Patent US2569191A successfully refreshed from Google Patents.
US2569191A
Expired / Lapsed
US
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Wagon unloading attachment for pneumatic elevators
Assignee: International Motors LLC
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Filing: 1947-10-22
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Granted: 1951-09-25
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Expires: 1967-10-22
Abstract
No abstract record available.
Inventors
- 👤 Walter R Peterson
- 👤 Erwin R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:21
CPC Classifications
B; B65; B65G; B65G23/00; B65G2811/00; B65G2811/09; B65G2811/095; B65G2811/096; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1508; Y10T74/1518; Y10T74/1523
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1785594A
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US2097729A
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US2145942A
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US2321168A
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US2340983A
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US2355226A
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US2410996A
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US2448122A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |