US2597421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrading unit
Assignee: Individual
•
Filing: 1949-05-17
•
Granted: 1952-05-20
•
Expires: 1969-05-17
Abstract
No abstract record available.
Inventors
- 👤 Edwin H White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:44
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/02; B24D13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US674384A
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US1670068A
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US1794092A
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US2076311A
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US2103320A
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US2174546A
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US2316257A
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US2423992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |