Patent DE427307C successfully refreshed from Google Patents.
Patent US2463900A successfully refreshed from Google Patents.
US2463900A
Expired / Lapsed
US
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Air motor of the expansible chamber collapsible wall type
Assignee: Detroit Harvester Co
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Filing: 1945-02-26
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Granted: 1949-03-08
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Expires: 1965-02-26
Abstract
No abstract record available.
Inventors
- 👤 Stanley W Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:26
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; E05F15/57; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/55
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE454660C
Cited
GB191116407A
Cited
US1267535A
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US1727935A
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US1680089A
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US2086251A
Cited
US2218719A
Cited
US2236450A
Cited
US2336530A
Cited
US2372813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |