Patent US3309176A successfully refreshed from Google Patents.
US3309176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature synthesis of compound semiconductors
Assignee: RCA Corp
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Filing: 1961-03-29
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Granted: 1967-03-14
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Expires: 1981-03-29
Abstract
No abstract record available.
Inventors
- 👤 Mayer Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:18
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/007; C01; C01B; C01B25/00; C01B25/06; C01G; C01G15/00; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE METHOD OF SYNTHESIZING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF GALLIUM ARSENIDE, GALLIUM PHOSPHIDE, INDIUM ARSENIDE AND INDIUM PHOSPHIDE COMPRISING PROVIDING AN INTIMATE MIXTURE OF POWDERED ELEMENTS OF ONE OF SAID COMPOUNDS IN APPROXIMATELY STOICHIOMETRIC PROPORTIONS BUT WITH THE MORE VOLATILE ELEMENT OF SAID COMPOUND IN EXCESS, WITHIN A CLOSED SYSTEM, EVACUATING SAID SYSTEM, INTRODUCING INTO SAID SYSTEM A SMALL AMOUNT OF A HALOGEN FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE, HEATING A PORTION OF SAID CLOSED SYSTEM WHICH CONTAINS SAID POWDERED ELEMENTS TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO COMPLETELY REACT SAID POWDERED ELEMENTS TO FORM SAID COMPOUND, UTILIZING SAID HALOGEN AS A CATALYST, WHILE MAINTAINING ANOTHER PORTION OF SAID SYSTEM AT A SOMEWHAT LOWER TEMPERATURE SUCH THAT EXCESS OF SAID MORE VOLATILE ELEMENT IS CONDENSED THEREIN, SAID HEATING TEMPERATURES BEING SUBSTANTIALLY BELOW THE MELTING POINT OF SAID COMPOUND.
Claim 2
Independent Claim
146 words
THE METHOD OF SYNTHESIZING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF GALLIUM ARSENIDE, GALLIUM PHOSPHIDE, INDIUM ARSENIDE AND INDIUM PHOSPHIDE COMPRISING PROVIDING AN INTIMATE MIXTURE OF POWDERED ELEMENTS OF ONE OF SAID COMPOUNDS IN APPROXIMATELY STOICHIOMETRIC PROPORTIONS BUT WITH THE MORE VOLATILE ELEMENT OF SAID COMPOUND IN EXCESS, WITHIN A CLOSED SYSTEM, EVACUATING SAID SYSTEM, INTRODUCING INTO SAID SYSTEM A SMALL AMOUNT OF A HALOGEN FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE, HEATING A PORTION OF SAID CLOSED SYSTEM WHICH CONTAINS SAID POWDERED ELEMENTS TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO COMPLETELY REACT SAID POWDERED ELEMENTS TO FORM SAID COMPOUND, UTILIZING SAID HALOGEN AS A CATALYST, WHILE MAINTAINING ANOTHER PORTION OF SAID SYSTEM AT A SOMEWHAT LOWER TEMPERATURE SUCH THAT EXCESS OF SAID MORE VOLATILE ELEMENT IS CONDENSED THEREIN, SAID HEATING TEMPERATURES BEING SUBSTANTIALLY BELOW THE MELTING POINT OF SAID COMPOUND.
References Cited (Backward Citations)
US1450464A
Cited
US2862787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |