Opinion · Supreme Court of the United States

Chapman v. Wintroath

252 U.S. 126

Type
Opinion
Court
Supreme Court of the United States
Jurisdiction
Federal
Date
1920-03-01
Topic
general

Me. Justice Clarice, 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 d,eep well pumps.” The mechanism involved was complicated, the specification intricate and. long, and the claims numbered thirty-four.

Citator

UpLaw has not yet analyzed Chapman v. Wintroath. The absence of a flag is not a finding that it is good law.

Cited by
102 opinions

Headnotes

  1. Patent Law — Time for Filing Divisional Application Under Rev. Stat. § 4886, an inventor whose application discloses but does not claim an invention later patented to another may file a second or divisional application claiming that invention at any time within two years after the conflicting patent issues; courts may not shorten this statutory period on the ground that the resulting delay is prejudicial to public or private interests, because the right is purely statutory and a party seeking a right under the patent statutes may avail himself of all their provisions. 252 U.S. at 133–134
  2. Patent Law — Divisional Applications A later or divisional application claiming an invention clearly disclosed but not claimed in an earlier application is not to be treated as an amendment to the original application, and therefore is not subject to the one-year limitation that Rev. Stat. § 4894 imposes on further prosecution of an application after notice of Patent Office action; the notice given an applicant by the issuance of a conflicting patent is constructive and indefinite, unlike the actual and specific notice required by § 4894. 252 U.S. at 138–139
  3. Patent Law — Laches and Abandonment The right to file a divisional application is not lost by laches or abandonment merely because of delay not exceeding the two-year period allowed by the statute, where the original application fully disclosed the invention and was regularly prosecuted as required by law and Patent Office rules. 252 U.S. at 139
  4. Patent Law — Constructive Reduction to Practice Where an invention is clearly disclosed in an application but not claimed there, and is later claimed in a divisional application, the original application is deemed a constructive reduction of the invention to practice, and the later application is given the filing date of the earlier with all of its priority of right. 252 U.S. at 136–137