Patent US2536185A successfully refreshed from Google Patents.
US2536185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue cleaning brush with resilient radial scraping bristles
Assignee: Individual
•
Filing: 1945-12-14
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Granted: 1951-01-02
•
Expires: 1965-12-14
Abstract
No abstract record available.
Inventors
- 👤 Johnson Wilmar Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:53
CPC Classifications
F; F23; F23J; F23J3/00; F23J3/02; F23J3/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US202361A
Cited
US544908A
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US1888593A
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US1837931A
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DE565182C
Cited
US2021768A
Cited
US1964057A
Cited
US2224412A
Cited
US2332490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |