US3185200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber with hollow duct and means to recirculate combustion products therearound
Assignee: Silent Glow Oil Burner Corp
•
Filing: 1964-06-16
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Granted: 1965-05-25
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Expires: 1984-06-16
Abstract
No abstract record available.
Inventors
- 👤 Rallston M Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:04
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/0005; F24H9/001; F24H9/0026; F22; F22B; F22B9/00; F22B9/02; F22B9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1383720A
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US1617609A
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US1702482A
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US1986201A
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US1948214A
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US2149182A
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US2177225A
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US2299154A
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US2252319A
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US2401836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |