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US 1,668,353 A · Inventors: BROOKE JR GEORGE 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 1, 1928. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by May 1, 1945.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 18, 1924
GrantedMay 1, 1928
Term endedMay 1, 1945
Application number—
Classification (CPC)—
Length3 pages

Timeline

Timeline From USPTO dates

1925192819311934193719401943Application filedMarch 18, 1924Patent grantedMay 1, 1928Term endedMay 1, 1945

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.