Patent Assignment
Reel/Frame 010484/0562
Assignment of Assignor's Interest
Recorded: 1999-12-29
Pages: 4
Assignor
ZHANG, KEWEI
Executed: 1999-12-16
Assignee
NOWSCO-FRACMASTER LTD.
6620-36TH STREET S.E., CALGARY, ALBERTA, T2C 2, CANADA
Covered Property
(1)
Fluids for Fracturing Subterranean Formations
Patent:
6,468,945 →
Application:
09/474,164 →
Related Assignments
(5)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Aug 13, 2001
From: ZHANG, KEWEI
To: NOWSCO-FRACMASTER LTD.
Reel/Frame 012068/0701 →
Change of Name
Sep 6, 2001
From: NOWSCO-FRACMASTER COMPANY
To: BJ SERVICES COMPANY CANADA
Reel/Frame 012139/0869 →
Certificate of Amendment
Sep 6, 2001
From: NOWSCO-FRACMASTER, LTD.
To: NOWSCO-FRACMASTER COMPANY
Reel/Frame 012139/0935 →
Assignment of Assignor's Interest
Feb 13, 2012
From: BAKER HUGHES CANADA COMPANY
To: BAKER HUGHES INCORPORATED
Reel/Frame 027695/0065 →
Certificate of Amalgamation
Feb 13, 2012
From: BJ SERVICES COMPANY CANADA
To: BAKER HUGHES CANADA COMPANY
Reel/Frame 027697/0211 →