Patent Assignment
Reel/Frame 006199/0720
Assignment of Assignors Interest.
Recorded: 1992-06-23
Pages: 2
Assignor
WONG, FRED S.
Executed: 1992-05-21
Assignee
GRACE ENERGY CORPORATION, A CORP. OF DE
2 GALLERIA TOWER, 13455 NOEL RD., SUITE 1500, DALLAS, TEXAS, 75240
Covered Property
(1)
Sliding Sleeve Valve
Patent:
5,263,683 →
Application:
07/878,734 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Aug 30, 1993
From: HOMCO INTERNATIONAL, INC.
To: WEATHERFORD U.S., INC.
Reel/Frame 006663/0918 →
Assignment of Assignor's Interest
Sep 20, 1993
From: WEATHERFORD, U.S., INC.
To: TUBE-ALLOY CORPORATION
Reel/Frame 006696/0339 →
Assignment of Assignor's Interest
Sep 30, 1996
From: WEATHERFORD U.S., INC.
To: TUBE-ALLOY CORPORATION
Reel/Frame 008153/0542 →
Assignment of Assignor's Interest
Jul 18, 2000
From: TUBE-ALLOY CORP.
To: WEATHERFORD/LAMB, INC.
Reel/Frame 010977/0141 →