US2671635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible pump-turbine
Assignee: Baldwin Lima Hamilton Corp
•
Filing: 1950-05-25
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Granted: 1954-03-09
•
Expires: 1970-05-25
Abstract
No abstract record available.
Inventors
- 👤 Richard B Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:16
CPC Classifications
F; F03; F03B; F03B3/00; F03B3/10; F03B3/103; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10S; Y10S415/00; Y10S415/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1611341A
Cited
US1837568A
Cited
US1627294A
Cited
GB250234A
Cited
US1664895A
Cited
US2028368A
Cited
FR821862A
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 |