Patent Assignment
Reel/Frame 005782/0724
Assignment of Assignors Interest.
Recorded: 1991-08-01
Pages: 3
Assignors
PACHLA, SYLVIA K.
Executed: 1989-08-10
TAYLOR, ROBERT S.
Executed: 1989-08-10
DELOREY, JOHN R.
Executed: 1989-08-10
Assignee
NOWSCO WELL SERVICE LTD.
1300, 801 - 6TH AVENUE S.W., CALGARY, ALBERTA T2P 4E1, CANADA
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 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 →
Certificate of Amendment
Mar 8, 2002
From: NOWSCO WELL SERVICES LTD.
To: NOWSCO-FRACMASTER LTD.
Reel/Frame 012698/0342 →