Patent US2818752A successfully refreshed from Google Patents.
US2818752A
Expired / Lapsed
US
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Chain saw sharpening and jointing apparatus
Assignee: NYGRAN IND Ltd
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Filing: 1955-07-01
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Granted: 1958-01-07
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Expires: 1975-07-01
Abstract
No abstract record available.
Inventors
- 👤 Granberg Elof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:27
CPC Classifications
B; B23; B23D; B23D63/00; B23D63/08; B23D63/16; B23D63/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US310735A
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US327774A
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US384829A
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US409866A
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US2736216A
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US1435954A
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US2568062A
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US2594821A
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US2633761A
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US2677289A
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US2693724A
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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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |