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Pumping apparatus

US 1,712,694 A · Inventors: ENGSTRAND GUNNAR C

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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 May 14, 1929. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by May 14, 1946.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledFebruary 12, 1924
GrantedMay 14, 1929
Term endedMay 14, 1946
Application number—
Classification (CPC)—
Length3 pages

Timeline

Timeline From USPTO dates

19251928193119341937194019431946Application filedFeb 12, 1924Patent grantedMay 14, 1929Term endedMay 14, 1946

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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

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

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