Patent US3511374A successfully refreshed from Google Patents.
US3511374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening device
Assignee: California and Hawaiian Sugar Co
•
Filing: 1968-11-01
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Granted: 1970-05-12
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Expires: 1988-11-01
Abstract
No abstract record available.
Inventors
- 👤 Clifford W Beal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:29
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/60; B01D29/62; B01D29/66; B01D29/68; B01D29/682; B01D29/88; B01D29/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US851388A
Cited
US1439706A
Cited
US2046770A
Cited
US2796809A
Cited
US2835390A
Cited
US2862622A
Cited
US3034431A
Cited
US3168467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |