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US5145805A Expired / Lapsed US ⏱️ 0.0 years remaining

Glass compositions

Assignee: Isuzu Glass Co Ltd
•
Filing: 1991-08-13
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Granted: 1992-09-08
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Expires: 2011-08-13
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Abstract

Abstract The invention provides: (1) a glass composition comprising about 20 to about 85% of SiO 2 , about 2 to about 75% of B 2 O 3 , 15% or less of Al 2 O 3 , about 30% or less of at least one of Li 2 O, Na 2 O, K 2 O, Rb 2 O and Cs 2 O, about 10% or less of at least one of MgO, CaO, ZnO, BaO, SrO and PhO, about 10% or less of at least one of ZrO 2 , La 2 O 3 , Y 2 O 3 , Ta 2 O 3 and Gd 2 O 3 , and about 0.05 to about 15% of at least one copper halide; and (2) a glass composition comprising about 8 to about 25% of SiO 2 , about 5 to about 35% of P 2 O 5 , about 30% or less of B 2 O 3 , about 10 to about 35% of Al 2 O 3 , about 5 to about 20% of at least one of LI 2 O, Na 2 O, K 2 O, Rb 2 O and Cs 2 O, about 20% or less of at least one of MgO, CaO, ZnO, BaO, SrO and PbO, about 10% or less of at least one of ZrO 2 , La 2 O 3 , Y 2 O 3 , Ta 2 O 3 and Gd 2 O 3 , and about 0.05 to about 15% of at least one copper halide.

Inventors

  • 👤 Takashi Tarumi
  • 👤 Toshihiko Einishi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 11:02
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/062; C03C3/064; C03C4/00; C03C4/08; C03C4/085; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/905

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 133 words
A glass composition consisting essentially of about 8 to about 25% of SiO 2 , about 5 to about 35% of P 2 O 5 , about 30% or less of B 2 O 3 , about 10 to about 35% of Al 2 O 3 , about 5 to about 20% of at least one of Li 2 O, Na 2 O, K 2 O, Rb 2 O and Cs 2 O, about 20% or less of at least one of MgO, CaO, ZnO, BaO, SrO and PbO, about 10% or less of at least one of ZrO 2 , La 2 O 3 , Y 2 O 3 , Ta 2 O 3 and Gd 2 O 3 , and about 0.05 to about 15% of at least one copper halide.
Claim 2
Dependent Claim 133 words
A glass composition consisting essentially of about 8 to about 25% of SiO 2 , about 5 to about 35% of P 2 O 5 , about 30% or less of B 2 O 3 , about 10 to about 35% of Al 2 O 3 , about 5 to about 20% of at least one of Li 2 O, Na 2 O, K 2 O, Rb 2 O and Cs 2 O, about 20% or less of at least one of MgO, CaO, ZnO, BaO, SrO and PbO, about 10% or less of at least one of ZrO 2 , La 2 O 3 , Y 2 O 3 , Ta 2 O 3 and Gd 2 O 3 , and about 0.05 to about 15% of at least one copper halide.
Claim 3
Dependent Claim 139 words
A glass composition according to claim 1 which consisting essentially of about 10 to about 20% of SiO 2 , about 10 to about 30% of P 2 O 5 , about 10 to about 25% of B 2 O 3 , about 15 to about 25% of Al 2 O 3 , about 5 to about 15% of at least one of Li 2 O, Na 2 O, K 2 O, Rb 2 O and Cs 2 O, about 5% or less of at least one of MgO, CaO, ZnO, BaO, SrO and PbO, about 5% or less of at least one of ZrO 2 , La 2 O 3 , Y 2 O 3 , Ta 2 O 3 and Gd 2 O 3 , and about 0.3 to about 8% of at least one copper halide.
Claim 4
Dependent Claim 39 words
A glass composition according to claim 1 which intercepts light beams at less than a characteristic absorption wavelength within the range of 350 to 450 nm and substantially permits the passage of light beams at longer than said wavelength.
Claim 5
Dependent Claim 84 words
A process for selectively absorbing ultraviolet radiation, comprising (i) providing a glass composition according to claim 1 between an object sensitive to ultraviolet radiation and a light source which radiates light having wavelengths within the range of from 250 to 800 nm; (ii) intercepting light beams at less than a characteristic absorption wavelength within the range of 350 to 450 nm; and (iii) substantially completely permitting light beams at longer than said wavelength to pass through said glass composition and impinge upon said object.

References Cited (Backward Citations)

US2651145A Cited
US4106946A Cited
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US4297142A Cited
US4222781A Cited
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SU1089067A1 Cited
EP0321297A1 Cited
US5024974A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-09-08 1996-03-09 1996-09-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-09-08 2000-03-09 2000-09-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-09-08 2004-03-09 2004-09-08 $7700.00 Window Closed / Lapsed

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