US2070321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact for rectifiers
Assignee: Westinghouse Electric Corp
•
Filing: 1934-03-30
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Granted: 1937-02-09
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Expires: 1954-03-30
Abstract
No abstract record available.
Inventors
- 👤 Lumir F Slezak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:17
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/07; H10D48/071; H10D48/076; Y; Y10; Y10T; Y10T428/00; Y10T428/21; Y10T428/218; Y10T428/31504; Y10T428/31678
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) | 1940-02-09 | 1940-08-10 | 1941-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-09 | 1944-08-10 | 1945-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-09 | 1948-08-10 | 1949-02-09 | $7700.00 | Window Closed / Lapsed |