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US4562161A Expired / Lapsed US ⏱️ 0.0 years remaining

Optical and ophthalmic glass with refractive indices greater than or equal to 1.56, Abbe numbers greater than or equal to 40 and densities less than or equal to 2.70 g/cm3

Assignee: Schott AG
•
Filing: 1983-02-18
•
Granted: 1985-12-31
•
Expires: 2003-02-18
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Abstract

Abstract An optical and ophthalmic glass with high refractive index, high Abbe number and low density, which is distinguished by good chemical stability, good crystallization behavior and capability for chemical hardening, comprises (in % by weight): SiO2-47 to 75 B2O3-1 to 20 Al2O3-0 to 10 P2O5-0 to 5 Li2O-0 to 15 Na2O-0 to 10 K2O-0 to 10 CaO-0 to 20 MgO-0 to 15 SrO-0 to 4 BaO-0 to 4 ZnO-0 to 5 TiO2-1 to 15 ZrO2-0 to 8 Nb2O5-0 to 5 and F--0 to 5.

Inventors

  • 👤 Karl Mennemann
  • 👤 Georg Gliemeroth
  • 👤 Ludwig Ross
  • 👤 Burkhard Speit
  • 👤 Volkmar Geiler
  • 👤 Hans-Georg Krolla
  • 👤 Lothar Meckel

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 17:02
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/097; C03C1/00; C03C1/004; C03C3/089; C03C3/091; C03C3/093; C03C3/095; C03C3/11; C03C3/112; C03C3/115; C03C3/118; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903

