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Patent US3480202A successfully refreshed from Google Patents.
US3480202A
Expired / Lapsed
US
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Centrifugal fan having inlet guide baffle
Assignee: AMERICAN DAVIDSON Inc A CORP OF MICH
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Filing: 1967-09-29
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Granted: 1969-11-25
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Expires: 1987-09-29
Abstract
No abstract record available.
Inventors
- 👤 William W Stephenson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:56
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/16; F04D17/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US978397A
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US2305136A
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US2482847A
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US2661894A
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US2722464A
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US2808981A
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US3231176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |