Patent US2604028A successfully refreshed from Google Patents.
US2604028A
Expired / Lapsed
US
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Air impeller for refrigerator cars
Assignee: Union Asbestos and Rubber Co
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Filing: 1946-03-21
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Granted: 1952-07-22
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Expires: 1966-03-21
Abstract
No abstract record available.
Inventors
- 👤 Arthur F O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:48
CPC Classifications
B; B61; B61D; B61D27/00; B61D27/0018; B61D27/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR450322A
Cited
US1991741A
Cited
US2047156A
Cited
US2349315A
Cited
US2268046A
Cited
US2324749A
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US2323439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |