US2906680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of petroleum
Assignee: Union Carbide Corp
•
Filing: 1956-02-10
•
Granted: 1959-09-29
•
Expires: 1976-02-10
Abstract
No abstract record available.
Inventors
- 👤 Simon L Ruskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:38
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; B; B01; B01J; B01J19/00; B01J19/08; B01J19/081; B01J19/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1627938A
Cited
US1897617A
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US1961493A
Cited
US2350330A
Cited
US2743223A
Cited
US2710925A
Cited
US2684447A
Cited
US2700111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |