US1905724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric current valve
Assignee: Hitachi Rail STS USA Inc
•
Filing: 1927-08-08
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Granted: 1933-04-25
•
Expires: 1947-08-08
Abstract
No abstract record available.
Inventors
- 👤 John G H Liebel
- 👤 Robert C Jacquelet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:43
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/07; H10D48/071; H10D48/075; H10P; H10P14/00; H10P14/20; H10P14/203; H10P14/34; H10P14/3402; H10P14/3434
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-04-24 | 1936-10-24 | 1937-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-24 | 1940-10-24 | 1941-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-24 | 1944-10-24 | 1945-04-25 | $7700.00 | Window Closed / Lapsed |