Patent US2754456A successfully refreshed from Google Patents.
US2754456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Madelung
Assignee: —
•
Filing: —
•
Granted: 1956-07-10
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Expires: 1973-07-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:49
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/69; H10P14/692; H10P14/6938; H10P14/6939; H10P14/69391; H10P14/63; H10P14/6302; H10P14/6304; H10P14/6306; H10P14/6312; H10P14/6322
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A SEMICONDUCTOR DEVICE, COMPRISING A SEMICONDUCTIVE BODY CONSISTING ESSENTIALLY OF A BINARY COMPOUND OF ALUMINUM WITH AN ELEMENT OF THE SECOND SUBGROUP IN THE FIFTH GROUP OF THE PERIODIC SYSTEM OF ELEMENTS, CONDUCTOR ELECTRODES JOINED WITH SAID BODY, AND AN ALUMINUM OXIDE COATING ON THE SURFACE AREAS OF SAID BODY OTHER THAN THOSE JOINED WITH SAID ELECTRODES.
Claim 2
Dependent Claim
57 words
A SEMICONDUCTOR DEVICE, COMPRISING A SEMICONDUCTIVE BODY CONSISTING ESSENTIALLY OF A BINARY COMPOUND OF ALUMINUM WITH AN ELEMENT OF THE SECOND SUBGROUP IN THE FIFTH GROUP OF THE PERIODIC SYSTEM OF ELEMENTS, CONDUCTOR ELECTRODES JOINED WITH SAID BODY, AND AN ALUMINUM OXIDE COATING ON THE SURFACE AREAS OF SAID BODY OTHER THAN THOSE JOINED WITH SAID ELECTRODES.
References Cited (Backward Citations)
US1748012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |