Patent US2437329A successfully refreshed from Google Patents.
US2581522A
Expired / Lapsed
US
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Stoker control apparatus
Assignee: Honeywell Inc
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Filing: 1948-05-24
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Granted: 1952-01-08
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Expires: 1968-05-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Donna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:48
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/14; F23N5/143; F23N2223/00; F23N2223/16; F23N2225/00; F23N2225/08; F23N2225/12; F23N2229/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |