US2873222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-solid diffusion of semiconductive material
Assignee: AT&T Inc
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Filing: 1957-11-07
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Granted: 1959-02-10
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Expires: 1977-11-07
Abstract
No abstract record available.
Inventors
- 👤 Derick Lincoln
- 👤 Carl J Frosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:20
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/06; C30B25/00; C30B25/02; C30B25/16; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S252/00; Y10S252/95; Y10S252/951; Y10S438/00; Y10S438/909; Y10S438/914; Y10S438/919; Y10S438/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS COMPRISING THE STEPS OF SUCCESSIVELY CON TACTING A FIRST ATMOSPHERE COMPRISING AT LEAST ONE GAS SELECTED FROM THE GROUP CONSISTING OF H2 AND CO TO A TRIOXIDE SELECTED FROM THE GROUP CONSISTING OF GA2O3 AND IN2O3 WHICH TRIOXIDE IS MAINTAINED AT AN ELEVATED TEMPERATURE, AND THEN TO AN EXTRINSIC CRYSTALLINE SEMICON DUCTIVE BODY MAINTAINED AT AN ELEVATED TEMPERATURE, AND FOLLOWING SAID FIRST ATMOSPHERE WITH A SECOND ATMOSPHERE COMPRISING A NON-REDUCING GAS
Claim 2
Dependent Claim
73 words
A PROCESS COMPRISING THE STEPS OF SUCCESSIVELY CON TACTING A FIRST ATMOSPHERE COMPRISING AT LEAST ONE GAS SELECTED FROM THE GROUP CONSISTING OF H2 AND CO TO A TRIOXIDE SELECTED FROM THE GROUP CONSISTING OF GA2O3 AND IN2O3 WHICH TRIOXIDE IS MAINTAINED AT AN ELEVATED TEMPERATURE, AND THEN TO AN EXTRINSIC CRYSTALLINE SEMICON DUCTIVE BODY MAINTAINED AT AN ELEVATED TEMPERATURE, AND FOLLOWING SAID FIRST ATMOSPHERE WITH A SECOND ATMOSPHERE COMPRISING A NON-REDUCING GAS
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |