US3426965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal fan having removable blade section
Assignee: AMERICAN DAVIDSON Inc A CORP OF MICH
•
Filing: 1967-01-10
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Granted: 1969-02-11
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Expires: 1987-01-10
Abstract
No abstract record available.
Inventors
- 👤 Gerald J Kulling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1071660A
Cited
US1635840A
Cited
US1600690A
Cited
US1983201A
Cited
US1953064A
Cited
US1985705A
Cited
US2006340A
Cited
US2225779A
Cited
FR1139152A
Cited
US3093219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |