US2736672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selenium rectifier of increased blocking properties
Assignee: International Standard Electric Corp
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Filing: 1952-05-22
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Granted: 1956-02-28
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Expires: 1972-05-22
Abstract
No abstract record available.
Inventors
- 👤 Klein Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:30
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
44 words
A SELENIUM RECTIFIER COMPRISING A BASE ELECTRODE, A HALOGEN-CONTAINING SELENIUM LAYER ON SAID BASE ELECTRODE, AND A SECOND SELENIUM LAYER SUBSTANTIALLY FREE OF HALOGEN CONTAINING AS AN ADDITIVE AN ALKALINE METAL AND A CRYSTALLIZATION-RETARDING SUBSTANCE TAKEN FROM THE CLASS CONSISTING OF ARSENIC AND PHOSPHOROUS.
Claim 2
Dependent Claim
44 words
A SELENIUM RECTIFIER COMPRISING A BASE ELECTRODE, A HALOGEN-CONTAINING SELENIUM LAYER ON SAID BASE ELECTRODE, AND A SECOND SELENIUM LAYER SUBSTANTIALLY FREE OF HALOGEN CONTAINING AS AN ADDITIVE AN ALKALINE METAL AND A CRYSTALLIZATION-RETARDING SUBSTANCE TAKEN FROM THE CLASS CONSISTING OF ARSENIC AND PHOSPHOROUS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |