US2477880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saw sharpening machine
Assignee: ALBERT F PITYO
•
Filing: 1945-06-29
•
Granted: 1949-08-02
•
Expires: 1965-06-29
Abstract
No abstract record available.
Inventors
- 👤 Kershaw Henry
- 👤 Albert F Pityo
- 👤 Butterfield Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:12
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/08; B23D63/12
Claims Analysis
Total Claims: 0
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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) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |