CANADIAN FRACMASTER LTD.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5924454 Isolation toolExpiredJan 29, 96Jul 20, 99[F16L]
5894896 Orienting tool for coiled tubing drillingExpiredAug 21, 96Apr 20, 99[E21B]
5884698 Whipstock assemblyExpiredApr 07, 97Mar 23, 99[F21B]
5462129 Method and apparatus for erosive stimulation of open hole formationsExpiredJun 01, 94Oct 31, 95[E21B]
5452923 Coiled tubing connectorExpiredJun 28, 94Sep 26, 95[F16L, F21B]
5419399 Hydraulic disconnectExpiredJun 28, 94May 30, 95[E21B]
5279364 Guide arch for tubingExpiredApr 15, 91Jan 18, 94[E21B]
4701270 Novel compositions suitable for treating deep wellsExpiredFeb 18, 86Oct 20, 87[E21B]
4567947 Gellation of pure methyl alcoholExpiredSep 13, 83Feb 04, 86[E21B]
4448709 Proppant concentratorExpiredAug 03, 81May 15, 84[E21B, B01D]
4374545 Carbon dioxide fracturing process and apparatusExpiredJan 07, 82Feb 22, 83[E21B]
4278131 Port apparatus for well pipingExpiredNov 13, 79Jul 14, 81[E21B]
4241786 Well tree saverExpiredMay 02, 79Dec 30, 80[E21B]

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