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Patent Assignment Assignor Details
NOTE:Results display only for issued patents and published applications. For pending or abandoned applications please consult USPTO staff.

Assignor Name : MARKEL, DANIEL C.
Total Assignments: 15
Assignment: 1
Reel/Frame:005402/0207   Pages: 3
Recorded: 08/07/1990
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
MARKEL, DANIEL C.
Exec Dt:
08/06/1990
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
5000 GULF FREEWAY (P.O. BOX 2175)
A CORP. OF TX
HOUSTON, TEXAS 77023
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5095999
NONE
07563657
Correspondence name and address
SCHLUMBERGER TECHNOLOGY CORP.
ATTN: PATENT COUNSEL
P. O. BOX 2175
HOUSTON, TX 77252-2175
Assignment: 2
Reel/Frame:005794/0974   Pages: 3
Recorded: 06/27/1991
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
MARKEL, DANIEL C.
Exec Dt:
06/24/1991
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION, A CORPORATION OF TX
5000 GULF FREEWAY
P.O. BOX 2175
HOUSTON, TEXAS 77023
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5123356
NONE
07725369
Correspondence name and address
SCHLUMBERGER TECHNOLOGY CORPORATION
PATENT COUNSEL
P. O. BOX 2175
HOUSTON, TX 77252-2175
Assignment: 3
Reel/Frame:008525/0450   Pages: 4
Recorded: 04/25/1997
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MARKEL, DANIEL C.
Exec Dt:
04/03/1997
2
LOPEZ DE CARDENAS, JORGE E.
Exec Dt:
04/03/1997
3
VU, VICTOR M.
Exec Dt:
04/22/1997
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
PATENT COUNSEL
P.O. BOX 2175
HOUSTON, TEXAS 77252
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5816343
NONE
08846079
Correspondence name and address
SCHLUMBERGER TECHNOLOGY CORPORATION
GORDON G. WAGGETT
P. O. BOX 2175
HOUSTON, TX 77252-2175
Assignment: 4
Reel/Frame:010399/0505   Pages: 9
Recorded: 11/18/1999
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MARKEL, DANIEL C.
Exec Dt:
07/28/1999
2
SPENLEY, KAREN
Exec Dt:
07/30/1999
3
SJOGREN, CHARLES A.
Exec Dt:
11/12/1999
4
SEWELL, DAVID E.
Exec Dt:
11/17/1999
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
110 SCHLUMBERGER DRIVE
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6453817
NONE
09442668
Correspondence name and address
SCHLUMBERGER TECHNOLOGY CORPORATION
JEFFREY E. GRIFFIN
14910 AIRLINE ROAD
P.O. BOX 1590
ROSHARON, TX 77583-1590
Assignment: 5
Reel/Frame:011200/0219   Pages: 5
Recorded: 10/03/2000
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MARKEL, DANIEL C.
Exec Dt:
08/02/2000
2
VU, VICTOR M.
Exec Dt:
08/02/2000
3
FARRANT, SIMON L.
Exec Dt:
07/31/2000
4
BROOKS, JAMES E.
Exec Dt:
08/01/2000
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
110 SCHLUMBERGER DRIVE
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6591911
NONE
09620100
Correspondence name and address
SCHLUMBERGER RESERVOIR COMPLETION CENTER
JEFFREY E. GRIFFIN
ATTN: INTELLECTUAL PROPERTY COUNSEL
14910 AIRLINE ROAD
ROSHARON, TEXAS 77583-1590
Assignment: 6
Reel/Frame:011302/0187   Pages: 7
Recorded: 11/06/2000
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
BROOKS, JAMES E.
Exec Dt:
08/01/2000
2
YANG, WENBO
Exec Dt:
08/01/2000
3
GROVE, BRENDEN M.
Exec Dt:
08/01/2000
4
WALTON, IAN C.
Exec Dt:
08/01/2000
5
KOTHARI, MANISH
Exec Dt:
08/03/2000
6
BEHRMANN, LAWRENCE AL.
Exec Dt:
08/03/2000
7
FAYARD, ALFREDO
Exec Dt:
08/03/2000
8
MARKEL, DANIEL C.
Exec Dt:
08/02/2000
9
VORECK, WALLACE E.
Exec Dt:
07/27/2000
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
110 SCHLUMBERGER DRIVE
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6554081
NONE
09620980
Correspondence name and address
SCHLUMBERGER TECHNOLOGY CORPORATION
PO BOX 1590
PATENT COUNSEL
ROSHARON, TEXAS 77583-1590
Assignment: 7
Reel/Frame:011380/0432   Pages: 5
Recorded: 12/04/2000
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
YANG, WENBO
Exec Dt:
11/01/2000
2
GROVE, BRENDEN M.
Exec Dt:
11/01/2000
3
BEHRMANN, LAWRENCE A.
Exec Dt:
11/01/2000
4
FAYARD, ALFREDO
Exec Dt:
11/01/2000
5
MARKEL, DANIEL C.
Exec Dt:
11/01/2000
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
14910 AIRLINE ROAD
ROSHARON, TEXAS 77583
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6520258
NONE
09621159
Correspondence name and address
SCHLUMBERGER TECHNOLOGY CORPORATION
JAIME A. CASTANO
ATTN: PATENT COUNSEL
P.O. BOX 1590
ROSHARON, TX 77583-1590
Assignment: 8
Reel/Frame:011380/0441   Pages: 7
Recorded: 12/04/2000
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
BROOKS, JAMES E.
