Patent US3146175A successfully refreshed from Google Patents.
US3146175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal processing oven and product recovery system
Assignee: Individual
•
Filing: 1960-06-06
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Granted: 1964-08-25
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Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Mansfield Vaughn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:39
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB188693A
Cited
US1839741A
Cited
US1591023A
Cited
US1814463A
Cited
US1639356A
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US2131702A
Cited
US2209255A
Cited
US2380930A
Cited
US2668760A
Cited
US2710828A
Cited
US3013951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |