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Patent US3517650A successfully refreshed from Google Patents.
US3517650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan arrangement for automotive vehicles and the like
Assignee: GERD W SEIFERT
•
Filing: 1968-02-15
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Granted: 1970-06-30
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Expires: 1988-02-15
Abstract
No abstract record available.
Inventors
- 👤 Gerd W Seifert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:04
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/02; F01P7/08; F01P7/081; F01P7/082; F01P7/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2740388A
Cited
US3120219A
Cited
GB957506A
Cited
US3144922A
Cited
US3221721A
Cited
US3158321A
Cited
US3266471A
Cited
US3323596A
Cited
US3382852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |