US2724078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selenium rectifiers
Assignee: TDK Micronas GmbH
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Filing: 1951-12-29
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Granted: 1955-11-15
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Expires: 1971-12-29
Abstract
No abstract record available.
Inventors
- 👤 Robert F Durst
- 👤 Gerald C Florio
- 👤 Donald W Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:23
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/40; H10W76/42; H10W76/48; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/043; H10D48/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN A RECTIFIER HAVING A BASE PLATE, A LAYER OF SELENIUM ON THE BASE PLATE, A COUNTER-ELECTRODE LAYER ON THE SELENIUM, AND AN INTERMEDIATE LAYER BETWEEN THE SELENIUM AND THE COUNTER-ELECTRODE COMPRISING A SOLUTION OF A HIGH MOLECULAR WEIGHT LINEAR POLYMERIC CARBONAMIDE SOLUBLE IN THE LOWER ALIPHATIC ALCOHOLS TOGETHER WITH A NITROPARAFFIN, SAID NITRO-PARAFFIN CONTAINING 1/4% TO 1% SEO2.
Claim 2
Dependent Claim
59 words
IN A RECTIFIER HAVING A BASE PLATE, A LAYER OF SELENIUM ON THE BASE PLATE, A COUNTER-ELECTRODE LAYER ON THE SELENIUM, AND AN INTERMEDIATE LAYER BETWEEN THE SELENIUM AND THE COUNTER-ELECTRODE COMPRISING A SOLUTION OF A HIGH MOLECULAR WEIGHT LINEAR POLYMERIC CARBONAMIDE SOLUBLE IN THE LOWER ALIPHATIC ALCOHOLS TOGETHER WITH A NITROPARAFFIN, SAID NITRO-PARAFFIN CONTAINING 1/4% TO 1% SEO2.
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) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |