Based on Title 35, U.S.C., 1946 ed., § 71 (R.S. 4922).

The necessity for a disclaimer to recover on valid claims is eliminated. See section 253.

Language is changed.

2011—Puspan. L. 112–29 struck out “, without deceptive intention,” after “Whenever”.

1975—Puspan. L. 93–596 substituted “Patent and Trademark Office” for “Patent Office”.

Amendment by Puspan. L. 112–29 effective upon the expiration of the 1-year period beginning on Sept. 16, 2011, and applicable to proceedings commenced on or after that effective date, see section 20(l) of Puspan. L. 112–29, set out as a note under section 2 of this title.

Amendment by Puspan. L. 93–596 effective Jan. 2, 1975, see section 4 of Puspan. L. 93–596, set out as a note under section 1111 of Title 15, Commerce and Trade.