US2684561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding mechanism
Assignee: Daco Inc
•
Filing: 1952-02-12
•
Granted: 1954-07-27
•
Expires: 1972-02-12
Abstract
No abstract record available.
Inventors
- 👤 Robert F Lindgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:15
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/36; B24B3/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1439711A
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US688505A
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US1370964A
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US1417228A
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US1633085A
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US1860211A
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US2431939A
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US2464660A
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US2555048A
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US2563541A
Cited
US2573377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |