Patent US1992452A successfully refreshed from Google Patents.
US1992452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for grinding springs
Assignee: W D GIBSON CO
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Filing: 1930-06-16
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Granted: 1935-02-26
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Expires: 1950-06-16
Abstract
No abstract record available.
Inventors
- 👤 Harry P Troendly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:54
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24B7/16; B24B7/167
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) | 1938-02-25 | 1938-08-27 | 1939-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-25 | 1942-08-27 | 1943-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-25 | 1946-08-27 | 1947-02-26 | $7700.00 | Window Closed / Lapsed |