US2684753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic drive for conveyer belts
Assignee: UNITED ELECTRIC COAL Cos
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Filing: 1952-05-10
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Granted: 1954-07-27
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Expires: 1972-05-10
Abstract
No abstract record available.
Inventors
- 👤 Frank F Kolbe
- 👤 Laddie L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:24
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/02; B65G23/18; Y; Y10; Y10S; Y10S271/00; Y10S271/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |