Whenever a claim of a patent is invalid, an action may be maintained for the infringement of a claim of the patent which may be valid. The patentee shall recover no costs unless a disclaimer of the invalid claim has been entered at the Patent and Trademark Office before the commencement of the suit.
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
Language is changed.
2011—Pub. L. 112–29struck out “, without deceptive intention,” after “Whenever”.
1975—Pub. L. 93–596substituted “Patent and Trademark Office” for “Patent Office”.
Effective Date of 2011 Amendment
Amendment by Pub. L. 112–29effective 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) ofPub. L. 112–29, set out as a note under section
2 of this title.
The table below lists the classification updates, since Jan. 3, 2012, for this section. Updates to a broader range of sections may be found at the update page for containing chapter, title, etc.
The most recent Classification Table update that we have noticed was Tuesday, August 13, 2013
An empty table indicates that we see no relevant changes listed in the classification tables. If you suspect that our system may be missing something, please double-check with the Office of the Law Revision Counsel.
Description of Change
Statutes at Large
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