Sliding sleeve device
US-11933138-B2 · Mar 19, 2024 · US
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Ci Jianfa patents
Ci Jianfa is listed as an inventor on 2 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Ci Jianfa |
| Total patents | 2 |
| First publication | Oct 5, 2023 |
| Latest publication | Mar 19, 2024 |
Notable patents
Publications ranked by popularity score, then publication date.
Sliding sleeve device
US-2023313641-A1 · Oct 5, 2023 · US
Recent patents
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Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| China Petroleum & Chem Corp | 2 |
| Sinopec Southwest Oil & Gas Co | 2 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| E21B34/14 | 2 |
| E21B43/26 | 2 |
| E21B34/142 | 2 |
| E21B34/063 | 2 |