US2743557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically driven abrading devices
Assignee: Individual
•
Filing: 1951-01-10
•
Granted: 1956-05-01
•
Expires: 1971-01-10
Abstract
No abstract record available.
Inventors
- 👤 Alice R Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:20
CPC Classifications
B; B24; B24B; B24B23/00; B24B23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2123426A
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US2328613A
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US2307431A
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US2345383A
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US2395537A
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US2437152A
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US2526976A
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US2493226A
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US2582470A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |