GB778355A - Glass compositions - Google Patents
Glass compositionsInfo
- Publication number
- GB778355A GB778355A GB34139/55A GB3413955A GB778355A GB 778355 A GB778355 A GB 778355A GB 34139/55 A GB34139/55 A GB 34139/55A GB 3413955 A GB3413955 A GB 3413955A GB 778355 A GB778355 A GB 778355A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- per
- per cent
- glass compositions
- cdo
- 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
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
- C03C3/11—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen
- C03C3/112—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine
-
- 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
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
-
- 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
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
-
- 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
- C03C3/078—Glass compositions containing silica with 40% to 90% silica, by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
-
- 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
- C03C3/102—Glass compositions containing silica with 40% to 90% silica, by weight containing lead
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
Landscapes
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Glass Compositions (AREA)
Abstract
778,355. Glass. PITTSBURGH PLATE GLASS CO. Nov. 29, 1955 [Dec. 29, 1954], No. 34139/55. Class 56. A glass, particularly for the minor segment of a multifocal opthalmic lens and having a softening point above 1382‹F, a coefficient of thermal expansion 7.0 to 10.0 Î 10<SP>-6</SP> per degree between 25 and 300‹C, and an index of refraction (D line) between 1.57 and 1.67 comprises (per centage parts by weight) SiO 2 , 35-52; one or more of the alkali metal oxides, 6-12; BaO, 28-34; ZrO 2 , 2-15; and one or more oxides selected from CaO, ZnO, PbO, CdO, SrO 5-15 but preferably not more than 10 per cent any one. Optionally there may be present TiO 2 up to 5; Al 2 O 3 up to 5; fining agents (e.g. As 2 O 5 and Sb 2 O 4 ) up to 2 and fluorine up to 1.5 per cent.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US334252XA | 1954-12-29 | 1954-12-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB778355A true GB778355A (en) | 1957-07-03 |
Family
ID=21870325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34139/55A Expired GB778355A (en) | 1954-12-29 | 1955-11-29 | Glass compositions |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH334252A (en) |
DE (1) | DE1000574B (en) |
GB (1) | GB778355A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4567104A (en) * | 1983-06-24 | 1986-01-28 | Canyon Materials Research & Engineering | High energy beam colored glasses exhibiting insensitivity to actinic radiation |
US4894303A (en) * | 1983-06-24 | 1990-01-16 | Canyon Materials Research & Engineering | High energy beam-sensitive glasses |
US6524756B1 (en) | 1996-10-31 | 2003-02-25 | Canyon Materials, Inc. | Gray scale all-glass photomasks |
US6562523B1 (en) | 1996-10-31 | 2003-05-13 | Canyon Materials, Inc. | Direct write all-glass photomask blanks |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4732794A (en) * | 1986-10-02 | 1988-03-22 | Mobay Corporation | Porcelain enamel composition and substrates coated therewith |
-
1955
- 1955-11-29 GB GB34139/55A patent/GB778355A/en not_active Expired
- 1955-12-27 CH CH334252D patent/CH334252A/en unknown
- 1955-12-28 DE DEP15389A patent/DE1000574B/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4567104A (en) * | 1983-06-24 | 1986-01-28 | Canyon Materials Research & Engineering | High energy beam colored glasses exhibiting insensitivity to actinic radiation |
US4894303A (en) * | 1983-06-24 | 1990-01-16 | Canyon Materials Research & Engineering | High energy beam-sensitive glasses |
US6524756B1 (en) | 1996-10-31 | 2003-02-25 | Canyon Materials, Inc. | Gray scale all-glass photomasks |
US6562523B1 (en) | 1996-10-31 | 2003-05-13 | Canyon Materials, Inc. | Direct write all-glass photomask blanks |
Also Published As
Publication number | Publication date |
---|---|
CH334252A (en) | 1958-11-30 |
DE1000574B (en) | 1957-01-10 |
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