Patent Assignment Abstract of Title
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Total Assignments:
1
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Patent #:
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Issue Dt:
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07/06/2021
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Application #:
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16196511
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Filing Dt:
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11/20/2018
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Publication #:
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Pub Dt:
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04/16/2020
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Inventors:
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Yuping Yang, Jingping Liu, Min Chang, Long Li, Jinhong Wang, Yan Zhang, Jinsheng Sun
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Title:
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TEMPERATURE-RESISTANT CALCIUM-RESISTANT WATER-BASED DRILLING FLUID FOR OIL AND GAS RESERVOIR PROTECTION AND USE THEREOF
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Assignment:
1
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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| BLDG. 1, YARD 5, HUANGHE STREET, |
| CHANGPING DISTRICT |
| BEIJING, CHINA 102206 |
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| NO. 66, CHANGJIANG WEST ROAD, HUANGDAO DISTRICT |
| SHANDONG PROVINCE |
| QINGDAO, CHINA 266580 |
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| VOLPE AND KOENIG, P.C. |
| DUANE MORRIS PLAZA |
| 30 SOUTH 17TH STREET, 18TH FLOOR |
| PHILADELPHIA, PA 19103 |
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