Cancellation for fraud on the inventor.
Section 33
SEC. 33. Cancellation for fraud on the inventor.—In the case of the ground specified on paragraph (c), section twenty-eight hereof, if the petition for cancellation is made by or on behalf of the true and actual inventor from who the patentee fraudulently derived the invention and is successful on this ground, a patent may be obtained by such inventor, if he does have the patent, not withstanding any knowledge or use or publication of the patent canceled: Provided, That the true and actual inventor shall file an application for patent for such invention within six months after the order of cancellation has become final. The term of such patent, however, shall expire seventeen years from the date of issue of the patent canceled.