US3607322A
Expired / Lapsed
US
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Light transmitting glass fibers, core and cladding glass compositions
Assignee: Owens Corning
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Filing: 1969-05-22
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Granted: 1971-09-21
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Expires: 1989-05-22
Abstract
Abstract Glass compositions are disclosed for use in producing light transmitting glass fibers composed of a central core glass surrounded by an outer cladding glass. The core glasses have the following range of proportions (by weight): SiO2, 23-41%; A12O3, 7-10%; B2O3, 2.5-11%; K2O, up to 10%; BaO, 34-59%; Sb2O3, up to 0.05%, preferably 0.01 to 0.05%. The cladding glasses have the following range of proportions (by weight): SiO2, 61-65%; A12O3, 4-6%; CaO, up to 3%; MgO, 0.90-4%; B2O3, 12-16%; Na2O, 7-12%; Li2O, up to 4%; F2, up to 3%; SeO2 up to 0.004%, preferably 0.002 to 0.004%.
Inventors
- 👤 William C Brady
- 👤 Ralph L Tiede
- 👤 Folsom M Veazie
- 👤 Warren W Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:49
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C3/115; C03C3/118; C03C13/00; C03C13/04; C03C13/045; C03C13/046; C03C3/062; C03C3/064; C03C3/089; C03C3/091; Y; Y10; Y10S; Y10S501/00; Y10S501/90
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
22 words
The glass composition of claim 1 wherein he total amount of K2O and B2O3 is from 9.5 to 15.5 percent by weight.
Claim 2
Dependent Claim
14 words
The glass composition of claim 1 wherein 0.01-0.05 percent of Sb2O3 is included therein.
Claim 3
Dependent Claim
30 words
The glass composition of claim 1 wherein the total amount of the oxides of Cr, Cu, Fe and Mn is less than 0.05 percent by weight of said glass composition.
Claim 4
Dependent Claim
54 words
A glass composition having an index of refraction of about 1.60 and capable of transmitting light when in fiber form and surrounded by another glass having an index of refraction not greater than 1.52, said glass composition consisting essentially by weight of: Percent SiO230-32 A12O3 7-8 B2O3 6-7 K2O 5-7 BaO 46-49 Sb2O3 0.01-0.05
Claim 5
Dependent Claim
30 words
The glass composition of claim 5 wherein the total amount of the oxides of Cr, Cu, Fe and Mn is less than 0.05 percent by weight of said glass composition.
Claim 6
Dependent Claim
53 words
A glass composition having an index of refraction of 1.50 to 1.52 and capable of surrounding another glass which is in fibrous form, said glass composition consisting essentially by weight of: Percent SiO2 61-65 A12O3 4-6 CaO up to 3 MgO 0.90-4 B2O312-16 Na2O 7-12 Li2O up to 4 F2 up to 3
Claim 7
Dependent Claim
19 words
The glass composition of claim 7 wherein the total amount of CaO and MgO is 3.5-4 percent by weight.
Claim 8
Dependent Claim
19 words
The glass composition of claim 7 wherein the total amount of Na2O and Li2O is 11-14 percent by weight.
Claim 9
Dependent Claim
16 words
The glass composition of claim 7 wherein 0.002-0.004 percent by weight of SeO2 is included therein.
Claim 10
Dependent Claim
79 words
A glass composition having an index of refraction of about 1.50 and capable of surrounding another glass which is in fibrous form; said other glass having an index of refraction of 1.56 to 1.64 whereby surrounding said other glass with said glass composition produces a composite optical fiber capable of transmitting light; said glass composition consisting essentially by weight of: Percent SiO2 63-65 A12O3 5-6 CaO 2- 3 MgO 0.50-1 B2O3 12-14 Na2O 6-8 Li2O 3-5 F2 1- 2
Claim 11
Dependent Claim
16 words
The glass composition of claim 11 wherein 0.002-0.004 percent by weight of SeO2 is included therein.
Claim 12
Dependent Claim
85 words
A light transmitting glass fiber comprising a core glass surrounded by a cladding glass, said core glass having an index of refraction greater than said cladding glass, and wherein the improvement comprises said core glass consisting essentially by weight of: Percent SiO2 23-41 A12O3 7-10 B2O3 2.5-11 K2O up to 10 BaO 34-59 and said cladding glass consisting essentially by weight of: Percent SiO2 61-65 A12O3 4-6 CaO up to 3 MgO 0.90-4 B2O3 12-16 Na2O 7-12 Li2O up to 4 F2 up to 3
Claim 13
Dependent Claim
54 words
The light transmitting glass fiber of claim 13 wherein said core glass consists essentially by weight of: Percent SiO2 30-32 A12O3 7-8 B2O3 6-7 K2O 5-7 BaO 46-49 and said cladding glass consists essentially by weight of: Percent SiO2 63-65 A12O35- 6 CaO 2-3 MgO 0.50-1 B2O3 12-14 Na2O 6-8 Li2O 3-5 F2 1-2
Claim 14
Dependent Claim
18 words
The light transmitting glass fiber of claim 13 wherein said core glass includes 0.01-0.05percent by weight of Sb2O3.
Claim 15
Dependent Claim
28 words
The light transmitting glass fiber of claim 13 wherein said core glass contains less than 0.05 percent by weight of the oxides of Cr, Cu, Fe and Mn.
Claim 16
Dependent Claim
36 words
The light transmitting glass fiber of claim 13 wherein said core glass includes 0.01-0.05 percent by weight of Sb2O3 and contains less than 0.05 percent by weight of the oxides of Cr, Cu, Fe and Mn.
Claim 17
Dependent Claim
19 words
The light transmitting glass fiber of claim 13 wherein said cladding glass includes 0.002-0.004 percent by weight of Se02.
Claim 18
Dependent Claim
19 words
The light transmitting glass fiber of claim 14 wherein said cladding glass includes 0.002-0.004 percent by weight of Se02.
Claim 19
Dependent Claim
18 words
A light transmitting optical fiber bundle comprising a plurality of the light transmitting glass fibers of claim 13.
Claim 20
Dependent Claim
18 words
A light transmitting optical fiber bundle comprising a plurality of the light transmitting glass fibers of claim 14.
Claim 21
Dependent Claim
18 words
A light transmitting optical fiber bundle comprising a plurality of the light transmitting glass fibers of claim 17.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |