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US4484945A
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US
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Process for preparation of chalcogenide alloys by solution coreduction of a mixture of oxides
Assignee: Xerox Corp
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Filing: 1984-03-12
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Granted: 1984-11-27
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Expires: 2004-03-12
Abstract
Abstract Disclosed is a process for the preparation of chalcogenide alloys in high purity which comprises providing a solution mixture of oxides of the desired chalcogens, and subsequently subjecting this mixture to a simultaneous coreduction reaction.
Inventors
- 👤 Santokh S. Badesha
- 👤 Thomas W. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:08
CPC Classifications
C; C01; C01B; C01B19/00; C01B19/04; C01B19/007; C01P; C01P2002/00; C01P2002/80
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
33 words
A process for the preparation of chalcogenide alloys in high purity which comprises providing a solution mixture of oxides of the desired chalcogens, and subsequently subjecting this mixture to a simultaneous coreduction reaction.
Claim 2
Dependent Claim
33 words
A process for the preparation of chalcogenide alloys in high purity which comprises providing a solution mixture of oxides of the desired chalcogens, and subsequently subjecting this mixture to a simultaneous coreduction reaction.
Claim 3
Dependent Claim
24 words
A process in accordance with claim 1 wherein a solution mixture of the oxides of selenium and tellurium are subjected to a coreduction reaction.
Claim 4
Dependent Claim
24 words
A process in accordance with claim 1 wherein a solution mixture of the oxides of selenium and arsenic are subjected to a coreduction reaction.
Claim 5
Dependent Claim
25 words
A process in accordance with claim 1 wherein a solution mixture of the oxides of selenium, tellurium and arsenic are subjected to a coreduction reaction.
Claim 6
Dependent Claim
16 words
A process in accordance with claim 1 wherein the reducing agent is hydrazine or sulfur dioxide.
Claim 7
Dependent Claim
15 words
A process in accordance with claim 1 wherein there results a selenium tellurium arsenic alloy.
Claim 8
Dependent Claim
27 words
A process in accordance with claim 1 wherein the reduction reaction is accomplished at a temperature of from about 25 degrees Centigrade to about 120 degrees Centigrade.
Claim 9
Dependent Claim
13 words
A process in accordance with claim 1 wherein the solvent is ethylene glycol.
Claim 10
Dependent Claim
13 words
A process in accordance with claim 1 wherein the solvent is propylene glycol.
Claim 11
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 89 .6 Te 10 .4.
Claim 12
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 89 .6 Te 10 .4.
Claim 13
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 87 .1 Te 12 .9.
Claim 14
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 87 .1 Te 12 .9.
Claim 15
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 83 .6 Te 16 .4.
Claim 16
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 83 .6 Te 16 .4.
Claim 17
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 74 .1 Te 25 .9.
Claim 18
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 74 .1 Te 25 .9.
Claim 19
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 49 .6 Te 49 .4.
Claim 20
Dependent Claim
50 words
A process for the preparation of a chalcogenide alloy in high purity which comprises providing a solution mixture of selenium oxides and tellurium oxides and subsequently subjecting this mixture to a simultaneous coreduction reaction with hydrazine or sulphur dioxide, thereby resulting in the product Se 49 .6 Te 49 .4.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |