US3539293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating a fluidized bed of pulverulent material with hot combustion gases
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1966-11-22
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Granted: 1970-11-10
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Expires: 1986-11-22
Abstract
No abstract record available.
Inventors
- 👤 Michel Boucraut
- 👤 Imre Toth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:19
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1818; B01J8/1827; B01J8/1836; F; F27; F27B; F27B15/00; F27B15/02; F27B15/10; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00477; B01J2208/00495; B01J2208/00504; B01J2208/0053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |