US3586542A
Expired / Lapsed
US
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Semiconductor junction devices
Assignee: AT&T Inc
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Filing: 1968-11-22
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Granted: 1971-06-22
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Expires: 1988-11-22
Abstract
Abstract THE SPECIFICATION DESCRIBES AN INSULATING GUARD RING STRUCTURE FOR SEMICONDUCTIVE JUNCTION DEVICES PRODUCED BY IMPLANTING SLECTED IONS AROUND THE JUNCTION.
Inventors
- 👤 Alfred U Macrae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:04
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/40; F; F23; F23Q; F23Q9/00; F23Q9/02; H01; H01J; H01J37/00; H01J37/30; H01J37/317; H01J37/3171; H10D; H10D99/00; H10P; H10P95/00; H10W74/00; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S148/00; Y10S148/085; Y10S148/106; Y10S148/139
Claims Analysis
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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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |