Patent DE1191980B successfully refreshed from Google Patents.
US2681760A
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US
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Centrifugal compressor
Assignee: Curtiss Wright Corp
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Filing: 1949-02-26
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Granted: 1954-06-22
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Expires: 1969-02-26
Abstract
No abstract record available.
Inventors
- 👤 Wilton G Lundquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:06
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/288; F04D21/00; F04D29/40; F04D29/42; F04D29/44; F04D29/441; F04D29/442; F04D29/444; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1075300A
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US1119713A
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US1447915A
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US1617133A
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GB351278A
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GB456976A
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US2490066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |