US2670802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reviving or increasing the production of clogged or congested oil wells
Assignee: THERMACTOR Co
•
Filing: 1949-12-16
•
Granted: 1954-03-02
•
Expires: 1969-12-16
Abstract
No abstract record available.
Inventors
- 👤 Charles S Ackley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:16
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/2401
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1726041A
Cited
US1354757A
Cited
US1433871A
Cited
US1648242A
Cited
US2134610A
Cited
US2472445A
Cited
US2444756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |