Patent US2800755A successfully refreshed from Google Patents.
US2800755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill sharpener
Assignee: Individual
•
Filing: 1955-03-14
•
Granted: 1957-07-30
•
Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Perra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:40
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/26; B24B3/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US282364A
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US1497951A
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US1508939A
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US1994975A
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US2078306A
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US2591893A
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US2305230A
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US2491565A
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US2512888A
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US2601748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |