US3415376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flour sifter
Assignee: Washburn Co
•
Filing: 1967-01-20
•
Granted: 1968-12-10
•
Expires: 1987-01-20
Abstract
No abstract record available.
Inventors
- 👤 Mahlon J Smith
- 👤 Richard E Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:13
CPC Classifications
A; A47; A47J; A47J43/00; A47J43/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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CA520810A
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US3043354A
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US3329318A
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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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |