US4461841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid-soluble glass composition for making flexible fiber optic bundle
Assignee: Fujinon Corp
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Filing: 1981-09-14
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Granted: 1984-07-24
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Expires: 2001-09-14
Abstract
Abstract An acid-soluble glass used in manufacture of a flexible fiber optic bundle and a process for manufacturing a flexible fiber optic bundle using the glass. The glass has a composition expressed by mol percent comprising more than 15.0% and less than 41.0% of SiO2, more than 29.0% and less than 54.0% of B2O3, more than 6.0% and less than 23.0% of BaO, and more than 5.0% and less than 19.0% of at least one alkali metal oxide selected from the group consisting of Na2O, K2O and Li2O, the total amount of SiO2, B2O3 and BaO being more than 71.0% and less than 80.0%.
Inventors
- 👤 Yuho Harada
- 👤 Shigeo Kuwayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:02
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/04; C03C13/045; C03C13/046; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/066; C03C3/076; C03C3/089; C03C3/091; C03C3/093; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
150 words
An acid-soluble glass for use in manufacture of a flexible fiber optic bundle having a composition expressed by mol percent consisting essentially of more than 15.0% and less than 41.0% of SiO 2 , more than 29.0% and less than 54.0% of B 2 O 3 , more than 6.0% and less than 23.0% of BaO, and more than 5.0% and less than 19.0% of at least one alkali metal oxide selected from the group consisting of Na 2 O, K 2 O and Li 2 O, the total amount of said SiO 2 , B 2 O 3 and BaO being more than 71.0% and less than 80.0%, and further comprising at least one component selected from the group consisting of not more than 12.0% ZnO, not more than 7.0% Al 2 O 3 , and not more than 5.0% of at least one of MgO, CaO and SrO.
Claim 2
Dependent Claim
150 words
An acid-soluble glass for use in manufacture of a flexible fiber optic bundle having a composition expressed by mol percent consisting essentially of more than 15.0% and less than 41.0% of SiO 2 , more than 29.0% and less than 54.0% of B 2 O 3 , more than 6.0% and less than 23.0% of BaO, and more than 5.0% and less than 19.0% of at least one alkali metal oxide selected from the group consisting of Na 2 O, K 2 O and Li 2 O, the total amount of said SiO 2 , B 2 O 3 and BaO being more than 71.0% and less than 80.0%, and further comprising at least one component selected from the group consisting of not more than 12.0% ZnO, not more than 7.0% Al 2 O 3 , and not more than 5.0% of at least one of MgO, CaO and SrO.
Claim 3
Dependent Claim
13 words
The acid-soluble glass of claim 1, further comprising a small amount of colorant.
Claim 4
Dependent Claim
14 words
The acid-soluble glass of claim 1, further comprising a small amount of fining agent.
Claim 5
Dependent Claim
21 words
The acid-soluble glass of claim 3, wherein said fining agent is As 2 O 3 or Sb 2 O 3 .
References Cited (Backward Citations)
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US3413133A
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US3624816A
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JPS509186A
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US4275951A
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US4277270A
Cited
US4236930A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |