US2426946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal cleaner for winnowing and screening grain
Assignee: Individual
•
Filing: 1944-06-03
•
Granted: 1947-09-02
•
Expires: 1964-06-03
Abstract
No abstract record available.
Inventors
- 👤 August F Pfingsten
- 👤 Sam J Slotsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:33
CPC Classifications
B; B07; B07B; B07B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US440634A
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US442212A
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US492720A
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US884551A
Cited
DE452830C
Cited
US2046442A
Cited
US2044628A
Cited
US2099505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |