US4380588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass for infrared ray-transmitting optical fibers and optical fibers formed from said glass
Assignee: NTT Inc
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Filing: 1982-01-18
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Granted: 1983-04-19
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Expires: 2002-01-18
Abstract
Abstract An infrared ray-transmitting glass composition for optical fibers consisting essentially of 28 mol % to 38 mol % of BaF2, 2 mol % to 7 mol % of GdF3 and 58 mol % to 69 mol % of ZrF4, and optical fibers comprising said glass composition.
Inventors
- 👤 Seiko Mitachi
- 👤 Shuichi Shibata
- 👤 Terutoshi Kanamori
- 👤 Toyotaka Manabe
- 👤 Mitsuho Yasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:00
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/01265; C03B37/01268; C03B37/02; C03B37/025; C03B37/027; C03B37/02736; C03B37/029; C03C; C03C13/00; C03C13/04; C03C13/041; C03C13/042; C03C3/00; C03C3/32; C03C3/325; C03C4/00; C03C4/10; C03B2201/00; C03B2201/80; C03B2201/82; C03B2205/00; C03B2205/60; C03B2205/62; C03B2205/63; C03B2205/74; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
38 words
An infrared ray-transmitting glass composition for optical fibers consisting essentially of 28 mol% to 38 mol% of BaF 2 , 2 mol% to 7 mol% of GdF 3 and 58 mol% to 69 mol% of ZrF 4 .
Claim 2
Dependent Claim
38 words
An infrared ray-transmitting glass composition for optical fibers consisting essentially of 28 mol% to 38 mol% of BaF 2 , 2 mol% to 7 mol% of GdF 3 and 58 mol% to 69 mol% of ZrF 4 .
Claim 3
Dependent Claim
25 words
The glass material of claim 1 consisting essentially of 30 mol% BaF 2 , 2 mol% GdF 3 , and 68 mol% ZrF 4 .
Claim 4
Dependent Claim
25 words
The glass material of claim 1 consisting essentially of 30 mol% BaF 2 , 3 mol% GdF 3 , and 67 mol% ZrF 4 .
Claim 5
Dependent Claim
24 words
The glass material of claim 1 consisting essentially of 30 mol% BaF 2 , 5 mol% GdF 3 , and 65 mol% ZrFHd 4.
Claim 6
Dependent Claim
18 words
A glass optical fiber having superior infrared ray-transmitting characteristics consisting essentially of the glass composition of claim 1.
Claim 7
Dependent Claim
18 words
A glass optical fiber having superior infrared ray-transmitting characteristics consisting essentially of the glass composition of claim 2.
Claim 8
Dependent Claim
18 words
A glass optical fiber having superior infrared ray-transmitting characteristics consisting essentially of the glass composition of claim 3.
Claim 9
Dependent Claim
18 words
A glass optical fiber having superior infrared ray-transmitting characteristics consisting essentially of the galss composition of claim 4.
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) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |