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Process for the preparation of base oils for the production of lubricating oil

US 3,730,877 A · Inventors: QUIK W 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 May 1, 1973. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by May 1, 1990.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledDecember 5, 1968
GrantedMay 1, 1973
Term endedMay 1, 1990
Application number—
Classification (CPC)C10G45/62 +1 more
Length6 pages

Timeline

Timeline From USPTO dates

19691972197519781981198419871990Application filedDec 5, 1968Patent grantedMay 1, 1973Term endedMay 1, 1990

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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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