Patent US4280583A successfully refreshed from Google Patents.
Patent US2733285A successfully refreshed from Google Patents.
US2733285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of hydrocarbons from highly
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:57
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C10; C10G; C10G53/00; C10G53/02; C10G53/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2636056A
Cited
US2222128A
Cited
US2232761A
Cited
US2400802A
Cited
US2366570A
Cited
US2400355A
Cited
US2414651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |