US2217526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating circuit controller
Assignee: Hitachi Rail STS USA Inc
•
Filing: 1939-04-13
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Granted: 1940-10-08
•
Expires: 1959-04-13
Abstract
No abstract record available.
Inventors
- 👤 John M Pelikan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:14
CPC Classifications
H; H02; H02B; H02B15/00; B; B61; B61L; B61L19/00; B61L19/06; B61L19/14; H01; H01H; H01H13/00; H01H13/02; H01H13/023
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) | 1943-10-08 | 1944-04-08 | 1944-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-08 | 1948-04-08 | 1948-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-08 | 1952-04-08 | 1952-10-08 | $7700.00 | Window Closed / Lapsed |