Patent US2789296A successfully refreshed from Google Patents.
US2789296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue cleaning apparatus
Assignee: Individual
•
Filing: 1954-07-15
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Granted: 1957-04-23
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Expires: 1974-07-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Cheadle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:45
CPC Classifications
F; F23; F23J; F23J3/00; F23J3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US270979A
Cited
US473821A
Cited
US690878A
Cited
US1268911A
Cited
US1475989A
Cited
US1661931A
Cited
US2193999A
Cited
US2343890A
Cited
US2604358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |