Patent Assignment
Reel/Frame 010498/0250
Assignment of Assignor's Interest
Recorded: 1999-12-29
Pages: 5
Assignors
ZHANG, KEWEI
Executed: 1999-12-16
PIERCE, RON
Executed: 1999-12-17
LITT, NICOLE DEANNE
Executed: 1999-12-21
GUPTA, D.V. SATYANARAYANA
Executed: 1999-12-17
Assignee
NOWSCO-FRACMASTER LTD.
6620 - 36TH STREET, S.E., CALGARY, ALBERTA, T2C 2, CANADA
Covered Property
(1)
Foam-Fluid for Fracturing Subterranean Formations
Patent:
6,410,489 →
Application:
09/474,149 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Sep 10, 2001
From: NOWSCO-FRACMASTER COMPANY
To: BJ SERVICES COMPANY CANADA
Reel/Frame 012155/0285 →
Certificate of Amendment
Sep 10, 2001
From: NOWSCO-FRACMASTER, LTD.
To: NOWSCO-FRACMASTER COMPANY
Reel/Frame 012155/0330 →
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 →