Exec Dt:
11/01/2000
2
ZIMMERMAN, THOMAS H.
Exec Dt:
11/01/2000
3
MARKEL, DANIEL C.
Exec Dt:
11/01/2000
4
YANG, WENBO
Exec Dt:
11/01/2000
5
SHELTON, JAMES F.
Exec Dt:
11/01/2000
6
VORECK, WALLACE E.
Exec Dt:
11/01/2000
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
14910 AIRLINE ROAD
ROSHARON, TEXAS 77583
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6386109
NONE
09621158
Correspondence name and address
SCHLUMBERGER TECHNOLOGY CORPORATION
JAIME A. CASTANO
PATENT COUNSEL
P.O.BOX 1590
ROSHARON, TEXAS 77583-1590
Assignment: 9
Reel/Frame:013033/0359   Pages: 4
Recorded: 06/26/2002
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
PARROTT, ROBERT A.
Exec Dt:
06/19/2002
2
MARKEL, DANIEL C.
Exec Dt:
06/19/2002
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
300 SCHLUMBERGER
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6702039
US20030029639
10108406
Correspondence name and address
SCHLUMBERGER TECHNOLOGY CORPORATION
JEFFREY E. GRIFFIN
PATENT COUNSEL
P.O. BOX 1590
ROSHARON, TEXAS 77583-1590
Assignment: 10
Reel/Frame:014390/0011   Pages: 4
Recorded: 03/04/2004
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MARKEL, DANIEL C.
Exec Dt:
03/04/2004
2
PHILLIPS, LARRY W.
Exec Dt:
03/04/2004
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
300 SCHLUMBERGER DRIVE
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
7197985
US20050178550
10708220
Correspondence name and address
SCHLUMBERGER RESERVOIR COMPLETIONS
14910 AIRLINE ROAD
P.O. BOX 1590
ROSHARON, TX 77583-1590
Assignment: 11
Reel/Frame:014710/0310   Pages: 4
Recorded: 05/13/2004
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
RATANASIRIGULCHAI, WANCHAI
Exec Dt:
05/08/2004
2
MARKEL, DANIEL C.
Exec Dt:
04/30/2004
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
300 SCHLUMBERGER DRIVE
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
US20050247450
10709491
Correspondence name and address
SCHLUMBERGER RESERVOIR COMPLETIONS
14910 AIRLINE ROAD
P.O. BOX 1590
ROSHARON, TX 77583-1590
Assignment: 12
Reel/Frame:016507/0621   Pages: 7
Recorded: 09/08/2005
Attorney Dkt #:68.0592
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MARKEL, DANIEL C.
Exec Dt:
09/07/2005
2
ANDERSON, RODGER
Exec Dt:
09/07/2005
3
LUHT, RICHARD
Exec Dt:
09/07/2005
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
300 SCHLUMBERGER DRIVE
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
7347261
US20070051512
11162372
Correspondence name and address
SCHLUMBERGER RESERVOIR COMPLETIONS
14910 AIRLINE ROAD
ROSHARON, TX 77583
Assignment: 13
Reel/Frame:016711/0431   Pages: 9
Recorded: 11/01/2005
Attorney Dkt #:22.1568
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MCKINNON, RUSSELL
Exec Dt:
10/12/2005
2
MARKEL, DANIEL C.
Exec Dt:
10/11/2005
3
BROOKS, JAMES E.
Exec Dt:
10/11/2005
4
RYTLEWSKI, GARY L.
Exec Dt:
10/11/2005
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
300 SCHLUMBERGER DRIVE
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
7413015
US20070044968
11161937
Correspondence name and address
SCHLUMBERGER RESERVOIR COMPLETIONS
14910 AIRLINE ROAD
ROSHARON, TX 77583
Assignment: 14
Reel/Frame:043362/0444   Pages: 6
Recorded: 08/23/2017
Attorney Dkt #:IS15.1341-US-NP
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MARKEL, DANIEL C.
Exec Dt:
08/22/2017
2
LEONARDI, TAUNA LEA
Exec Dt:
05/10/2017
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
300 SCHLUMBERGER DRIVE
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
10648263
US20180171744
15383768
Correspondence name and address
KRISTINE DUMAS-SCARBER
10001 RICHMOND AVENUE
ROOM 4720
HOUSTON, TX 77042
Assignment: 15
Reel/Frame:043362/0462   Pages: 6
Recorded: 08/23/2017
Attorney Dkt #:IS15.1340-US-NP
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MARKEL, DANIEL C.
Exec Dt:
08/22/2017
2
LEONARDI, TAUNA LEA
Exec Dt:
05/10/2017
Assignee
1
SCHLUMBERGER TECHNOLOGY CORPORATION
300 SCHLUMBERGER DRIVE
SUGAR LAND, TEXAS 77478
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
US20180171743
15383676
Correspondence name and address
KRISTINE DUMAS-SCARBER
10001 RICHMOND AVENUE
ROOM 4720
HOUSTON, TX 77042

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