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US2707852A
Expired / Lapsed
US
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Knife sharpener
Assignee: John Oster Manufacturing Co
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Filing: 1951-07-07
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Granted: 1955-05-10
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Expires: 1971-07-07
Abstract
No abstract record available.
Inventors
- 👤 Marcellus I Fillweber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:44
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/36; B24B3/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US977624A
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US1375343A
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GB284010A
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US1788634A
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US1925108A
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GB417928A
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US2124593A
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US2228385A
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US2259554A
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FR981178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |