US4560667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen glasses modified with carbon disulphide and process of preparation
Assignee: PUBLIC DIT CENTRE NATONAL E LA RECHERCHE SCIENTIFIQUE CNRS Ets
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Filing: 1984-07-20
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Granted: 1985-12-24
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Expires: 2004-07-20
Abstract
Abstract Halogen glass is treated, while heated above its fusion temperature, with carbon disulphide. The resulting halogen glass is essentially free of parasitic absorption bands in the infra-red spectrum. The treatment with carbon disulphide apparently lowers the hydroxyl ion content and the metal-oxygen bonds sufficiently to avoid the infra-red absorption bands.
Inventors
- 👤 Jacques Lucas
- 👤 Gilles Fonteneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:05
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/32; C03C3/325; Y; Y10; Y10S; Y10S65/00; Y10S65/90
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
Improved halogen glass essentially free of parasitic absorption bands in the infra-red range comprising CS 2 modified halogen glass containing at least one halide of a metal of an atomic weight greater than 23, the glass having been heated to a temperature above its fusion temperature and subjected to the action of carbon disulfide gas in a controlled atmosphere to reduce the hydroxyl ion content and the metal-oxygen bonds sufficiently to essentially eliminate parasitic absorption bands in the infra-red range.
Claim 2
Dependent Claim
80 words
Improved halogen glass essentially free of parasitic absorption bands in the infra-red range comprising CS 2 modified halogen glass containing at least one halide of a metal of an atomic weight greater than 23, the glass having been heated to a temperature above its fusion temperature and subjected to the action of carbon disulfide gas in a controlled atmosphere to reduce the hydroxyl ion content and the metal-oxygen bonds sufficiently to essentially eliminate parasitic absorption bands in the infra-red range.
Claim 3
Dependent Claim
25 words
Improved halogen glass according to claim 1 wherein, the glass contains at least one halide of a metal of an atomic weight greater than 138.
Claim 4
Dependent Claim
16 words
Improved halogen glass according to claim 1 wherein said at least one halide is a fluoride.
Claim 5
Independent Claim
42 words
A method of preparing an improved halogen glass essentially free of parasitic absorption bands in the infra-red region comprising, subjecting a halogen glass, heated to a temperature above its fusion temperature, to the action of carbon disulphide gas, in a controlled atmosphere.
Claim 6
Independent Claim
42 words
A method of preparing an improved halogen glass essentially free of parasitic absorption bands in the infra-red region comprising, subjecting a halogen glass, heated to a temperature above its fusion temperature, to the action of carbon disulphide gas, in a controlled atmosphere.
Claim 7
Dependent Claim
37 words
A method according to claim 4 comprising, first heating a mixture of components of halogen glass to a temperature above the fusion temperature to form the halogen glass, and treating the fused glass with the carbon disulphide.
Claim 8
Dependent Claim
32 words
A method according to claim 4 wherein, the glass is at a temperature up to 200° C. above its fusion temperature while it is subjected to the action of the carbon disulphide.
Claim 9
Dependent Claim
21 words
A method according to claim 6 wherein, the temperature is 50° to 200° C. above the fusion temperature of the glass.
Claim 10
Dependent Claim
15 words
A method according to claim 4 wherein, the carbon disulphide gas is mixed with helium.
Claim 11
Dependent Claim
15 words
A method according to claim 4 wherein, the carbon disulphide gas is mixed with nitrogen.
Claim 12
Dependent Claim
17 words
A method according to claim 4 wherein, the carbon disulphide gas is mixed with an inert gas.
Claim 13
Dependent Claim
24 words
The method of claim 4 wherein the halogen glass contains at least one halide of a metal of an atomic weight greater than 23.
Claim 14
Dependent Claim
15 words
A method according to claim 11 wherein said at least one halide is a fluoride.
References Cited (Backward Citations)
FR919006A
Cited
US2511224A
Cited
US2466507A
Cited
FR2354977A1
Cited
US4141741A
Cited
FR2384724A1
Cited
US4328318A
Cited
US4341873A
Cited
FR2488873A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |