Patent US3378192A successfully refreshed from Google Patents.
US3378192A
Expired / Lapsed
US
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Means for securing the impeller to the motor of an electrically driven fan
Assignee: IMC Magnetics Corp
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Filing: 1966-12-20
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Granted: 1968-04-16
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Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 Karl E Friese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:11
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/056; F04D25/00; F04D25/02; F04D25/06; F04D25/0606; F04D29/26; F04D29/263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2742223A
Cited
US2926838A
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US3158412A
Cited
US3229897A
Cited
US3276678A
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US3276675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |