US3901996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a chalcogenide glass having silicon containing layer and product
Assignee: National Institute for Materials Science
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Filing: 1973-10-02
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Granted: 1975-08-26
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Expires: 1993-10-02
Abstract
Abstract A chalcogenide glass is prepared by melting a mixture of arsenic and a chalcogen of sulfur or selenium, contacting the molten chalcogenide glass with a silica glass surface in the absence of oxygen and solidifying the molten chalcogenide glass by cooling so as to form a glass with a silicon-containing layer. The molten chalcogenide glass is drawn through a silica glass nozzle heated under an inert atmosphere at a temperature the same or greater than the temperature of the molten chalcogenide glass with a force to maintain a suitable tensile strength on the extruded glass.
Inventors
- 👤 Yasushi Hasegawa
- 👤 Hideo Tagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:48
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/04; C03C13/041; C03C13/043; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C03C25/1061; C03C3/00; C03C3/32; C03C3/321; Y; Y10; Y10S; Y10S65/00; Y10S65/15
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A PROCESS FOR PREPARING A CHALCOGENIDE GLASS HAVING A SILICON-CONTAINING LAYER, WHICH COMPRISES MELTING A MIXTURE OF ARSENTIC AND A CHALCOGEN OF SULFUR OR SELENIUM, CONTACTING THE MOLTEN CHALCOGENIDE GLASS WITH A SILICA GLASS SURFACE IN AN ATMOSPHERE REACTS WITH SAID MOLTEN CHALOGENIDE GLASS TO DEPOSIT A SURFACE REACTS WITH SAID MOLTEN CHALOGENIDE GLASS SURFACE IN AN FILM OF SILICA METAL THEREON, AND SILIDIFYING SAID MOLTEN CHALCOGENIDE GLASS BY COOLING.
Claim 2
Dependent Claim
70 words
A PROCESS FOR PREPARING A CHALCOGENIDE GLASS HAVING A SILICON-CONTAINING LAYER, WHICH COMPRISES MELTING A MIXTURE OF ARSENTIC AND A CHALCOGEN OF SULFUR OR SELENIUM, CONTACTING THE MOLTEN CHALCOGENIDE GLASS WITH A SILICA GLASS SURFACE IN AN ATMOSPHERE REACTS WITH SAID MOLTEN CHALOGENIDE GLASS TO DEPOSIT A SURFACE REACTS WITH SAID MOLTEN CHALOGENIDE GLASS SURFACE IN AN FILM OF SILICA METAL THEREON, AND SILIDIFYING SAID MOLTEN CHALCOGENIDE GLASS BY COOLING.
Claim 3
Dependent Claim
36 words
The process of claim 1, wherein said molten chalcogenide glass is extruded from a nozzle made of silica glass which acts as a source of silica to form a chalcogenide glass fiber having a silicon-containing layer.
Claim 4
Dependent Claim
28 words
The process of claim 1, wherein the molten chalcogenide glass is contacted with the silica glass which is at a temperature greater than that of the chalcogenide glass.
Claim 5
Dependent Claim
37 words
The process of claim 1, wherein said mixture contains 15 - 50 atom % arsenic or a mixture of arsenic and antimony, and 85 - 50 atom % sulfur, selenium or a mixture of sulfur and selenium.
Claim 6
Dependent Claim
23 words
The process of claim 4, wherein 0 - 10 wt. % tellurium or 0 -5 wt. % germanium is added to the mixture.
Claim 7
Dependent Claim
6 words
The chalcogenide glass of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |