US1656820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine
Assignee: WORCESTER STEEL PRODUCTS Co
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Filing: 1923-05-04
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Granted: 1928-01-17
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Expires: 1943-05-04
Abstract
No abstract record available.
Inventors
- 👤 Warren F Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:46
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/18; B24B5/22; B24B5/225; B24B37/00; B24B37/02; B24B37/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-01-16 | 1931-07-18 | 1932-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-16 | 1935-07-18 | 1936-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-16 | 1939-07-18 | 1940-01-17 | $7700.00 | Window Closed / Lapsed |