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US2457533A
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Assignee: AMF Inc
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Filing: 1945-09-05
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Granted: 1948-12-28
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Expires: 1965-09-05
Abstract
No abstract record available.
Inventors
- 👤 Walter F Dehuff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:20
CPC Classifications
A; A21; A21C; A21C1/00; A21C1/02; B; B01; B01F; B01F27/00; B01F27/80; B01F27/95; B01F35/00; B01F35/30; B01F35/33
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) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |