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Patent US2712416A successfully refreshed from Google Patents.
US2712416A
Expired / Lapsed
US
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Centrifugal grinding mills
Assignee: Alpine AG
•
Filing: 1951-04-19
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Granted: 1955-07-05
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Expires: 1971-04-19
Abstract
No abstract record available.
Inventors
- 👤 Beushausen Walter
- 👤 Rumpf Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:28
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1734661A
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US1752902A
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US1885251A
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US2033757A
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US2199015A
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US2561043A
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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) | 1958-07-04 | 1959-01-03 | 1959-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-04 | 1963-01-03 | 1963-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-04 | 1967-01-03 | 1967-07-05 | $7700.00 | Window Closed / Lapsed |