Patent US4141741A successfully refreshed from Google Patents.
US4141741A
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Compositions of fluoride glasses and process for manufacturing fluoride glasses
Assignee: Bpifrance Financement SA
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Filing: 1977-06-10
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Granted: 1979-02-27
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Expires: 1997-06-10
Abstract
Abstract Compositions of fluorinated glasses are disclosed which result from the ternary composition of ZrF 4 or HfF 4 , BaF 2 and ThF 4 or UF 4 , each component being within a specified range of composition indices, the indices for the separate components totalling unity.
Inventors
- 👤 Jacques Lucas
- 👤 Michel Poulain
- 👤 Marcel Poulain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/32; C03C3/325; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A fluoride glass which is transparent in the infrared spectrum, said glass being obtained from the ternary combination of three constituents A, B and C, each of which constituents is a fluoride, the vitreous composition being defined by the composition indices x for A, y for B and z for C, in moles per unit mass, with x + y + z = 1, in which A is selected from the group consisting of ZrF 4 and HfF 4 , B is BaF 2 and C is selected from the group consisting of ThF 4 and UF 4 and in which x is within the range of 0.52-0.63, y is within the range 0.27-0.38 and z is within the range 0.02-0.15.
Claim 2
Dependent Claim
121 words
A fluoride glass which is transparent in the infrared spectrum, said glass being obtained from the ternary combination of three constituents A, B and C, each of which constituents is a fluoride, the vitreous composition being defined by the composition indices x for A, y for B and z for C, in moles per unit mass, with x + y + z = 1, in which A is selected from the group consisting of ZrF 4 and HfF 4 , B is BaF 2 and C is selected from the group consisting of ThF 4 and UF 4 and in which x is within the range of 0.52-0.63, y is within the range 0.27-0.38 and z is within the range 0.02-0.15.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |