Patent US5249303A successfully refreshed from Google Patents.
Patent US2606010A successfully refreshed from Google Patents.
US2606010A
Expired / Lapsed
US
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Mechanized production of solid fuel
Assignee: Consolidation Coal Co
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Filing: 1945-10-29
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Granted: 1952-08-05
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Expires: 1965-10-29
Abstract
No abstract record available.
Inventors
- 👤 Frank A Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:36
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US957364A
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US1011994A
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US1191864A
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GB182860A
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US1603621A
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US1999261A
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US2064660A
Cited
US2118490A
Cited
US2269781A
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US2375689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |