Patent US2290533A successfully refreshed from Google Patents.
US2290533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon cleaning brush
Assignee: Individual
•
Filing: 1942-03-24
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Granted: 1942-07-21
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Expires: 1962-03-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis Kavanaugh Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:41
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4038; A47L11/02; A47L11/20; A47L11/204; A47L11/206; A47L11/2065; A47L11/4044; F; F02; F02B; F02B77/00; F02B77/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-07-20 | 1946-01-19 | 1946-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-20 | 1950-01-19 | 1950-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-20 | 1954-01-19 | 1954-07-21 | $7700.00 | Window Closed / Lapsed |