37 C.F.R. § 41.201
In addition to the definitions in §§ 41.2 and 41.100, the following definitions apply to proceedings under this subpart:
Accord benefit means Board recognition that a patent application provides a proper constructive reduction to practice under 35 U.S.C. 102(g)(1).
Constructive reduction to practice means a described and enabled anticipation under 35 U.S.C. 102(g)(1), in a patent application of the subject matter of a count. Earliest constructive reduction to practice means the first constructive reduction to practice that has been continuously disclosed through a chain of patent applications including in the involved application or patent. For the chain to be continuous, each subsequent application must comply with the requirements of 35 U.S.C. 119-121, 365, or 386.
Count means the Board's description of the interfering subject matter that sets the scope of admissible proofs on priority. Where there is more than one count, each count must describe a patentably distinct invention.
Involved claim means, for the purposes of 35 U.S.C. 135(a), a claim that has been designated as corresponding to the count.
Senior party means the party entitled to the presumption under § 41.207(a)(1) that it is the prior inventor. Any other party is a junior party.
Threshold issue means an issue that, if resolved in favor of the movant, would deprive the opponent of standing in the interference. Threshold issues may include:
(2) In the case of an involved application claim first made after the publication of the movant's application or issuance of the movant's patent:
[69 FR 50003, Aug. 12, 2004, as amended at 77 FR 46631, Aug. 6, 2012; 80 FR 17971, Apr. 2, 2015]