PETROLEUM RECOVERY INSTITUTE
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Feb 17, 1998 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 22 Total Citation Count
- Jan 25, 1979 Earliest Filing
- 5 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
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Recent Publications
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Recent Patents
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Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5513707 Process for chemically treating reservoir pyrobitumen to improve permeabilityExpiredSep 23, 94May 07, 96[E21B]
5301539 Method for improving enhanced recovery of oil using surfactant-stabilized foamsExpiredOct 29, 91Apr 12, 94[G01N]
5060727 Method for improving enhanced recovery of oil using surfactant-stabilized foamsExpiredJan 02, 90Oct 29, 91[E21B]
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