Patent US2857111A successfully refreshed from Google Patents.
US2857111A
Expired / Lapsed
US
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Rotor blades and blade mounting means for grinding mills
Assignee: UNIPULVER Ltd
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Filing: 1956-01-18
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Granted: 1958-10-21
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Expires: 1976-01-18
Abstract
No abstract record available.
Inventors
- 👤 Clark Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
B; B02; B02C; B02C4/00; B02C4/28; B02C4/30; B02C4/305; B02C13/00; B02C13/26; B02C13/28; B02C13/2804; B02C18/00; B02C18/06; B02C18/16; B02C18/18; B02C18/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US122028A
Cited
US499083A
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US669048A
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DE326109C
Cited
US1396108A
Cited
US1494036A
Cited
GB569122A
Cited
US2552037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |