US2671406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump
Assignee: De Laval Steam Turbine Co
•
Filing: 1950-06-14
•
Granted: 1954-03-09
•
Expires: 1970-06-14
Abstract
No abstract record available.
Inventors
- 👤 Waller Carl Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:49
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/426; F04D29/4273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US605888A
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US1146079A
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US1334461A
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GB186243A
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US1772862A
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US1849217A
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US1931724A
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US1897280A
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US2278772A
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US2427307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |