Thirtieth Congress,
thiFirst Session,
BE IT ENACTED
By the Senate and House of Representatives of the United States of America in
Congress Assembled.

That in all cases where any patentee or his legal representatives, shall, within one year from the passage of this act, make it appear to the satisfaction of the Commissioner of Patents, that the said Patentee without fault on his part had failed to obtain an extension of his patent—that is to say; for want of time, or for informality, or for defect in the specifications, or by reason of accident or mistake, and that he has persevered in endeavors to procure an extension by petition to Congress or otherwise, the said patentee or his legal representatives, may make a new application for a renewal of his patent, in conformity eighth the eighteenth section of the act, entitled “An act to promote the progress of the useful arts and to repeal all acts and parts of acts heretofore made for that purpose,” passed July fourth, one thousand eight hundred and thirty-six, and the supplement thereto, and on his complying with all the requisites of said acts, the said letters patent may be extended or renewed for the term, dating from the time of extension and in the manner therein provided—but no action shall be maintained for any infringement of such patent committed between the expiration and extension thereof, and all persons who shall after such expiration and before such extension have manufactured or put in use any machine or “composition of matter”

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secured by such patent, their executors, administrators or assigns, may continue the use of said machine or “composition of matter” actually made during that period, for and during said extended term, but no one shall make or put in use such machine or ‘composition’ after such renewal. And if any person shall before such renewal, or within eighteen months before said expiration, have made preparations specially for manufacturing such machine or “composition of matter,” he may proceed in the same and carry on the said manufacture during said extended term on such terms as he and the patentee may agree upon, or as the District Court of the United States of the District where such person so desiring to proceed in such manufacture resides, on a petition of such person to be filed within one year from the date of such extension, shall direct; which said Court are hereby directed and authorized to do.