Claims Analysis

Total Claims: 19
Claim 1
Independent Claim 127 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49-68 B 2 O 3 --3-8 Al 2 O 3 --0.5-3 P 2 O 5 --0-1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60-78 Li 2 O--3-8 Na 2 O--4-10 K 2 O--0-10 sum of M 2 O (M=Li, Na, K)--9-17 CaO--2-6 MgO--0-3 SrO--0-4 BaO--0-4 ZnO--0-2.97 TiO 2 --5-12.8 ZrO 2 --0-6 Nb 2 O 5 --0.15-5 F---0-5 sum of CaO, MgO, SrO, BaO, ZnO--1.5-6 Y 2 O 3 --0-3.
Claim 2
Dependent Claim 127 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49-68 B 2 O 3 --3-8 Al 2 O 3 --0.5-3 P 2 O 5 --0-1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60-78 Li 2 O--3-8 Na 2 O--4-10 K 2 O--0-10 sum of M 2 O (M=Li, Na, K)--9-17 CaO--2-6 MgO--0-3 SrO--0-4 BaO--0-4 ZnO--0-2.97 TiO 2 --5-12.8 ZrO 2 --0-6 Nb 2 O 5 --0.15-5 F---0-5 sum of CaO, MgO, SrO, BaO, ZnO--1.5-6 Y 2 O 3 --0-3.
Claim 3
Dependent Claim 127 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49-68 B 2 O 3 --3-8 Al 2 O 3 --0.5-3 P 2 O 5 --0-1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60-78 Li 2 O--3-8 Na 2 O--5-7 K 2 O--0-6 sum of M 2 O (M=Li, Na, K)--15-17 CaO--0-5 MgO--0-3 SrO--0-4 BaO--0-4 ZnO--0-2.97 TiO 2 --5-12 ZrO 2 --0-6 Nb 2 O 5 --0.15-5 F---0-1 sum of CaO, MgO, SrO, BaO, ZnO--1.5-6 Y 2 O 3 --0-3.
Claim 4
Dependent Claim 127 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49-68 B 2 O 3 --3-8 Al 2 O 3 --0.5-3 P 2 O 5 --0-1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60-78 Li 2 O--3-8 Na 2 O--5-7 K 2 O--0-6 sum of M 2 O (M=Li, Na, K)--15-17 CaO--0-5 MgO--0-3 SrO--0-4 BaO--0-4 ZnO--0-2.97 TiO 2 --5-12 ZrO 2 --0-6 Nb 2 O 5 --0.15-5 F---0-1 sum of CaO, MgO, SrO, BaO, ZnO--1.5-6 Y 2 O 3 --0-3.
Claim 5
Dependent Claim 168 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49 to 68 B 2 O 3 --8 to 14 Al 2 O 3 --0.5 to 3 GeO 2 --0 to 3 P 2 O 5 --0 to 1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60 to 75 Li 2 O--6 to 12 Na 2 O--0.5 to 4.5 K 2 O--0 to 2 sum of Li 2 O, K 2 O and Na 2 O--8 to 15 MgO--1 to 6 CaO--2 to 8 ZnO--0 to 5 sum of MgO, CaO, ZnO--3 to 18 TiO 2 --4 to 9.5 ZrO 2 --0 to 3 Nb 2 O 5 --0.3 to 5 NaF--1 to 3.5 Y 2 O 3 --0 to 4.
Claim 6
Dependent Claim 168 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49 to 68 B 2 O 3 --8 to 14 Al 2 O 3 --0.5 to 3 GeO 2 --0 to 3 P 2 O 5 --0 to 1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60 to 75 Li 2 O--6 to 12 Na 2 O--0.5 to 4.5 K 2 O--0 to 2 sum of Li 2 O, K 2 O and Na 2 O--8 to 15 MgO--1 to 6 CaO--2 to 8 ZnO--0 to 5 sum of MgO, CaO, ZnO--3 to 18 TiO 2 --4 to 9.5 ZrO 2 --0 to 3 Nb 2 O 5 --0.3 to 5 NaF--1 to 3.5 Y 2 O 3 --0 to 4.
Claim 7
Dependent Claim 145 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --47 to 58 B 2 O 3 --12 to 16 Al 2 O 3 --0.5 to 2 Sum of SiO 2 , B 2 O 3 and Al 2 O 3 --68 to 78 Li 2 O--10 to 15 Na 2 O--4 to 6 K 2 O--0 to 1 Sum of Li 2 O, K 2 O and Na 2 O--15 to 17 CaO--4 to 8 MgO--4 to 7 ZnO--0 to 1 sum of CaO, MgO and ZnO--8 to 14 TiO 2 --7 to 10 ZrO 2 --0 to 2 Nb 2 O 5 --0 to 2 F---0.4 to 1.
Claim 8
Dependent Claim 145 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --47 to 58 B 2 O 3 --12 to 16 Al 2 O 3 --0.5 to 2 Sum of SiO 2 , B 2 O 3 and Al 2 O 3 --68 to 78 Li 2 O--10 to 15 Na 2 O--4 to 6 K 2 O--0 to 1 Sum of Li 2 O, K 2 O and Na 2 O--15 to 17 CaO--4 to 8 MgO--4 to 7 ZnO--0 to 1 sum of CaO, MgO and ZnO--8 to 14 TiO 2 --7 to 10 ZrO 2 --0 to 2 Nb 2 O 5 --0 to 2 F---0.4 to 1.
Claim 9
Dependent Claim 145 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --47 to 51 B 2 O 3 --10 to 18 Al 2 O 3 --0 to 4 Sum of SiO 2 , B 2 O 3 and Al 2 O 3 --58 to 62 Li 2 O--4 to 12 Na 2 O--2 to 6 K 2 O--0 to 4 Sum of Li 2 O, K 2 O and Na 2 O--8 to 16 CaO--1 to 7 MgO--0 to 5 ZnO--0 to 4 sum of CaO, MgO and ZnO--5 to 12 TiO 2 --5 to 8 ZrO 2 --0 to 2 Nb 2 O 5 --0 to 3 F---0.4 to 1.
Claim 10
Dependent Claim 145 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --47 to 51 B 2 O 3 --10 to 18 Al 2 O 3 --0 to 4 Sum of SiO 2 , B 2 O 3 and Al 2 O 3 --58 to 62 Li 2 O--4 to 12 Na 2 O--2 to 6 K 2 O--0 to 4 Sum of Li 2 O, K 2 O and Na 2 O--8 to 16 CaO--1 to 7 MgO--0 to 5 ZnO--0 to 4 sum of CaO, MgO and ZnO--5 to 12 TiO 2 --5 to 8 ZrO 2 --0 to 2 Nb 2 O 5 --0 to 3 F---0.4 to 1.
Claim 11
Dependent Claim 22 words
A glass of claim 1, further consisting essentially of (in % by weight): SrO--0 to 4 BaO--0 to 4 PbO--0 to 5.
Claim 12
Dependent Claim 22 words
A glass of claim 2 further consisting essentially of (in % by weight): SrO--0 to 4 BaO--0 to 4 PbO--0 to 5.
Claim 13
Dependent Claim 25 words
A glass of claim 6, wherein the sum of SrO, BaO, ZnO and PbO (in % by weight), is less than or equal to 10.
Claim 14
Dependent Claim 92 words
A glass of claim 1, further consisting essentially of Nb 2 O 5 --0 to 5 Y 2 O 3 --0 to 4 La 2 O 3 --0 to 8 Ta 2 O 5 --0 to 3 SnO 2 --0 to 3.0 in addition to or instead of NaF Bi 2 O 3 --0 to 2.0 Yb 2 O 3 --0 to 3.5 Ce 2 O 3 --0 to 3 Sb 2 O 3 --0 to 2.5 TeO 2 --0 to 2 SeO 2 --0 to 2 WO 3 --0 to 5.
Claim 15
Dependent Claim 32 words
A glass of claim 1, further consisting essentially of (in % by weight): La 2 O 3 --0 to 8 WO 3 --0 to 5 Ta 2 O 5 --0 to 3.
Claim 16
Dependent Claim 127 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49-68 B 2 O 3 --3-8 Al 2 O 3 --0.5-3 P 2 O 5 --0-1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60-78 Li 2 O--3-8 Na 2 O--4-10 K 2 O--0-10 sum of M 2 O (M=Li, Na, K)--9-17 CaO--2-6 MgO--0-3 SrO--0-4 BaO--0-4 ZnO--0-2.97 TiO 2 --5-12.8 ZrO 2 --0-6 Nb 2 O 5 --0-3 F---0.5-5 sum of CaO, MgO, SrO, BaO, ZnO--1.5-6 Y 2 O 3 --0-3.
Claim 17
Dependent Claim 127 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49-68 B 2 O 3 --3-8 Al 2 O 3 --0.5-3 P 2 O 5 --0-1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60-78 Li 2 O--3-8 Na 2 O--4-10 K 2 O--0-10 sum of M 2 O (M=Li, Na, K)--9-17 CaO--2-6 MgO--0-3 SrO--0-4 BaO--0-4 ZnO--0-2.97 TiO 2 --5-12.8 ZrO 2 --0-6 Nb 2 O 5 --0-3 F---0.5-5 sum of CaO, MgO, SrO, BaO, ZnO--1.5-6 Y 2 O 3 --0-3.
Claim 18
Dependent Claim 127 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49-68 B 2 O 3 --3-8 Al 2 O 3 --0.5-3 P 2 O 5 --0-1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60-78 Li 2 O--3-8 Na 2 O--5-7 K 2 O--0-6 sum of M 2 O (M=Li, Na, K)--15-17 CaO--0-5 MgO--0-3 SrO--0-4 BaO--0-4 ZnO--0-2.97 TiO 2 --5-12 ZrO 2 --0-6 Nb 2 O 5 --0-3 F---0.5-1 sum of CaO, MgO, SrO, BaO, ZnO--1.5-6 Y 2 O 3 --0-3.
Claim 19
Dependent Claim 127 words
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm 3 , consisting essentially of (in % by weight): SiO 2 --49-68 B 2 O 3 --3-8 Al 2 O 3 --0.5-3 P 2 O 5 --0-1.5 sum of SiO 2 , B 2 O 3 , Al 2 O 3 and P 2 O 5 --60-78 Li 2 O--3-8 Na 2 O--5-7 K 2 O--0-6 sum of M 2 O (M=Li, Na, K)--15-17 CaO--0-5 MgO--0-3 SrO--0-4 BaO--0-4 ZnO--0-2.97 TiO 2 --5-12 ZrO 2 --0-6 Nb 2 O 5 --0-3 F---0.5-1 sum of CaO, MgO, SrO, BaO, ZnO--1.5-6 Y 2 O 3 --0-3.

References Cited (Backward Citations)

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GB2029401A Cited
JPS5659640A Cited
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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) 1988-12-30 1989-07-01 1989-12-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-12-30 1993-07-01 1993-12-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-12-30 1997-07-01 1997-12-31 $7700.00 Window Closed / Lapsed

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