Patent Assignment
Reel/Frame 012698/0342
Certificate of Amendment
Recorded: 2002-03-08
Pages: 7
Assignor
NOWSCO WELL SERVICES LTD.
Executed: 1999-07-06
Assignee
NOWSCO-FRACMASTER LTD.
5500 NORTHWEST CENTRAL DRIVE, HOUSTON, TEXAS, 77092
Covered Property
(1)
Method of Preventing Precipitation of Iron Compounds During Acid Treatment of Wells
Patent:
5,063,997 →
Application:
07/461,119 →
Related Assignments
(6)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Aug 1, 1991
From: PACHLA, SYLVIA K.; TAYLOR, ROBERT S.; DELOREY, JOHN R.
To: NOWSCO WELL SERVICE LTD.
Reel/Frame 005782/0724 →
Assignment of Assignor's Interest
Mar 8, 2002
From: BJ SERVICES COMPANY CANADA
To: BJ SERVICES COMPANY
Reel/Frame 012691/0482 →
Change of Name
Mar 8, 2002
From: NOWSCO-FRACMASTER COMPANY
To: BJ SERVICES COMPANY CANADA
Reel/Frame 012691/0484 →
Certificate of Amalgamation
Mar 8, 2002
From: NOWSCO-FRACMASTER LTD.
To: NOWSCO-FRACMASTER COMPANY
Reel/Frame 012691/0552 →
Assignment of Assignor's Interest
Mar 8, 2002
From: NOWSCO-FRACMASTER LTD.
To: NOWSCO-FRACMASTER LTD.
Reel/Frame 012691/0561 →
Change of Name
Mar 8, 2002
From: BJ SERVICES CANADA INC.
To: NOWSCO WELL SERVICE LTD.
Reel/Frame 012691/0630 →