Bionic and dual-phobic high-performance water-based drilling fluid
US-11787990-B2 · Oct 17, 2023 · US
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Chen Changwei patents
Chen Changwei is listed as an inventor on 2 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Chen Changwei |
| Total patents | 2 |
| First publication | May 4, 2023 |
| Latest publication | Oct 17, 2023 |
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Recent patents
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Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Univ China Petroleum Beijing | 2 |
| Cnpc Chuanqing Drilling Eng Co | 2 |
| Cnpc Eng Tech Res & Dev Co Ltd | 2 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| C09K8/206 | 2 |
| C09K2208/12 | 2 |
| C09K2208/10 | 2 |
| C09K2208/34 | 2 |
| C09K8/24 | 2 |