US3428172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic potato separator
Assignee: CARL C HOFFMAN
•
Filing: 1966-08-22
•
Granted: 1969-02-18
•
Expires: 1986-08-22
Abstract
No abstract record available.
Inventors
- 👤 Carl C Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:41
CPC Classifications
A; A01; A01D; A01D33/00; A01D33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2294086A
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US2257552A
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US2499037A
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US2535801A
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US2717077A
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US2717076A
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US2762506A
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US2900068A
Cited
US3227276A
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US3358830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |