US4730896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Member for infrared ray transmission
Assignee: Hitachi Cable Ltd
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Filing: 1985-11-20
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Granted: 1988-03-15
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Expires: 2005-11-20
Abstract
Abstract A member capable of transmitting infrared rays of 2 mu m or longer in wavelength, particularly of 10.6 mu m in wavelength, with a slight loss is provided. The member comprises a Ge-Se-Te ternary chalcogenide glass having a composition which, in a compositional diagram of the ternary chalcogenide glass falls within the region bounded by the respective straight lines connecting points A, B, C, D, and E and A in this order, which points A, B, C, D, and E indicate Ge:Se:Te molar proportions of 32:25:43, 20:6:74, 15:5:80, 15:10:75, and 22:31:47, respectively.
Inventors
- 👤 Toshio Katsuyama
- 👤 Hiroyoshi Matsumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:20
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/10; C03C3/00; C03C3/32; C03C3/321; G; G02; G02B; G02B6/00; G02B6/10; G02B6/102; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
A member for transmitting infrared rays, which comprises a Ge-Se-Te ternary chalcogenide glass having a composition which in a compositional diagram of the ternary chalcogenide glass shown in FIG. 1 falls within a region bounded by the respective straight lines connecting points A, B, C, D, E and A in this order, which points A, B, C, D, and E indicate Ge:Se:Te molar proportions of 32:25:43, 20:6:74, 15:5:80, 15:10:75, and 22:31:47, respectively.
Claim 2
Dependent Claim
72 words
A member for transmitting infrared rays, which comprises a Ge-Se-Te ternary chalcogenide glass having a composition which in a compositional diagram of the ternary chalcogenide glass shown in FIG. 1 falls within a region bounded by the respective straight lines connecting points A, B, C, D, E and A in this order, which points A, B, C, D, and E indicate Ge:Se:Te molar proportions of 32:25:43, 20:6:74, 15:5:80, 15:10:75, and 22:31:47, respectively.
Claim 3
Dependent Claim
14 words
The member of claim 1, which is an optical fiber for transmittng infrared rays.
Claim 4
Dependent Claim
15 words
The member of claim 2, which is in the form of rod or flat plate.
Claim 5
Dependent Claim
9 words
The member of claim 1, which further contains aluminum.
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) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |