Patent Assignment Details
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For pending or abandoned applications please consult USPTO staff.
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| Reel/Frame: | 044605/0537 | |
| Pages: | 7 |
| | Recorded: | 01/12/2018 | | |
| Attorney Dkt #: | 212033-0002-US01 |
| 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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05/05/2020
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Application #:
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15744129
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Filing Dt:
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01/12/2018
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Publication #:
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Pub Dt:
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07/19/2018
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Title:
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MECHANICAL AND HYDRAULIC DUAL-EFFECT EXPANSION DEVICE FOR WELL DRILLING WITH EXPANDABLE TUBULAR TECHNOLOGY
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Assignees
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| 9 DONGZHIMEN NORTH STREET, DONGCHENG DISTRICT |
| BEIJING, CHINA |
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| A34 PLOTS, CHINA PETROLEUM INNOVATION BASE, XISHATUN BRIDGE WEST, SHAHE TOWN, CHANGPING DISTRICT |
| BEIJING, CHINA 102206 |
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Correspondence name and address
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MICHAEL BEST & FRIEDRICH LLP (MKE)
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100 E WISCONSIN AVENUE
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SUITE 3300
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MILWAUKEE, WI 53202
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