US2946440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyratory sifting machine
Assignee: Orville Simpson Co
•
Filing: 1956-12-17
•
Granted: 1960-07-26
•
Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Lowe E Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:44
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US589929A
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GB189404338A
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GB189818223A
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GB189823671A
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US1980490A
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US2149368A
Cited
GB480003A
Cited
US2226416A
Cited
US2284671A
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GB550661A
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US2540517A
Cited
US2676706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |