US2949921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paint brush cleaner
Assignee: Individual
•
Filing: 1958-05-12
•
Granted: 1960-08-23
•
Expires: 1978-05-12
Abstract
No abstract record available.
Inventors
- 👤 Calvin E Boland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:49
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1238976A
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US1531017A
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US1414902A
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GB384646A
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US1958846A
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US1956986A
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US2278650A
Cited
US2449818A
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US2416475A
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GB632900A
Cited
US2633995A
Cited
US2580625A
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US2744635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |