Invention Grant
- Patent Title: Preparation of red amorphous selenium
- Patent Title (中): 红色无定形硒的制备
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Application No.: US649959Application Date: 1976-01-16
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Publication No.: US4007255APublication Date: 1977-02-08
- Inventor: David A. Buckley
- Applicant: David A. Buckley
- Applicant Address: CT Stamford
- Assignee: Xerox Corporation
- Current Assignee: Xerox Corporation
- Current Assignee Address: CT Stamford
- Main IPC: C01B19/02
- IPC: C01B19/02 ; C01B19/00
Abstract:
Red amorphous selenium is obtained by precipitating selenium from a solution of selenious acid in methanol or ethanol with hydrazine or a soluble salt thereof at a temperature between about -20.degree. C. and the freezing point of the solution. Further, the stable red amorphous may contain thallium which may then contain a halogen.
Public/Granted literature
- US5940762A Inter-system calling supporting inter-system soft handoff Public/Granted day:1999-08-17
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