Patent US4321409A successfully refreshed from Google Patents.
US2823149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming barrier layers in crystalline bodies
Assignee: Sprague Electric Co
•
Filing: 1953-10-27
•
Granted: 1958-02-11
•
Expires: 1973-10-27
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:21
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6324; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/6309; H10P14/6314; H10P14/6326; H10P14/6328; H10P14/69; H10P14/692; H10P14/6938; H10P14/6939; H10P14/69393; H10P14/69394; H10P32/00; H10P32/10; H10P32/14; H10P32/1404; H10P32/1408; H10P32/17; H10P32/171; H10P76/00; H10P76/40; H10P95/00; H10W; H10W74/00; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S438/00; Y10S438/914; Y10S438/92; Y10S438/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS OF PRODUCING A BARRIER LAYER WITHIN A CRYSTALLINE BODY OF A SEMICONDUCTIVE MATERIAL WHICH COMPRISES OXIDIZING A SURFACE LAYER OF SAID SEMICONDUCTIVE MATERIAL TO AN OXIDE, DEPOSITING AN LEMENT CAPABLE OF CHANGING THE CONDUCTIVITY OF SAID SEMICONDUCTIVE MATERIAL UPON SAID OXIDE LAYER, AND THERMALLY CAUSING SAID ELEMENT TO DIFFUSE THROUGH SAID OXIDE LAYER INTO SAID BODY OF SEMOCONDUCTIVE MATERIAL.
Claim 2
Dependent Claim
61 words
A PROCESS OF PRODUCING A BARRIER LAYER WITHIN A CRYSTALLINE BODY OF A SEMICONDUCTIVE MATERIAL WHICH COMPRISES OXIDIZING A SURFACE LAYER OF SAID SEMICONDUCTIVE MATERIAL TO AN OXIDE, DEPOSITING AN LEMENT CAPABLE OF CHANGING THE CONDUCTIVITY OF SAID SEMICONDUCTIVE MATERIAL UPON SAID OXIDE LAYER, AND THERMALLY CAUSING SAID ELEMENT TO DIFFUSE THROUGH SAID OXIDE LAYER INTO SAID BODY OF SEMOCONDUCTIVE MATERIAL.
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |