Patent US2609141A successfully refreshed from Google Patents.
US2609141A
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Centrifugal compressor
Assignee: Sulzer AG
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Filing: 1945-10-02
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Granted: 1952-09-02
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Expires: 1965-10-02
Abstract
No abstract record available.
Inventors
- 👤 Aue George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:15
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/441; F04D17/00; F04D17/08; F04D17/16; F04D17/165; F04D29/52; F04D29/522; F04D29/54; F04D29/541; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US521862A
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DE409450C
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US1042506A
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US1430141A
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US1785354A
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US1771939A
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US1932231A
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US1959703A
Cited
US2463976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |