US2550168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mill for the fine grinding of granular materials
Assignee: OSTRAVSKE CHEMICKE ZAVODY NARODNI PODNIK
•
Filing: 1948-06-26
•
Granted: 1951-04-24
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Expires: 1968-06-26
Abstract
No abstract record available.
Inventors
- 👤 Smid Otakar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:29
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/14; B02C13/18; B02C13/1807
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1697704A
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US1724041A
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US1875817A
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US1955960A
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US2304264A
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US2434037A
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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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |