US2758636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demountable burner
Assignee: American Air Filter Co Inc
•
Filing: 1952-04-04
•
Granted: 1956-08-14
•
Expires: 1972-04-04
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:55
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F23; F23C; F23C99/00; F23C2700/00; F23C2700/02; F23C2700/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1324607A
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US807286A
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US910024A
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US1062042A
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US1558349A
Cited
US1391338A
Cited
CH198370A
Cited
US2451623A
Cited
US2386807A
Cited
US2537054A
Cited
US2548904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |