GB812576A - Improvements in or relating to glass composition - Google Patents

Improvements in or relating to glass composition

Info

Publication number
GB812576A
GB812576A GB2762856A GB2762856A GB812576A GB 812576 A GB812576 A GB 812576A GB 2762856 A GB2762856 A GB 2762856A GB 2762856 A GB2762856 A GB 2762856A GB 812576 A GB812576 A GB 812576A
Authority
GB
United Kingdom
Prior art keywords
relating
glass composition
glass
gms
sept
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2762856A
Inventor
James Earle Duncan
Samuel Lansing Seymour
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PPG Industries Inc
Original Assignee
Pittsburgh Plate Glass Co
Filing date
Publication date
Priority to BE551390D priority Critical patent/BE551390A/xx
Application filed by Pittsburgh Plate Glass Co filed Critical Pittsburgh Plate Glass Co
Priority to CH359251D priority patent/CH359251A/en
Publication of GB812576A publication Critical patent/GB812576A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron

Abstract

812,576. Glass. PITTSBURGH PLATE GLASS CO. Sept. 10, 1956, No. 27628/56. Class 56. Optical glasses having refractive indices 1À54-1À62 and densities 2À6-2À75 gms/cm<SP>3</SP> are made from the following constituents (weights per cent.) :-
GB2762856A 1956-09-10 1956-09-10 Improvements in or relating to glass composition Expired GB812576A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE551390D BE551390A (en) 1956-09-10
CH359251D CH359251A (en) 1956-09-10 1956-09-26 Low density glass with a relatively high refractive index

Publications (1)

Publication Number Publication Date
GB812576A true GB812576A (en) 1959-04-29

Family

ID=1740682

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2762856A Expired GB812576A (en) 1956-09-10 1956-09-10 Improvements in or relating to glass composition

Country Status (1)

Country Link
GB (1) GB812576A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5079514A (en) * 1973-11-16 1975-06-28
US3954487A (en) * 1972-02-08 1976-05-04 Jenaer Glaswerk Schott & Gen. Chemically hardened spectacle crown glass
DE2729706A1 (en) * 1977-07-01 1979-01-11 Leitz Ernst Gmbh BOROSILICATE GLASSES CONTAINING ZIRCONIA WITH REFRACTURES N DEPTH E IN THE RANGE OF 1.55 SMALLER THAN N DEEP E SMALLER THAN 1.72, ABBE NUMBERS NY DEEP E IN THE AREA OF 50 GREATER THAN NY DEPTH E GREATER THAN 34 TEAMS AND NEGATIVE NEGATIVES BETWEEN -3.0 AND -7.7 AND THE METHOD OF MANUFACTURING IT
DE3206226A1 (en) * 1982-02-20 1983-09-01 Schott Glaswerke, 6500 Mainz Optical and ophthalmic glass having a refractive index of >/=1.56, an Abbe number of >/=40 and a density of </=2.70 g/cm<3>
FR2550187A1 (en) * 1983-08-02 1985-02-08 Corning Glass Works LOW DENSITY AND HIGH REFRACTIVE INDEXES FOR OPHTHALMIC AND OPTICAL APPLICATIONS
AU688755B2 (en) * 1993-02-13 1998-03-19 Proceram Unleaded transparent vitreous glass composition and articles
FR2767814A1 (en) * 1997-09-03 1999-03-05 Schott Glas OPTICAL FLINT BASED ON BARIUM AND LEAD FREE
DE19828992C1 (en) * 1998-06-29 1999-10-07 Schott Glas Lead-free optical glass of barium light flint glass, barium crown glass, crown glass, crown flint glass or boron crown glass type
US5976999A (en) * 1992-07-01 1999-11-02 Proceram Unleaded transparent vitreous ceramic compositions
DE19827568C1 (en) * 1998-06-20 2000-01-05 Schott Glas Lead-free optical barium flint glasses, light flint glasses and crown glasses

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954487A (en) * 1972-02-08 1976-05-04 Jenaer Glaswerk Schott & Gen. Chemically hardened spectacle crown glass
JPS5079514A (en) * 1973-11-16 1975-06-28
DE2729706A1 (en) * 1977-07-01 1979-01-11 Leitz Ernst Gmbh BOROSILICATE GLASSES CONTAINING ZIRCONIA WITH REFRACTURES N DEPTH E IN THE RANGE OF 1.55 SMALLER THAN N DEEP E SMALLER THAN 1.72, ABBE NUMBERS NY DEEP E IN THE AREA OF 50 GREATER THAN NY DEPTH E GREATER THAN 34 TEAMS AND NEGATIVE NEGATIVES BETWEEN -3.0 AND -7.7 AND THE METHOD OF MANUFACTURING IT
DE3206226A1 (en) * 1982-02-20 1983-09-01 Schott Glaswerke, 6500 Mainz Optical and ophthalmic glass having a refractive index of >/=1.56, an Abbe number of >/=40 and a density of </=2.70 g/cm<3>
FR2550187A1 (en) * 1983-08-02 1985-02-08 Corning Glass Works LOW DENSITY AND HIGH REFRACTIVE INDEXES FOR OPHTHALMIC AND OPTICAL APPLICATIONS
US5976999A (en) * 1992-07-01 1999-11-02 Proceram Unleaded transparent vitreous ceramic compositions
AU688755B2 (en) * 1993-02-13 1998-03-19 Proceram Unleaded transparent vitreous glass composition and articles
FR2767814A1 (en) * 1997-09-03 1999-03-05 Schott Glas OPTICAL FLINT BASED ON BARIUM AND LEAD FREE
DE19827568C1 (en) * 1998-06-20 2000-01-05 Schott Glas Lead-free optical barium flint glasses, light flint glasses and crown glasses
DE19828992C1 (en) * 1998-06-29 1999-10-07 Schott Glas Lead-free optical glass of barium light flint glass, barium crown glass, crown glass, crown flint glass or boron crown glass type

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