US2924181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw pumps or motors
Assignee: De Laval Steam Turbine Co
•
Filing: 1957-05-13
•
Granted: 1960-02-09
•
Expires: 1977-05-13
Abstract
No abstract record available.
Inventors
- 👤 Morgan B Sennet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:03
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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US1751703A
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US1898914A
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US2386896A
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GB630520A
Cited
US2525619A
Cited
DE813341C
Cited
US2590561A
Cited
GB646344A
Cited
US2590560A
Cited
US2816510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |