Patent US3039695A successfully refreshed from Google Patents.
US2523656A
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US
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Combustion apparatus comprising successive combustion chambers
Assignee: DANIEL AND FLORENCE GUGGENHEIM
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Filing: 1947-11-01
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Granted: 1950-09-26
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Expires: 1967-11-01
Abstract
No abstract record available.
Inventors
- 👤 Esther C Goddard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/60; F02K9/62; Y; Y10; Y10S; Y10S60/00; Y10S60/915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190807701A
Cited
FR522163A
Cited
US1372121A
Cited
US1828784A
Cited
GB254966A
Cited
US1879186A
Cited
US2396567A
Cited
US2408111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |