Patent US2658862A successfully refreshed from Google Patents.
US2658862A
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US
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Process for the defluidization and fixed-bed coking of a preheated fluidized coal
Assignee: Reilly Tar and Chemical Corp
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Filing: 1950-06-09
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Granted: 1953-11-10
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Expires: 1970-06-09
Abstract
No abstract record available.
Inventors
- 👤 Harold R Horner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:04
CPC Classifications
C; C10; C10B; C10B31/00; C10B57/00; C10B57/08
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |