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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04/09/2019
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Application #:
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16130694
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Filing Dt:
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09/13/2018
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Publication #:
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Pub Dt:
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03/21/2019
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Inventors:
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Guancheng JIANG, Shuo ZHANG, Xianzhu WU, Xiangzeng WANG, Yinbo HE, Hongguo ZUO, Lili YANG et al
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Title:
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FILM FORMER USED FOR COAL-BED GAS WELL DRILLING AND PREPARATION METHOD THEREOF, DRILLING FLUID AND USAGE THEREOF
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Assignment:
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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NO. 18 FUXUE ROAD |
CHANGPING DISTRICT |
BEIJING, CHINA 102249 |
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YIZHOU LIU |
CALFEE, HALTER & GRISWOLD LLP |
1405 EAST SIXTH STREET |
CLEVELAND, OH 44114-1607 |
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