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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02/27/2018
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Application #:
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15635997
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Filing Dt:
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06/28/2017
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Publication #:
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Pub Dt:
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03/01/2018
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Inventors:
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Guancheng JIANG, Yinbo HE, Chong LIU, Qingying GE, Lili YANG, Yong WANG, Yongqing ZHANG et al
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Title:
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Drilling Fluid Additive Composition Suitable for Coal-Bed Gas Wells, and Water-Based Drilling Fluid 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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| NO.18 FUXUE ROAD |
| CHANGPING DISTRICT, BEIJING, CHINA |
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| CALFEE HALTER & GRISWOLD LLP |
| THE CALFEE BUILDING, 1405 EAST SIXTH STREET |
| CLEVELAND, OH 44114 |
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