Patent US1820047A successfully refreshed from Google Patents.
Patent US2452843A successfully refreshed from Google Patents.
US2452843A
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Combustion apparatus for solid combustibles in fragments
Assignee: SPLADIS SOC POUR L APPLIC D IN
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Filing: 1944-02-17
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Granted: 1948-11-02
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Expires: 1964-02-17
Abstract
No abstract record available.
Inventors
- 👤 Esnault-Pelterie Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:01
CPC Classifications
F; F23; F23B; F23B50/00; F23B50/02; F23B5/00; F23B90/00; F23B90/04; F23L; F23L9/00; F23B2700/00; F23B2700/009; F23B2700/011; F23B2700/022
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) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |