US2790940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon rectifier and method of manufacture
Assignee: AT&T Inc
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Filing: 1955-04-22
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Granted: 1957-04-30
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Expires: 1975-04-22
Abstract
No abstract record available.
Inventors
- 👤 Morton B Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:53
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/60; H10D; H10D99/00; H10P; H10P32/00; H10W72/00; H10W76/10; H10W76/17; Y; Y10; Y10S; Y10S148/00; Y10S148/062; Y10S438/00; Y10S438/977
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A RECTIFYING ELEMENT COMPRISING A MONOCRYSTALLINE BODY OF SILICON LESS THAN 10 MILS THICK HAVING ALONG ITS THICKNESS DIMENSION AN INTERMEDIATE ZONE OF ONE CONDUCTIVITY TYPE WHICH IS OF LOW CONDUCTIVITY WITH RESPECT TO ADJACENT ZONES, A FIRST TERMINAL ZONE OF SAID ONE CONDUCTIVITY TYPE CONTIGUOUS WITH SAID INTERMEDIATE ZONE AND HAVING A CONDUCTIVITY WHICH IS HIGH WITH RESPECT TO SAID INTERMEDIATE ZONE AND ALSO CONTIGUOUS WITH SAID INTERMEIDATE ZONE A ZONE OF CONDUCTIVITY TYPE OPPOSITE THAT OF SAID FIRST TERMINAL ZONE HAVING A CONDUCTIVITY WHICH IS HIGH WITH RESPECT TO SAID INTERMEDIATE ZONE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |