C-TECH OILWELL TECHNOLOGIES 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 195

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7032676 Well string injection system and methodApr 24, 03Apr 25, 06[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7383879 Well string injection system and methodExpiredNov 28, 05Jun 10, 08[]
2008/0017,388 Well string injection system and methodAbandonedJul 02, 07Jan 24, 08[E21B]
2001/0056,259 Spring-powered infusion pumpAbandonedJun 29, 01Dec 27, 01[A61M]

Top Inventors for This Owner

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