Patent Assignment Details
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| Reel/Frame: | 016136/0852 | |
| Pages: | 4 |
| | Recorded: | 01/10/2005 | | |
| Conveyance: | ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). |
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Total properties:
1
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Patent #:
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Issue Dt:
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01/02/2007
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Application #:
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10976544
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Filing Dt:
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10/29/2004
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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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AUTOMATIC CONTROL SYSTEM AND METHOD FOR BOTTOM HOLE PRESSURE IN THE UNDERBALANCE DRILLING
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Assignees
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| 6A HUIXIN DONG STREET |
| CHAOYANG DISTRICT |
| BEIJING, CHINA 100029 |
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| NO. 31 XUEYUAN ROAD |
| HAIDIAN DISTRICT |
| BEIDAOBU, CHINA 100083 |
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Correspondence name and address
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MARSHALL, GERSTEIN & BORUN LLP
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JAMES J. NAPOLI
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233 S. WACKER DRIVE, SUITE 6300
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SEARS TOWER
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CHICAGO, IL 60606-6357
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