Patent Assignment
Reel/Frame 005122/0589
Security Interest
Recorded: 1989-05-22
Pages: 15
Assignor
WESTERN COMPANY OF NORTH AMERICA THE
Executed: 1989-04-27
Assignee
WILMINGTON TRUST COMPANY
DELAWARE
Covered Property
(1)
Crosslinker Composition for High Temperature Hydraulic Fracturing Fluids
Patent:
4,534,870 →
Application:
06/392,602 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Jun 28, 1982
From: WILLIAMS, DENNIS A.
To: WESTERN COMPANY OF NORTH AMERICA THE, A CORP OF DE.
Reel/Frame 004032/0853 →
Assignment of Assignor's Interest
Jun 19, 1995
From: WESTERN COMPANY OF NORTH AMERICA, THE
To: BJ SERVICES COMPANY, U.S.A.
Reel/Frame 007526/0440 →
Assignment of Assignor's Interest
Oct 31, 2001
From: BJ SERVICES COMPANY, U.S.A.
To: BJ SERVICES COMPANY
Reel/Frame 012333/0812 →