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Pulsator operated percussive device

US 2,669,840 A · Inventors: JOY JOSEPH F

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Overview

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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 February 23, 1954. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by February 23, 1971.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 24, 1948
GrantedFebruary 23, 1954
Term endedFebruary 23, 1971
Application number—
Classification (CPC)E21B6/08 +1 more
Length8 pages

Timeline

Timeline From USPTO dates

19491952195519581961196419671970Application filedMarch 24, 1948Patent grantedFeb 23, 1954Term endedFeb 23, 1971

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

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

Everything on this page comes from the USPTO record linked above.