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Recovery of heavy oils by steam extraction

US 3,155,160 A · Inventors: CRAIG JR FORREST F 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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  • Granted November 3, 1964. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by November 3, 1981.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledNovember 27, 1959
GrantedNovember 3, 1964
Term endedNovember 3, 1981
Application number—
Classification (CPC)E21B43/2406
Length7 pages

Timeline

Timeline From USPTO dates

19601963196619691972197519781981Application filedNov 27, 1959Patent grantedNov 3, 1964Term endedNov 3, 1981

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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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