US2579557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counter electrode of selenium rectifiers
Assignee: Westinghouse Electric Corp
•
Filing: 1947-12-11
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Granted: 1951-12-25
•
Expires: 1967-12-11
Abstract
No abstract record available.
Inventors
- 👤 Theodore E Ebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:36
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/047; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
IN A DRY-TYPE RECTIFIER, THE COMBINATION COMPRISING, A FORWARD ELECTRODE OF SELENIUM AND A COUNTER ELECTRODE OF AN ALLOY COMPOSED OF 45% TO 70% TIN AND 55% TO 30% ZINC.
Claim 2
Dependent Claim
30 words
IN A DRY-TYPE RECTIFIER, THE COMBINATION COMPRISING, A FORWARD ELECTRODE OF SELENIUM AND A COUNTER ELECTRODE OF AN ALLOY COMPOSED OF 45% TO 70% TIN AND 55% TO 30% ZINC.
References Cited (Backward Citations)
US756678A
Cited
US2124306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |