USRE28402E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling semiconductor surface potential
Assignee: —
•
Filing: 1974-02-08
•
Granted: 1975-04-29
•
Expires: 1994-02-08
Abstract
Abstract 1. AN ARTICLE COMPRISING: A LAYER OF ALUMINUM OXIDE HAVING A NEGATIVE CHARGE, A LAYER OF BORON OXIDE HAVING A POSITIVE CHARGE DISPOSED UNDER SAID ALUMINUM OXIDE LAYER AND A SILICON SUBSTRATE HAVING AN INDUCED POSITIVE CHARGE IN A SURFACE THEREOF ADJACENT SAID BORON OXIDE LAYER SAID SUBSTRATE BEING DISPOSED UNDER SAID BORON OXIDE LAYER, SAID NEGATIVE CHARGE AND SAID FIRST-MENTIONED POSITIVE CHARGE COACTING TO PRODUCE SAID INDUCED POSITIVE CHARGE.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:17
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/40; H10W74/43; H10D; H10D99/00; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6326; H10P14/6328; H10P14/6334; H10P14/66; H10P14/662; H10P14/69; H10P14/692; H10P14/6921; H10P14/69215; H10P14/6928; H10P14/6929; H10P14/6938; H10P14/6939; H10P14/69391
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
AN ARTICLE COMPRISING: A LAYER OF ALUMINUM OXIDE HAVING A NEGATIVE CHARGE, A LAYER OF BORON OXIDE HAVING A POSITIVE CHARGE DISPOSED UNDER SAID ALUMINUM OXIDE LAYER AND
Claim 2
Dependent Claim
28 words
AN ARTICLE COMPRISING: A LAYER OF ALUMINUM OXIDE HAVING A NEGATIVE CHARGE, A LAYER OF BORON OXIDE HAVING A POSITIVE CHARGE DISPOSED UNDER SAID ALUMINUM OXIDE LAYER AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |