Patent US2590952A successfully refreshed from Google Patents.
US2590952A
Expired / Lapsed
US
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Portable electric fan
Assignee: WILLIAM W WELCH
•
Filing: 1949-01-13
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Granted: 1952-04-01
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Expires: 1969-01-13
Abstract
No abstract record available.
Inventors
- 👤 Alfred F Fukal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:04
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/12; F04D25/14; Y; Y10; Y10S; Y10S280/00; Y10S280/08; Y10S55/00; Y10S55/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1713648A
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US1873343A
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US1713946A
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US1828016A
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US1917327A
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US1971827A
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US2037250A
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US2141923A
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US2323178A
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US2355836A
Cited
US2525853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |