US2670139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening discharge device for rod and ball mills
Assignee: Monolith Portland Cement Co
•
Filing: 1950-05-29
•
Granted: 1954-02-23
•
Expires: 1970-05-29
Abstract
No abstract record available.
Inventors
- 👤 Treshow Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:11
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/183; B02C17/1835; B02C17/1855; B02C17/04; B02C17/184; B02C17/1845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US813903A
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US964629A
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US1414603A
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DE420049C
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US1670005A
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US1591916A
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DE499880C
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US1787788A
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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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |