Patent US2504487A successfully refreshed from Google Patents.
US2504487A
Expired / Lapsed
US
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Continuous flow paintbrush
Assignee: Individual
•
Filing: 1947-11-03
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Granted: 1950-04-18
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Expires: 1967-11-03
Abstract
No abstract record available.
Inventors
- 👤 Robert F Anson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:27
CPC Classifications
A; A46; A46B; A46B11/00; A46B11/06; A46B11/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US664791A
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US821879A
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US1342211A
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US1572362A
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US1770033A
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AU2839430A
Cited
US2041173A
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US2160043A
Cited
US2227792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |