US3020783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain saw sharpener
Assignee: Individual
•
Filing: 1958-12-08
•
Granted: 1962-02-13
•
Expires: 1978-12-08
Abstract
No abstract record available.
Inventors
- 👤 Emil H Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:13
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/08; B23D63/12; B23D63/14; B23D63/16; B23D63/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1874315A
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DE889253C
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US2459233A
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US2602354A
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US2656738A
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US2643553A
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US2805587A
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US2764043A
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US2793544A
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US2921484A
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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) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |