ELDER OIL TOOLS, A CORPORATION OF TEXAS

Patent Owner

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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
5332038 Gravel packing systemAug 06, 92Jul 26, 94[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4967844 Selectively operable ball valve and production packer systemExpiredApr 28, 89Nov 06, 90[E21B]
4941532 Anchor deviceExpiredMar 31, 89Jul 17, 90[E21B]

Top Inventors for This Owner

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