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Hydraulic control mechanism for drift recorders

US 2,745,189 A · Inventors: GARRISON MARION A

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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 15, 1956. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by May 15, 1973.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJanuary 10, 1955
GrantedMay 15, 1956
Term endedMay 15, 1973
Application number—
Classification (CPC)E21B47/0236
Length3 pages

Timeline

Timeline From USPTO dates

195619581960196219641966196819701972Application filedJan 10, 1955Patent grantedMay 15, 1956Term endedMay 15, 1973

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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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