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CHAPMAN v. WINTROATH

No. 117.

252 U.S. 126 (1920)

40 S.Ct. 234

64 L.Ed. 491

CHAPMAN ET AL. v. WINTROATH.

Supreme Court of United States.

Decided March 1, 1920.

Attorney(s) appearing for the Case

Mr. John L. Jackson, with whom Mr. Albert H. Adams was on the brief, for petitioners:

Mr. Paul Synnestvedt, with whom Mr. H.L. Lechner was on the briefs, for respondent:

Mr. Melville Church, by leave of court, filed a brief as amicus curiae.

Mr. John C. Pennie, Mr. Dean S. Edmonds, Mr. Charles J. O'Neill and Mr. Helge Murray, by leave of court, filed a brief as amici curiae.

MR. JUSTICE CLARKE delivered the opinion of the court.

In 1909 Mathew T. Chapman and Mark C. Chapman filed an application for a patent on an "improvement in deep well pumps." The mechanism involved was complicated, the specification intricate and long, and the claims numbered thirty-four. The application met with unusual difficulties in the Patent Office, and, although it had been regularly prosecuted, as required by law and the rules of the Office, it was still pending...

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