US3476649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonisation of solid fuels
Assignee: INST NAT de l IND CHARBONNIERE
•
Filing: 1965-04-09
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Granted: 1969-11-04
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Expires: 1985-04-09
Abstract
No abstract record available.
Inventors
- 👤 Pierre Leon Victor Ledent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:24
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/36; C; C10; C10B; C10B49/00; C10B49/16; C10B49/20; C10B49/22; C10B53/00; C10B53/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE503199A
Cited
US2064715A
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US2638219A
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US2835554A
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US3085947A
Cited
US2776935A
Cited
US3020209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |