a specific date — this evidence is increasingly important in patent disputes.

A thesis or dissertation typically qualifies as a printed publication if it was indexed and accessible. A thesis deposited in a university library and cataloged in the library's index is generally considered a printed publication — interested researchers could locate it through a diligent search. MIT Thesis Example: MIT theses deposited in the university library and cataloged are prior art. The date of publication is the date the thesis was cataloged and made available, not the date of the defense. A thesis submitted but not yet cataloged or accessible may not be a printed publication. Non-English theses cataloged in foreign university libraries can also qualify as printed publications — accessibility to researchers worldwide is the standard, not accessibility in the United States.

Under AIA 35 U.S.C. § 102(a)(1): a printed publication is prior art if published/accessible BEFORE the effective filing date of the claimed invention (no grace period, unless the publication was made by the inventor — then § 102(b)(1)(A) gives a 1-year grace period). Key dates: (1) Under AIA, the effective filing date is the priority date — the earliest filing date claimed by the patent application; (2) Under pre-AIA: the critical date for a printed publication was 1 year before the actual filing date (statutory bar); before the critical date, a printed publication is prior art only if published before the date of invention (which required the inventor to prove an earlier invention date); (3) Inventor's own disclosures: the AIA 1-year grace period protects disclosures made by the inventor within 1 year before filing — these do NOT constitute prior art against the inventor's own application.