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Four-cycle internal-combustion engine

US 1,541,069 A · Inventors: PETERS GALEN H

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Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Granted June 9, 1925. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by June 9, 1942.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJanuary 16, 1923
GrantedJune 9, 1925
Term endedJune 9, 1942
Application number—
Classification (CPC)F01L1/30 +1 more
Length7 pages

Timeline

Timeline From USPTO dates

1924192619281930193219341936193819401942Application filedJan 16, 1923Patent grantedJune 9, 1925Term endedJune 9, 1942

Sources & verification

Official USPTO records

Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

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