US2802620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller for a centrifugal fan or blower
Assignee: Motors Liquidation Co
•
Filing: 1953-02-16
•
Granted: 1957-08-13
•
Expires: 1973-02-16
Abstract
No abstract record available.
Inventors
- 👤 Carl W Darrah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:01
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE368563C
Cited
GB250542A
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US1897947A
Cited
GB414593A
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GB419252A
Cited
US2556676A
Cited
US2633944A
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GB682497A
Cited
DE823477C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |