US2592476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Series arrangement of positive and nonpositive screw pumps
Assignee: De Laval Steam Turbine Co
•
Filing: 1948-02-07
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Granted: 1952-04-08
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Expires: 1968-02-07
Abstract
No abstract record available.
Inventors
- 👤 Morgan B Sennet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:17
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/16; F04C2/165; F04C15/00; F04C15/0042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1698802A
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GB453415A
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US2358721A
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US2369539A
Cited
US2381695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |