Patent Assignment
Reel/Frame 012139/0869
Change of Name
Recorded: 2001-09-06
Pages: 2
Assignor
NOWSCO-FRACMASTER COMPANY
Executed: 2000-05-23
Assignee
BJ SERVICES COMPANY CANADA
1300 801-6TH AVENUE, S.W., CALGARY, ALBERTA T2P 4L8, 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
Dec 29, 1999
From: ZHANG, KEWEI
To: NOWSCO-FRACMASTER LTD.
Reel/Frame 010484/0562 →
Assignment of Assignor's Interest
Aug 13, 2001
From: ZHANG, KEWEI
To: NOWSCO-FRACMASTER LTD.
Reel/Frame 012068/0701 →
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 →