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US2678240A
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Automatic control system for granular material handling drums
Assignee: T W SNOW CONSTRUCTION Co
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Filing: 1950-11-14
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Granted: 1954-05-11
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Expires: 1970-11-14
Abstract
No abstract record available.
Inventors
- 👤 Barton S Snow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:03
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/52; B65G53/525
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB180397A
Cited
US1858561A
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US1935843A
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US1901932A
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US2032367A
Cited
GB449432A
Cited
US2221741A
Cited
US2413479A
Cited
US2380651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |