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Patent Assignment Assignee Details

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Assignee Name : NOWSCO WELL SERVICE LTD.

Total Assignments: 8

Assignment: 1

Reel/Frame:	003798/0785			Pages:	2
		Recorded:	09/05/1980
Conveyance:	LICENSE (SEE DOCUMENT FOR DETAILS).

Assignor

BLACK & CHRISTIE RESEARCH LTD,

Exec Dt:

01/02/1978

Assignee

NOWSCO WELL SERVICE LTD.

2200 NORCEN TOWER, 715- 5TH AVENUE S.W.

CALGARY ALBERTA, CANADA T2P 2X6

Properties

Pat #

Pub #

Intl #

App #

Pat #

Pub #

Intl #

App #

4126181

NONE

05808276

4176064

NONE

05960841

Correspondence name and address
	STEVENS, DAVIS, ET AL
	1911 JEFFERSON DAVIS HWY.
	ARLINGTON, VA 22202

Assignment: 2

Reel/Frame:	005782/0724			Pages:	3
		Recorded:	08/01/1991
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST.

Assignors

PACHLA, SYLVIA K.

Exec Dt:

08/10/1989

TAYLOR, ROBERT S.

Exec Dt:

08/10/1989

DELOREY, JOHN R.

Exec Dt:

08/10/1989

Assignee

NOWSCO WELL SERVICE LTD.

1300, 801 - 6TH AVENUE S.W.

CALGARY, ALBERTA T2P 4E1, CANADA

Property

Pat #

Pub #

Intl #

App #

5063997

NONE

07461119

Correspondence name and address
	OLIFF & BERRIDGE
	277 SO. WASHINGTON ST.
	P.O. BOX 19928
	ALEXANDRIA, VA 22320

Assignment: 3

Reel/Frame:	005870/0511			Pages:	7
		Recorded:	09/27/1991
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST.

Assignor

DOWASUE INDUSTRIES, LTD.

Exec Dt:

07/23/1991

Assignee

NOWSCO WELL SERVICE LTD.

2750. 801 - 6TH AVENUE S.W.

CALGARY, ALBERTA, CANADA T2P 4L8

Properties

Pat #

Pub #

Intl #

App #

Pat #

Pub #

Intl #

App #

4854384

NONE

07115866

4991651

NONE

07366510

Correspondence name and address
	STEVENS, DAVIS, MILLER AND MOSHER
	P. O. BOX 1427
	ALEXANDRIA, VA 22313

Assignment: 4

Reel/Frame:	007836/0534			Pages:	5
		Recorded:	02/15/1996
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Assignors

CLOUSTON, STUART D.

Exec Dt:

01/12/1996

GOODWIN, PAUL S.

Exec Dt:

01/12/1996

Assignee

NOWSCO WELL SERVICE LTD.

2750 801-6TH AVENUE S.W.

CALGARY, ALBERTA, CANADA T2P 4

Property

Pat #

Pub #

Intl #

App #

5836167

NONE

08646372

Correspondence name and address
	BUTLER & BINION, L.L.P.
	SUE Z. SHAPER
	1000 LOUISIANA, SUITE 1600
	HOUSTON, TEXAS 77002

Assignment: 5

Reel/Frame:	012621/0365			Pages:	4
		Recorded:	02/12/2002
Conveyance:	CHANGE OF NAME (SEE DOCUMENT FOR DETAILS).

Assignor

BJ SERVICES CANADA INC.

Exec Dt:

07/31/1996

Assignee

NOWSCO WELL SERVICE LTD.

5500 NORTHWEST CENTRAL DRIVE

HOUSTON, TEXAS 77092

Property

Pat #

Pub #

Intl #

App #

4945775

NONE

07362504

Correspondence name and address
	MARGARET A. KIRICK
	5500 NORTHWEST CENTRAL DRIVE
	HOUSTON, TX 77092

Assignment: 6

Reel/Frame:	012691/0630			Pages:	15
		Recorded:	03/08/2002
Conveyance:	CHANGE OF NAME (SEE DOCUMENT FOR DETAILS).

Assignor

BJ SERVICES CANADA INC.

Exec Dt:

07/31/1996

Assignee

NOWSCO WELL SERVICE LTD.

5500 NORTHWEST CENTRAL DRIVE

HOUSTON, TEXAS 77092

Property

Pat #

Pub #

Intl #

App #

5063997

NONE

07461119

Correspondence name and address
	MARGARET A. KIRICK
	5500 NW CENTRAL DR.
	HOUSTON, TX 77092

Assignment: 7

Reel/Frame:	008316/0680			Pages:	5
		Recorded:	01/16/1997
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Assignors

LUFT, H. BERNIE

Exec Dt:

12/13/1996

WILDE, GRAHAM

Exec Dt:

12/13/1996

Assignees

NOWSCO WELL SERVICE LTD.

1300 - 801-16TH AVENUE S.W.

CALGARY, ALBERTA T2P 4E1, CANADA

BJ SERVICES COMPANY, U.S.A.

5500 NORTHWEST CENTRAL DRIVE

HOUSTON, TEXAS 77092

Property

Pat #

Pub #

Intl #

App #

6015015

NONE

08564357

Correspondence name and address
	BUTLER & BINION, L.L.P.
	SUE Z. SHAPER
	1000 LOUISIANA
	SUITE 1600
	HOUSTON, TX 77002

Assignment: 8

Reel/Frame:	012598/0048			Pages:	14
		Recorded:	02/01/2002
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

CANADIAN FRACMASTER LTD.

Exec Dt:

06/28/1999

Assignee

NOWSCO WELL SERVICE LTD.

5500 NORTHWEST CENTRAL DRIVE

HOUSTON, TEXAS 77092

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5515920	NONE		08330373	5558160	NONE		08372354	5883053	NONE		08690543
5842530	NONE		08740763	5874385	NONE		08962219	6184184	NONE		09197845
6261998	NONE		09255769

Correspondence name and address
	MARGARET A. KIRICK
	5500 NORTHWEST CENTRAL DRIVE
	HOUSTON, TX 77092

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