Patent US2175531A successfully refreshed from Google Patents.
US2175531A
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Automatic corn popper
Assignee: RUDOLPH GREENBAUM
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Filing: 1938-03-07
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Granted: 1939-10-10
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Expires: 1958-03-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert E Kortum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:29
CPC Classifications
G; G07; G07F; G07F17/00; G07F17/0064; G07F17/0078; A; A47; A47J; A47J37/00; A47J37/12; A47J37/1228; G07F9/00; G07F9/10; G07F9/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-10-09 | 1943-04-10 | 1943-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-09 | 1947-04-10 | 1947-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-09 | 1951-04-10 | 1951-10-10 | $7700.00 | Window Closed / Lapsed |