US2824701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for multiple stage wet grinding
Assignee: FLSmidth and Co AS
•
Filing: 1952-11-21
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Granted: 1958-02-25
•
Expires: 1972-11-21
Abstract
No abstract record available.
Inventors
- 👤 Vester Borge
- 👤 Olsen Tage Bent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:46
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/0007; B02; B02C; B02C25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1619807A
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US2491466A
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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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |