US2989424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing an oxide protective coating for semiconductors
Assignee: Westinghouse Electric Corp
•
Filing: 1958-03-31
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Granted: 1961-06-20
•
Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Angello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:21
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/10; H10W74/131; H10W74/137; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S438/00; Y10S438/958
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A SEMICONDUCTOR BODY HAVING A P-N JUNCTION AND HAVING ON AT LEAST THE SURFACE OF THE P-TYPE ZONE AN ADHERENT PROTECTIVE COATING CONSISTING ONLY OF AT LEAST ONE OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF RED LEAD, ZINC CHROMATE AND STRONTIUM CHROMATE.
Claim 2
Dependent Claim
43 words
A SEMICONDUCTOR BODY HAVING A P-N JUNCTION AND HAVING ON AT LEAST THE SURFACE OF THE P-TYPE ZONE AN ADHERENT PROTECTIVE COATING CONSISTING ONLY OF AT LEAST ONE OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF RED LEAD, ZINC CHROMATE AND STRONTIUM CHROMATE.
References Cited (Backward Citations)
US2816850A
Cited
US2794846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |