Patent US3573617A successfully refreshed from Google Patents.
US2270579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning device
Assignee: Individual
•
Filing: 1939-05-19
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Granted: 1942-01-20
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Expires: 1959-05-19
Abstract
No abstract record available.
Inventors
- 👤 John W Chamberlin
- 👤 Jr Rex Earl Bassett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:28
CPC Classifications
A; A47; A47L; A47L1/00; A47L1/02; B; B05; B05B; B05B1/00; B05B1/28; B05B14/00; B05B14/30; B05B7/00; B05B7/02; B05B7/06; B05B7/062; B05B7/066
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) | 1945-01-19 | 1945-07-21 | 1946-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-19 | 1949-07-21 | 1950-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-19 | 1953-07-21 | 1954-01-20 | $7700.00 | Window Closed / Lapsed |