Yeldell; Stephen Allen
Patent Applications and Registrations
Patent applications and USPTO patent grants for Yeldell; Stephen Allen.The latest application filed is for "buoyancy assist tool".
- Yeldell; Stephen Allen - Golden CO
- Yeldell; Stephen Allen - Humble TX
| Patent | Date |
|---|---|
| Downhole apparatus Grant 11,346,171 - Yuan , et al. May 31, 2 | 2022-05-31 |
| Buoyancy assist tool Grant 11,293,261 - Yuan , et al. April 5, 2 | 2022-04-05 |
| Buoyancy assist tool Grant 11,293,260 - Dharne , et al. April 5, 2 | 2022-04-05 |
| Threadless float equipment and method Grant 11,242,720 - Santoso , et al. February 8, 2 | 2022-02-08 |
| Full bore buoyancy assisted casing system Grant 11,199,071 - Helms , et al. December 14, 2 | 2021-12-14 |
| Buoyancy Assist Tool App 20210363858 - Yuan; Min Mark ; et al. | 2021-11-25 |
| Downhole Apparatus App 20210355776 - Yuan; Min Mark ; et al. | 2021-11-18 |
| Buoyancy Assist Tool App 20210332667 - DHARNE; Avinash Gopal ; et al. | 2021-10-28 |
| Threadless Float Equipment And Method App 20210246746 - Santoso; Handoko Tirto ; et al. | 2021-08-12 |
| Full Bore Buoyancy Assisted Casing System App 20200284121 - Helms; Lonnie Carl ; et al. | 2020-09-10 |
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