US2657504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed mechanism for grinding machines
Assignee: Gardner Machine Co
•
Filing: 1949-11-09
•
Granted: 1953-11-03
•
Expires: 1969-11-09
Abstract
No abstract record available.
Inventors
- 👤 Harold O Cadman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:31
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24B7/16; B24B7/162; B24B41/00; B24B41/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |