DREXEL INSTURMENTS, INC., A TEXAS CORP.
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Sep 01, 1987 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 202 Total Citation Count
- Jan 22, 1979 Earliest Filing
- 7 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
- No Technology to Display
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Recent Publications
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Recent Patents
- No Recent Patents to Display
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
4690033 Self actuating locking and unlocking arrangement and method for reciprocating piston type actuatorsExpiredDec 16, 85Sep 01, 87[F15B]
4690411 Bonded mechanically inner connected seal arrangement for a blowout preventerExpiredDec 23, 85Sep 01, 87[E21B, F16J]
4646825 Blowout preventer, shear ram, shear blade and seal thereforExpiredJan 02, 86Mar 03, 87[E21B]
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