Patent US3253769A successfully refreshed from Google Patents.
US2525987A
Expired / Lapsed
US
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Rotary doughnut cutter
Assignee: Individual
•
Filing: 1947-09-29
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Granted: 1950-10-17
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Expires: 1967-09-29
Abstract
No abstract record available.
Inventors
- 👤 Williamson Sophus Adolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:59
CPC Classifications
A; A21; A21C; A21C11/00; A21C11/002; A21C11/10; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/21; Y10T83/2105; Y10T83/2107; Y10T83/2109; Y10T83/2122; Y10T83/2124; Y10T83/2131; Y10T83/465; Y10T83/4766; Y10T83/4795
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |