Patent US2053647A successfully refreshed from Google Patents.
Patent US3033269A successfully refreshed from Google Patents.
US3033269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel burner air system
Assignee: Cleaver Brooks Co
•
Filing: 1957-07-23
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Granted: 1962-05-08
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Expires: 1977-07-23
Abstract
No abstract record available.
Inventors
- 👤 Glenn D Craig
- 👤 Gething Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:59
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2126417A
Cited
US1743048A
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US1969506A
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US2000733A
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US2090566A
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US2253414A
Cited
US2405196A
Cited
US2502664A
Cited
US2814430A
Cited
US2835320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |