US3660267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal processing
Assignee: Atlantic Richfield Co
•
Filing: 1970-10-14
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Granted: 1972-05-02
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Expires: 1990-10-14
Abstract
Abstract A METHOD FOR HYDROGENATING COAL TO AT LEAST PARTIALLY LIQUIFY SAME WHEREIN THE HYDROGENATION IS CARRIED OUT IN AT LEAST ONE ZONE CONTAINING AN EBULLATED BED OF SUBSTANTIALLY INERT, SOLID CONTACT PARTICLES.
Inventors
- 👤 Robert W Rieve
- 👤 Harold Shalit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:43
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/06; C10G1/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |