Patent Assignment Details
NOTE:Results display only for issued patents and published applications.
For pending or abandoned applications please consult USPTO staff.
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| Reel/Frame: | 020442/0486 | |
| Pages: | 9 |
| | Recorded: | 02/01/2008 | | |
| Conveyance: | ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). |
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Total properties:
11
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Patent #:
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Issue Dt:
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04/19/1994
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Application #:
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07989202
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Filing Dt:
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12/11/1992
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Title:
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RING SEAL PACKER
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Patent #:
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Issue Dt:
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03/18/1997
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Application #:
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08534127
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Filing Dt:
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09/26/1995
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Title:
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TWO-PIECE DRILLING FLANGE
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Patent #:
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Issue Dt:
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03/13/2001
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Application #:
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09274857
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Filing Dt:
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03/23/1999
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Title:
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DRILLING QUICK CONNECTORS
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Patent #:
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Issue Dt:
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04/08/2003
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Application #:
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09798436
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Filing Dt:
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03/02/2001
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Publication #:
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Pub Dt:
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09/05/2002
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Title:
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WELL TUBING ROTATOR
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Patent #:
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Issue Dt:
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07/08/2003
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Application #:
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09954354
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Filing Dt:
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09/17/2001
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Publication #:
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Pub Dt:
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03/20/2003
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Title:
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COIL TUBING HANGER SYSTEM
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Patent #:
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Issue Dt:
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10/02/2012
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Application #:
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10325047
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Filing Dt:
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12/20/2002
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Title:
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DRILLING QUICK CONNECTORS
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Patent #:
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Issue Dt:
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07/26/2005
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Application #:
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10369070
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Filing Dt:
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02/19/2003
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Publication #:
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Pub Dt:
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12/04/2003
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Title:
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WELLHEAD ISOLATION TOOL
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Patent #:
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Issue Dt:
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02/24/2009
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Application #:
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10947778
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Filing Dt:
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09/23/2004
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Publication #:
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Pub Dt:
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05/05/2005
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Title:
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WELLHEAD ISOLATION TOOL AND METHOD OF FRACTURING A WELL
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Patent #:
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Issue Dt:
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01/29/2008
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Application #:
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11272289
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Filing Dt:
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11/09/2005
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Publication #:
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Pub Dt:
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03/23/2006
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Title:
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WELLHEAD ISOLATION TOOL AND METHOD OF FRACTURING A WELL
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Patent #:
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Issue Dt:
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10/30/2012
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Application #:
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11581229
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Filing Dt:
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10/12/2006
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Title:
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DRILLING QUICK CONNECTORS
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Patent #:
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Issue Dt:
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08/26/2008
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Application #:
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11891431
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Filing Dt:
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08/09/2007
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Publication #:
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Pub Dt:
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11/29/2007
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Title:
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WELLHEAD ISOLATION TOOL, WELLHEAD ASSEMBLY INCORPORATING THE SAME, AND METHOD OF FRACTURING A WELL
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Assignee
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| 500 W. MADISON |
| CHICAGO, ILLINOIS 60661 |
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Correspondence name and address
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LAURA KONRATH
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WINSTON & STRAWN, LLP
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35 W. WACKER DR.
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CHICAGO, IL 60601
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