Patent US2499347A successfully refreshed from Google Patents.
US2499347A
Expired / Lapsed
US
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Electrical circuits for grinding mills
Assignee: Mine and Smelter Supply Co
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Filing: 1945-04-16
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Granted: 1950-03-07
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Expires: 1965-04-16
Abstract
No abstract record available.
Inventors
- 👤 James A Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:37
CPC Classifications
B; B02; B02C; B02C25/00; H; H02; H02P; H02P5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1599593A
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US1738818A
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US2135957A
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Cited
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Cited
US2381351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |