Patent US2968472A successfully refreshed from Google Patents.
US2968472A
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US
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Assignee: Winkel Machine Co Inc
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Filing: 1958-04-23
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Granted: 1961-01-17
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Expires: 1978-04-23
Abstract
No abstract record available.
Inventors
- 👤 Donald K Barnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:22
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/46; B28C5/462; B01; B01F; B01F29/00; B01F29/80; B01F29/83
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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |