US2693762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonpositive screw pump and motor
Assignee: De Laval Steam Turbine Co
•
Filing: 1951-10-25
•
Granted: 1954-11-09
•
Expires: 1971-10-25
Abstract
No abstract record available.
Inventors
- 👤 Morgan B Sennet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:22
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/16; F04C2/165; F02; F02B; F02B53/00; F02B2730/00; F02B2730/05; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2111568A
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US2078334A
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US2079083A
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US2321696A
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US2620968A
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US2652192A
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US2581451A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |