Patent US3064393A successfully refreshed from Google Patents.
US3064393A
Expired / Lapsed
US
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Automatic knife sharpener
Assignee: Individual
•
Filing: 1960-03-08
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Granted: 1962-11-20
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Expires: 1980-03-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Chasan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:56
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/36; B24B3/54; B24B35/00
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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |