US2687803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the electrostatic separation of corn from its impurities
Assignee: Quaker Oats Co
•
Filing: 1950-04-17
•
Granted: 1954-08-31
•
Expires: 1970-04-17
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:24
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/02; B03C7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2548771A
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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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |