Patent US2483643A successfully refreshed from Google Patents.
US2483643A
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US
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Multistage centrifugal blower with spiral casings
Assignee: Rheinmetall Air Defence AG
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Filing: 1945-11-20
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Granted: 1949-10-04
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Expires: 1965-11-20
Abstract
No abstract record available.
Inventors
- 👤 Karrer Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:29
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/441; F04D17/00; F04D17/08; F04D17/16; F04D17/164
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-03 | 1953-04-04 | 1953-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-03 | 1957-04-04 | 1957-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-03 | 1961-04-04 | 1961-10-04 | $7700.00 | Window Closed / Lapsed |