US2974075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of semiconductive devices
Assignee: AT&T Inc
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Filing: 1957-10-28
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Granted: 1961-03-07
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Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:04
CPC Classifications
H; H10; H10P; H10P95/00; H10W; H10W74/00; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S438/00; Y10S438/91; Y10S438/974
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS OF TREATING THE SURFACE OF A SEMICONDUCTIVE BODY CONSISTING OF A MEATERIAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM, SILICON AND GERMANIUM-SILICON ALLOYS WHICH CONSISTS ESSENTIALLY OF WETTING SAID BODY WITH A SOLUTION CONSISTING ESSENTIALLY OF HYDROGEN PEROXIDE AND WATER AND HEATING SAID WETTED BODY HAVING SAID HYDROGEN PEROXIDE RETAINED THEREON IN AN ATMOSPHERE CONTAINING OXYGEN WHICH IS INDEPENDENT OF ANY OXYGEN WHICH MAY BE DERIVED FROM SAID HYDROGEN PEROXIDE TO A TEMPERATURE OF AT LEAST APPROXIMATELY 100*C. AND BELOW THE MELTING POINT OF THE LOWEST MELTING COMPONENT OF THE BODY AND MAINTAINING SAID BODY IN CONTACT WITH SAID ATMOSPHERE AT SAID TEMPERATURE.
Claim 2
Dependent Claim
105 words
A PROCESS OF TREATING THE SURFACE OF A SEMICONDUCTIVE BODY CONSISTING OF A MEATERIAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM, SILICON AND GERMANIUM-SILICON ALLOYS WHICH CONSISTS ESSENTIALLY OF WETTING SAID BODY WITH A SOLUTION CONSISTING ESSENTIALLY OF HYDROGEN PEROXIDE AND WATER AND HEATING SAID WETTED BODY HAVING SAID HYDROGEN PEROXIDE RETAINED THEREON IN AN ATMOSPHERE CONTAINING OXYGEN WHICH IS INDEPENDENT OF ANY OXYGEN WHICH MAY BE DERIVED FROM SAID HYDROGEN PEROXIDE TO A TEMPERATURE OF AT LEAST APPROXIMATELY 100*C. AND BELOW THE MELTING POINT OF THE LOWEST MELTING COMPONENT OF THE BODY AND MAINTAINING SAID BODY IN CONTACT WITH SAID ATMOSPHERE AT SAID TEMPERATURE.
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |