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Method of and apparatus for hardening surfaces of metal bodies

US 2,273,809 A · Inventors: KINZEL AUGUSTUS 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 February 17, 1942. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by February 17, 1959.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJuly 13, 1938
GrantedFebruary 17, 1942
Term endedFebruary 17, 1959
Application number—
Classification (CPC)C21D9/08
Length6 pages

Timeline

Timeline From USPTO dates

1939194219451948195119541957Application filedJuly 13, 1938Patent grantedFeb 17, 1942Term endedFeb 17, 1959

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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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