US2836776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor
Assignee: NEC Corp
•
Filing: 1956-05-04
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Granted: 1958-05-27
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Expires: 1976-05-04
Abstract
No abstract record available.
Inventors
- 👤 Ishikawa Yoshioki
- 👤 Sasaki Yozo
- 👤 Sato Ichiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:22
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029; H01G9/0032; H10; H10D; H10D99/00; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A CAPACITOR COMPRISING A SHEET OF METAL OXYDIZABLE TO FORM AN ANODIC OXYDATION FILM, AN ANODIC OXYDATION FILM OF SAID METAL ON THE SURFACE OF SAID SHEET, SAID FILM BEING DIVIDED INTO A LAYER OF N-TYPE SEMICONDUCTOR NEXT TO SAID SHEET AND A LAYER OF INTRINSIC SEMICONDUCTOR UPON SAID LAYER OF N-TYPE SEMICONDUCTOR, AND A LAYER OF A SOLID SEMICONDUCTOR SUBSTANCE UPON SAID LAYER OF INTRINSIC SEMICONDUCTOR OF SUCH CHARACTER THAT THE SURFACE OF SAID OXYDATION FILM IS CHANGED TO THE P-TYPE SURFACE STATE.
Claim 2
Dependent Claim
84 words
A CAPACITOR COMPRISING A SHEET OF METAL OXYDIZABLE TO FORM AN ANODIC OXYDATION FILM, AN ANODIC OXYDATION FILM OF SAID METAL ON THE SURFACE OF SAID SHEET, SAID FILM BEING DIVIDED INTO A LAYER OF N-TYPE SEMICONDUCTOR NEXT TO SAID SHEET AND A LAYER OF INTRINSIC SEMICONDUCTOR UPON SAID LAYER OF N-TYPE SEMICONDUCTOR, AND A LAYER OF A SOLID SEMICONDUCTOR SUBSTANCE UPON SAID LAYER OF INTRINSIC SEMICONDUCTOR OF SUCH CHARACTER THAT THE SURFACE OF SAID OXYDATION FILM IS CHANGED TO THE P-TYPE SURFACE STATE.
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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |