BJ SEVICES CANADA INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 393
 
  
 
C09K MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR194

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5883053 Nitrogen/carbon dioxide combination fracture treatmentJul 31, 96Mar 16, 99[C09K, E21B]
5558160 Nitrogen/carbon dioxide combination fracture treatmentJan 13, 95Sep 24, 96[E21B]
5515920 High proppant concentration/high CO.sub.2 ratio fracturing systemOct 27, 94May 14, 96[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6261998 Refined oil gelling systemExpiredFeb 23, 99Jul 17, 01[C09K]
6184184 Encapsulated breaker for oil gel systemExpiredNov 23, 98Feb 06, 01[C09K]
5874385 High viscosity crosslinked gelled alcoholExpiredOct 31, 97Feb 23, 99[C09K, E21B]
5842530 Hybrid coiled tubing/conventional drilling unitExpiredNov 01, 96Dec 01, 98[E21B]

Top Inventors for This Owner

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