Patent US2965990A successfully refreshed from Google Patents.
US2965990A
Expired / Lapsed
US
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Automatic control mechanism for grading apparatus
Assignee: Preco LLC
•
Filing: 1956-07-13
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Granted: 1960-12-27
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Expires: 1976-07-13
Abstract
No abstract record available.
Inventors
- 👤 Donald D Colee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:10
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7636; E02F3/765; E02F3/80; E02F3/84; E02F3/844; E02F3/845; Y; Y10; Y10S; Y10S37/00; Y10S37/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1936518A
Cited
US2552890A
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US2502217A
Cited
US2647323A
Cited
US2636290A
Cited
US2755721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |