Patent US3941574A successfully refreshed from Google Patents.
US3941574A
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US
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Method of preparing a glass batch for melting silicate glass
Assignee: Individual
•
Filing: 1973-05-21
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Granted: 1976-03-02
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Expires: 1993-05-21
Abstract
Abstract In preparing a glass batch for silicate glass melting, a high-modulus calcium-magnesium hydrosilicate is used as intensifier.
Inventors
- 👤 Garegin Sarkisovich Melkonian
- 👤 Laura Atomovna Meliksetian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:10
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/02; C03C13/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
A method of preparing a glass batch for melting silicate glass having an SiO 2 content over 51% and a low alkali metal oxide content of up to 2% which comprises grinding batch ingredients based on rocks and mixing said ingredients with a flux comprising high-modulus calcium-magnesium hydrosilicate x.CaO.y.MgO.n.SiO 2 m.H 2 O wherein the SiO 2 :CaO.MgO ratio is from 0.5 to 8 wherein the flux is produced by mixing silica, magnesia and calcia forming materials in an aqueous medium, heating the mixture to a temperature of 50°-200°C, holding the mixture at said temperature for at least 20 minutes, filtering and drying the resulting residue consisting of a high modulus calciummagnesium hydrosilicate.
Claim 2
Independent Claim
113 words
A method of preparing a glass batch for melting silicate glass having an SiO 2 content over 51% and a low alkali metal oxide content of up to 2% which comprises grinding batch ingredients based on rocks and mixing said ingredients with a flux comprising high-modulus calcium-magnesium hydrosilicate x.CaO.y.MgO.n.SiO 2 m.H 2 O wherein the SiO 2 :CaO.MgO ratio is from 0.5 to 8 wherein the flux is produced by mixing silica, magnesia and calcia forming materials in an aqueous medium, heating the mixture to a temperature of 50°-200°C, holding the mixture at said temperature for at least 20 minutes, filtering and drying the resulting residue consisting of a high modulus calciummagnesium hydrosilicate.
Claim 3
Dependent Claim
20 words
A method as claimed in claim 1, wherein the flux is produced in the presence of ingredients based on rocks.
Claim 4
Dependent Claim
32 words
A method as claimed in claim 1, wherein the flux is added to the batch in the form of dolomite and calcined dolotomite taken in amounts corresponding to the desired glass composition.
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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |