US2638975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber for gaseous fuels
Assignee: Individual
•
Filing: 1948-04-23
•
Granted: 1953-05-19
•
Expires: 1968-04-23
Abstract
No abstract record available.
Inventors
- 👤 Michael F Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:48
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US345825A
Cited
US547473A
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US1379538A
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US1414360A
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US1466014A
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US1582634A
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US1851745A
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US1741584A
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US1919285A
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US1962756A
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US2183836A
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US2275555A
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US2362972A
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US2287246A
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US2429022A
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US2427545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |