US3375870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of petroleum by thermal methods
Assignee: Pan American Petroleum Corp
•
Filing: 1965-11-19
•
Granted: 1968-04-02
•
Expires: 1985-11-19
Abstract
No abstract record available.
Inventors
- 👤 Satter Abdus
- 👤 Jr Forrest F Craig
- 👤 Theodore M Geffen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:06
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2813583A
Cited
US2876838A
Cited
US3026937A
Cited
US3167120A
Cited
US3149670A
Cited
US3237692A
Cited
US3280909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |