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Furnace and method of operating the same

US 1,741,209 A · Inventors: SWINDELL EDWARD H et al.

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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 31, 1929. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by December 31, 1946.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJanuary 29, 1923
GrantedDecember 31, 1929
Term endedDecember 31, 1946
Application number—
Classification (CPC)C21D9/00
Length8 pages

Timeline

Timeline From USPTO dates

19241927193019331936193919421945Application filedJan 29, 1923Patent grantedDec 31, 1929Term endedDec 31, 1946

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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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