Patent US3430921A successfully refreshed from Google Patents.
US2967947A
Expired / Lapsed
US
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Sheet inspection method and apparatus
Assignee: EIDP Inc
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Filing: 1956-10-04
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Granted: 1961-01-10
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Expires: 1976-10-04
Abstract
No abstract record available.
Inventors
- 👤 Jr William M Flook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:57
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01N21/8901; D; D02; D02H; D02H13/00; D03; D03J; D03J1/00; D03J2700/00; D03J2700/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2246501A
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US2429331A
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US2721942A
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US2640152A
Cited
US2753464A
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US2791931A
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US2806401A
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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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |