Daqing Oilfield Co., Ltd.
Patent Owner
Stats
- 4 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Jun 24, 2014 most recent publication
Details
- 4 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 12 Total Citation Count
- Jun 20, 2005 Earliest Filing
- 0 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
Patent #
Title
Filing Date
Issue Date
Intl Class
8757257 Crown-shaped separation device for separating oil and water in wellSep 09, 13Jun 24, 14[E21B]
Expired/Abandoned/Withdrawn Patents
- No Patents to Display
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