US2816023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor material and method of preparing same
Assignee: Battelle Development Corp
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Filing: 1955-11-02
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Granted: 1957-12-10
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Expires: 1975-11-02
Abstract
No abstract record available.
Inventors
- 👤 Genser Milton
- 👤 Worth P Allred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:28
CPC Classifications
C; C22; C22C; C22C12/00; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A SEMICONDUCTOR MATERIAL CONSISTING ESSENTIALLY OF ALUMINUM ANTIMONIDE TO WHICH A TRACE AMOUNT OF TANTALUM HAS BEEN ADDED AND INCORPORATED INTO THE CRYSTAL LATTICE, CHARACTERIZED BY A RESISTIVITY OF AT LEAST ABOUT 10,000 OHM-CENTIMETERS.
Claim 2
Dependent Claim
34 words
A SEMICONDUCTOR MATERIAL CONSISTING ESSENTIALLY OF ALUMINUM ANTIMONIDE TO WHICH A TRACE AMOUNT OF TANTALUM HAS BEEN ADDED AND INCORPORATED INTO THE CRYSTAL LATTICE, CHARACTERIZED BY A RESISTIVITY OF AT LEAST ABOUT 10,000 OHM-CENTIMETERS.
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) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |