Patent US5292332A successfully refreshed from Google Patents.
US3660269A
Expired / Lapsed
US
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Coal processing
Assignee: Atlantic Richfield Co
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Filing: 1970-10-14
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Granted: 1972-05-02
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Expires: 1990-10-14
Abstract
Abstract A COAL HYDROGENATION PROCESS CARRIED OUT IN THE ABSENCE OF HYDROGENATION CATALYST AND IN THE PRESENCE OF WATER.
Inventors
- 👤 John C Mccauley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:32
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/06; C10G1/065; Y; Y10; Y10S; Y10S208/00; Y10S208/952
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 |