US3036640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically adjustable tubing anchor
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1958-07-11
•
Granted: 1962-05-29
•
Expires: 1978-07-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Earnest H Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:30
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/01
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2379394A
Cited
US2756827A
Cited
US2751012A
Cited
US2765855A
Cited
US2802534A
Cited
US2841225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |