US3395657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic fire control for coal fired furnace
Assignee: Combustion Engineering Inc
•
Filing: 1966-08-01
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Granted: 1968-08-06
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Expires: 1986-08-01
Abstract
No abstract record available.
Inventors
- 👤 Jack A Schuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:35
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/08; F23N1/082; F23N1/005; F23N2237/00; F23N2237/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2073346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |