US2899344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:20
CPC Classifications
H; H10; H10P; H10P70/00; H10P70/10; H10P70/15; H10D; H10D99/00; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/6309; H10P14/6322; H10P14/65; H10P14/6502; H10P14/6508; H10P95/00; H10W; H10W74/00; H10W74/40; H10W74/43; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; Y; Y10; Y10S; Y10S438/00; Y10S438/906; Y10S438/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
THE METHOD OF PROVIDING AN ELECTRICALLY STABLE SEMICONDUCTOR SURFACE COMPRISING WISHING A BODY OF SEMICONDUCTIVE MATERIAL IN AN ACID SOLUTION, RINSING SAID BODY IN DEIONZIED WATER, IMMERSING SAID BODY IN ANHYDROCARBONS SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE AND XYLENE AT ABOUT 100 DEGREES CENTIGRADE FOR A SHORT BODY IN BOILING DEIONIZED WATER, IMMERSING SAID BODY IN NITRIC ACID AT ABOUT 100 DEGREES CENTIGRADE FOR A SHORT TIME, RINSING SAID BODY IN CIRCULATING DEIONIZED WATER AT ABOUT 90 DEGREES CENTIGRADE, THEN RINSING SAID BODY IN CIRCULATING DEIONIZED WATER AT ROOM TEMPERATURE, AND IMMEDIATELY PLACING SAID BODY IN A STREAM OF SUBSTANTIALLY PURE OXYGEN AT A TEMPERATURE OF ABOUT 900 DEGREES CENTRIGRADE FOR A SUFFICIENT TIME TO PROVIDE AN OXIDE FILM ON THE SURFACES OF SAID BODY THE ORDER OF AT LEAST 200 ANGSTROMS THICKNESS.
Claim 2
Independent Claim
135 words
THE METHOD OF PROVIDING AN ELECTRICALLY STABLE SEMICONDUCTOR SURFACE COMPRISING WISHING A BODY OF SEMICONDUCTIVE MATERIAL IN AN ACID SOLUTION, RINSING SAID BODY IN DEIONZIED WATER, IMMERSING SAID BODY IN ANHYDROCARBONS SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE AND XYLENE AT ABOUT 100 DEGREES CENTIGRADE FOR A SHORT BODY IN BOILING DEIONIZED WATER, IMMERSING SAID BODY IN NITRIC ACID AT ABOUT 100 DEGREES CENTIGRADE FOR A SHORT TIME, RINSING SAID BODY IN CIRCULATING DEIONIZED WATER AT ABOUT 90 DEGREES CENTIGRADE, THEN RINSING SAID BODY IN CIRCULATING DEIONIZED WATER AT ROOM TEMPERATURE, AND IMMEDIATELY PLACING SAID BODY IN A STREAM OF SUBSTANTIALLY PURE OXYGEN AT A TEMPERATURE OF ABOUT 900 DEGREES CENTRIGRADE FOR A SUFFICIENT TIME TO PROVIDE AN OXIDE FILM ON THE SURFACES OF SAID BODY THE ORDER OF AT LEAST 200 ANGSTROMS THICKNESS.
References Cited (Backward Citations)
CA503304A
Cited
US2462218A
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US2583681A
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US2768100A
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US2736639A
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US2738259A
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US2705192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |