US2571179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump and turbine reversible fluid transmission
Assignee: Individual
•
Filing: 1947-02-13
•
Granted: 1951-10-16
•
Expires: 1967-02-13
Abstract
No abstract record available.
Inventors
- 👤 David B Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:41
CPC Classifications
F; F16; F16H; F16H43/00; F16H48/00; F16H48/12; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US203340A
Cited
US1078710A
Cited
US1141812A
Cited
US1384511A
Cited
FR612938A
Cited
US2069360A
Cited
US2379164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |