US3635753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Growth of needlelike vls crystals
Assignee: AT&T Inc
•
Filing: 1969-09-24
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Granted: 1972-01-18
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Expires: 1989-09-24
Abstract
Abstract Single crystal material of needlelike form may be obtained by means of the vapor-liquid-solid crystal growth technique, growth parameters of the growing crystalline material being controlled so as to result in the removal of the impurity agent and the concomitant decrease in the volume of the liquid solution and growth of crystalline materials evidencing sharp terminations.
Inventors
- 👤 John R Arthur Jr
- 👤 Richard S Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:51
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/04; C30B11/08; C30B11/12; Y; Y10; Y10S; Y10S148/00; Y10S148/107
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
41 words
A method in accordance with the procedure of claim 1 wherein said agent is gallium and said crystalline material is gallium arsenide, the said vapor comprising gallium trichloride and arsine, the arsine being present in an amount in excess of stoichiometry.
References Cited (Backward Citations)
US3493431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |