Patent US2656799A successfully refreshed from Google Patents.
US2656799A
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Control system for automatically fed furnaces for solid organic fuels
Assignee: Bituminous Coal Research Inc
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Filing: 1949-09-09
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Granted: 1953-10-27
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Expires: 1969-09-09
Abstract
No abstract record available.
Inventors
- 👤 Willard J Hatton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:28
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/24; F24H1/26; F24H1/28; F23; F23N; F23N1/00; F23N1/005; F24H2230/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1567869A
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US1548292A
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US1539257A
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US1996230A
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US2104883A
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US2103913A
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US2180196A
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US2490855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |