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Regulation of rotary compressors

US 1,372,502 A · Inventors: WILLIBALD GRUN

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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 March 22, 1921. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by March 22, 1938.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 14, 1912
GrantedMarch 22, 1921
Term endedMarch 22, 1938
Application number—
Classification (CPC)F04D27/0261 +1 more
Length12 pages

Timeline

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191319161919192219251928193119341937Application filedMarch 14, 1912Patent grantedMarch 22, 1921Term endedMarch 22, 1938

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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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