Patent US3021469A successfully refreshed from Google Patents.
US3241931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices
Assignee: RCA Corp
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Filing: 1963-03-01
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Granted: 1966-03-22
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Triggs William Michael
- 👤 Blumenfeld Martin Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:22
CPC Classifications
H; H10; H10D; H10D99/00; H10D30/00; H10D30/60; H10D64/00; H10D64/01; H10D64/011; H10P; H10P14/00; H10P14/40; H10P95/00; H10P95/50; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10S428/9335; Y10S428/934; Y10S428/935; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/1259; Y10T428/12674; Y10T428/12687; Y10T428/12771; Y10T428/12778; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12861; Y10T428/12896
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A SEIMCONDUCTOR DEVICE COMPRISING A CRYSTALLINE SILICON WAFER, A CHROMIUM FILM ON A PORTION OF A MAJOR FACE OF SAID WAFER, A THIN SILVER-CHROMIUM LAYER OF SAID CHROMIUM FILM, A THIN SILVER LAYER ON SAID SILVER-CHROMIUM LAYER, AND AN ELECTRIC LEAD WIRE ATTACHED TO SAID SILVER LAYER.
Claim 2
Dependent Claim
47 words
A SEIMCONDUCTOR DEVICE COMPRISING A CRYSTALLINE SILICON WAFER, A CHROMIUM FILM ON A PORTION OF A MAJOR FACE OF SAID WAFER, A THIN SILVER-CHROMIUM LAYER OF SAID CHROMIUM FILM, A THIN SILVER LAYER ON SAID SILVER-CHROMIUM LAYER, AND AN ELECTRIC LEAD WIRE ATTACHED TO SAID SILVER LAYER.
References Cited (Backward Citations)
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US2950219A
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US2962806A
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US2820932A
Cited
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US2922092A
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |