US2867550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making selenium rectifiers and article produced thereby
Assignee: International Standard Electric Corp
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Filing: 1954-02-19
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Granted: 1959-01-06
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Expires: 1974-02-19
Abstract
No abstract record available.
Inventors
- 👤 Joachim F L Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:38
CPC Classifications
D; D06; D06B; D06B3/00; D06B3/04; H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/042; H10D48/043; H10D48/0431; H10D48/044; H10D48/046; H10D48/047; H10D99/00; H10W; H10W90/00; D06B2700/00; D06B2700/25; Y; Y10; Y10S; Y10S62/00; Y10S62/20; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12681; Y10T428/12708
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS OF MANUFACTURING SELENIUM RECTIFIERS COMPRISING PRODUCING AN INTERMEDIATE LAYER ON A BASE PLATE BEFORE APPLYING THE SELENIUM, THE LAYER COMPRISING A METAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY, BISMUTH AND TIN, WITH A SLIGHT QUANTITY OF NICKEL BETWEEN 0.1 TO 2 PERCENT BY WEIGHT.
Claim 2
Dependent Claim
47 words
A PROCESS OF MANUFACTURING SELENIUM RECTIFIERS COMPRISING PRODUCING AN INTERMEDIATE LAYER ON A BASE PLATE BEFORE APPLYING THE SELENIUM, THE LAYER COMPRISING A METAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY, BISMUTH AND TIN, WITH A SLIGHT QUANTITY OF NICKEL BETWEEN 0.1 TO 2 PERCENT BY WEIGHT.
References Cited (Backward Citations)
US2412692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |