37 CFR 41.128: Sanctions.

(a) The Board may impose a sanction against a party for misconduct, including:

(1) Failure to comply with an applicable rule or order in the proceeding;

(2) Advancing a misleading or frivolous request for relief or argument; or

(3) Engaging in dilatory tactics.

(b) Sanctions include entry of:

(1) An order holding certain facts to have been established in the proceeding;

(2) An order expunging, or precluding a party from filing, a paper;

(3) An order precluding a party from presenting or contesting a particular issue;

(4) An order precluding a party from requesting, obtaining, or opposing discovery;

(5) An order excluding evidence;

(6) An order awarding compensatory expenses, including attorney fees;

(7) An order requiring terminal disclaimer of patent term; or

(8) Judgment in the contested case.