Patent US2674375A successfully refreshed from Google Patents.
US2674375A
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Reversible flour sifter having a discharge valve
Assignee: ROCKFORD INVENTORS Inc
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Filing: 1951-07-23
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Granted: 1954-04-06
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Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Howard W Clay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:06
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |