US2338890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical rectifier
Assignee: Hitachi Rail STS USA Inc
•
Filing: 1941-07-12
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Granted: 1944-01-11
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Expires: 1961-07-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Conrad H Zierdt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:30
CPC Classifications
H; H10; H10W; H10W90/00; Y; Y10; Y10S; Y10S411/00; Y10S411/90; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12715
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) | 1947-01-10 | 1947-07-12 | 1948-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-01-10 | 1951-07-12 | 1952-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-01-10 | 1955-07-12 | 1956-01-11 | $7700.00 | Window Closed / Lapsed |