Patent US2728541A successfully refreshed from Google Patents.
US2728541A
Expired / Lapsed
US
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Means to support a motor driven fan from a carrying panel
Assignee: Chelsea Products Inc
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Filing: 1954-10-29
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Granted: 1955-12-27
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Expires: 1974-10-29
Abstract
No abstract record available.
Inventors
- 👤 Leslie R Hansel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:48
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1614190A
Cited
US1873343A
Cited
US1879450A
Cited
US2081030A
Cited
GB494973A
Cited
US2472024A
Cited
US2601947A
Cited
US2656974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |