US3043752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of low and high temperature fluidized carbonization of coal
Assignee: Charbonnages de France CDF
•
Filing: 1958-10-02
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Granted: 1962-07-10
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Expires: 1978-10-02
Abstract
No abstract record available.
Inventors
- 👤 Foch Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:47
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/08; C10B49/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2131702A
Cited
US2582712A
Cited
US2626234A
Cited
US2618589A
Cited
US2710828A
Cited
US2807571A
Cited
US2955077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |