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US 2,182,919 A · Inventors: SYDNEY HAINSWORTH ARTHUR

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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 December 12, 1939. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by December 12, 1956.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJanuary 12, 1939
GrantedDecember 12, 1939
Term endedDecember 12, 1956
Application number—
Classification (CPC)—
Length3 pages

Timeline

Timeline From USPTO dates

194019421944194619481950195219541956Application filedJan 12, 1939Patent grantedDec 12, 1939Term endedDec 12, 1956

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.