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Change-over device for boiler-feed-water heaters and similar apparatus, especially applicable for locomotives

US 1,759,986 A · Inventors: PAUL JULIUSBURGER

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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 27, 1930. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by May 27, 1947.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledDecember 8, 1925
GrantedMay 27, 1930
Term endedMay 27, 1947
Application number—
Classification (CPC)F22D1/42
Length7 pages

Timeline

Timeline From USPTO dates

19261929193219351938194119441947Application filedDec 8, 1925Patent grantedMay 27, 1930Term endedMay 27, 1947

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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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