US2580541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary grinding or drying mill
Assignee: Individual
•
Filing: 1947-12-29
•
Granted: 1952-01-01
•
Expires: 1967-12-29
Abstract
No abstract record available.
Inventors
- 👤 Newton L Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:52
CPC Classifications
F; F26; F26B; F26B11/00; F26B11/02; F26B11/04; F26B11/0463; F26B11/0468; B; B02; B02C; B02C17/00; B02C17/04; B02C17/06; B02C17/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US420934A
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US1315770A
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US1062946A
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US1217351A
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US1290178A
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AT85054B
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US1557475A
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US1650508A
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GB469142A
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DE666019C
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GB524029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |