Heavy Oil Process, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4434849 Method and apparatus for recovering high viscosity oilsExpiredFeb 09, 81Mar 06, 84[E21B]
4410216 Method for recovering high viscosity oilsExpiredMay 27, 81Oct 18, 83[E21B, E21C]

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