Patent US2647685A successfully refreshed from Google Patents.
US2647685A
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Centrifugal impeller structure
Assignee: Packard Motor Car Co
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Filing: 1947-12-13
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Granted: 1953-08-04
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Expires: 1967-12-13
Abstract
No abstract record available.
Inventors
- 👤 Ladislaw G Srogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:05
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2211
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1232795A
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GB305800A
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US2031521A
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GB419252A
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US2034302A
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US2344444A
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US2336231A
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US2421360A
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US2414410A
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US2436911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |