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MPEP Summary Chapter 900 Prior Art, Classification, Search

This chapter gives a basic overview for patent examiners explaining how to conduct a prior art search. The prior art section discusses some questionable reference types and whether or not they are considered prior art. The reference types outlined here include; matter cancelled in an application, copending abandoned applications and foreign patents.

This section is not tested on the exam because it is primarily useful to examiners and not the licensed patent practitioner. The following topics are the only areas of this section that have been tested on the patent bar exam.

 

901 Prior art
if an abandoned application was previously published under 35 U.S.C. 112(b), that patent application publication is available as prior art under 35 U.S.C. 102(a) and 102(b) as of its patent application publication date
this is due to the fact that a patent application publication is considered to be a "printed publication" within the meaning of 35 U.S.C. 102(a) and 102(b)

pending U.S. applications filed before November 29, 2000, that are not voluntarily published, and applications filed on or after November 29, 2000, which have not been published, are generally preserved in confidence

Proper prior art references:

canceled matter:
matter that is canceled from the application file wrapper of a U.S. patent may be used as prior art
it will count as prior art as of the patent date since it is then considered prior public knowledge under 35 U.S.C. 102(a)
it will not be considered a proper reference as of the filing date under 35 U.S.C. 102(e)

copending abandoned applications:
if a patent refers to and relies on the disclosure of a copending abandoned application, the disclosure will be considered a prior art reference

if a reference patent claims the benefit of a copending but abandoned application disclosing the same subject matter as the patent, the abandoned application may be considered prior art
the effective date of the reference in regards to the common subject matter is the filing date of the abandoned application

foreign patents:
in general, a foreign patent and the contents of its application should not be cited as a reference until an examiner can confirm its date of patenting or publication by reviewing a copy of the document

 

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