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US2793737A
Expired / Lapsed
US
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Scraper conveyors
Assignee: Mavor and Coulson Ltd
•
Filing: 1954-12-22
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Granted: 1957-05-28
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Expires: 1974-12-22
Abstract
No abstract record available.
Inventors
- 👤 Cargill S Sandeman
- 👤 Robert H Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:06
CPC Classifications
B; B65; B65G; B65G19/00; B65G19/18; B65G19/28; B65G19/04; B65G19/06; B65G19/10; B65G19/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE893629C
Cited
US2381519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |