Patent US2846935A successfully refreshed from Google Patents.
US2846935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue breather
Assignee: Individual
•
Filing: 1956-02-16
•
Granted: 1958-08-12
•
Expires: 1976-02-16
Abstract
No abstract record available.
Inventors
- 👤 August J Still
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:18
CPC Classifications
F; F23; F23L; F23L11/00; F23L11/02; F23L13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US218596A
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US501253A
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US773723A
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US1186303A
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US1470930A
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US2052315A
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US2350771A
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US2297892A
Cited
US2347895A
Cited
US2565122A
Cited
US2473804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |