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US2481878A
Expired / Lapsed
US
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Ash trap
Assignee: Individual
•
Filing: 1946-12-16
•
Granted: 1949-09-13
•
Expires: 1966-12-16
Abstract
No abstract record available.
Inventors
- 👤 Albert P Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:14
CPC Classifications
F; F24; F24B; F24B13/00; F24B13/006; F24B13/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US277718A
Cited
US375969A
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US988372A
Cited
US1111016A
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US1385541A
Cited
US1525711A
Cited
US2166291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |