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Electric circuit breaker wherein the operation of separable arcing contacts is dependent on the magnitude of current in the main contacts

US 3,249,729 A · Inventors: FORNWALT MAX B

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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 3, 1966. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by May 3, 1983.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledOctober 18, 1963
GrantedMay 3, 1966
Term endedMay 3, 1983
Application number—
Classification (CPC)H01H1/38 +2 more
Length11 pages

Timeline

Timeline From USPTO dates

1964196619681970197219741976197819801982Application filedOct 18, 1963Patent grantedMay 3, 1966Term endedMay 3, 1983

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

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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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