37 CFR 2.91 - Declaration of interference.

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§ 2.91 Declaration of interference.
(a) An interference will not be declared between two applications or between an application and a registration except upon petition to the Director. Interferences will be declared by the Director only upon a showing of extraordinary circumstances which would result in a party being unduly prejudiced without an interference. In ordinary circumstances, the availability of an opposition or cancellation proceeding to the party will be deemed to remove any undue prejudice.
(b) Registrations and applications to register on the Supplemental Register, registrations under the Act of 1920, and registrations of marks the right to use of which has become incontestable are not subject to interference.
[37 FR 2881, Feb. 9, 1972, as amended at 54 FR 34897, Aug. 22, 1989]

Title 37 published on 2013-07-01

The following are only the Rules published in the Federal Register after the published date of Title 37.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-10-22; vol. 79 # 204 - Wednesday, October 22, 2014
    1. 79 FR 63036 - Renaming of Express Mail® to Priority Mail Express®
      GPO FDSys XML | Text
      DEPARTMENT OF COMMERCE, United States Patent and Trademark Office
      Final rule.
      Effective Date: The changes in this final rule are effective on October 22, 2014.
      37 CFR Parts 1, 2, 7, 11, 41, and 42

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United States Code

Title 37 published on 2013-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 37 CFR 2 after this date.

  • 2014-10-22; vol. 79 # 204 - Wednesday, October 22, 2014
    1. 79 FR 63036 - Renaming of Express Mail® to Priority Mail Express®
      GPO FDSys XML | Text
      DEPARTMENT OF COMMERCE, United States Patent and Trademark Office
      Final rule.
      Effective Date: The changes in this final rule are effective on October 22, 2014.
      37 CFR Parts 1, 2, 7, 11, 41, and 42