US1861083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical rectifier
Assignee: Hitachi Rail STS USA Inc
•
Filing: 1929-01-29
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Granted: 1932-05-31
•
Expires: 1949-01-29
Abstract
No abstract record available.
Inventors
- 👤 Paul H Geiger
- 👤 Strobel Charles Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:10
CPC Classifications
H; H10; H10D; H10D99/00; H10D48/00; H10D48/01; H10D48/04; H10D48/07; H10D62/00; H10D62/80; H10W; H10W72/00
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) | 1935-05-31 | 1935-11-30 | 1936-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-05-31 | 1939-11-30 | 1940-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-05-31 | 1943-11-30 | 1944-05-31 | $7700.00 | Window Closed / Lapsed |