Patent US3091646A successfully refreshed from Google Patents.
Patent JPS51113822A successfully refreshed from Google Patents.
Patent US4054459A successfully refreshed from Google Patents.
US4054459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing glass batch
Assignee: Individual
•
Filing: 1975-11-19
•
Granted: 1977-10-18
•
Expires: 1995-11-19
Abstract
Abstract To prepare a glass batch use is made of aqueous solutions of bivalent metals or monovalent and bivalent metals as the starting materials and the pulp obtained on mixing thereof is dried and simultaneously granulated at a temperature of 150°-500° C. The batch is intended for the production of colorless silicate glass.
Inventors
- 👤 Garegin Sarkisovich Melkonian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:59
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/02; C03C1/026; Y; Y10; Y10S; Y10S106/00; Y10S106/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
A method for preparing a glass batch for colorless silicate glass comprising the steps of a. subjecting perlite to hydrothermal alkaline treatment and filtering to produce an aqueous solution of sodium trisilicate; b. mixing a part of the sodium trisilicate solution prepared in step (a) with a bivalent or trivalent metal oxide or hydroxide to form a precipitate of the silicate of said bivalent or trivalent metal and filtering to form a filtrate containing aqueous sodium hydroxide; c. mixing another part of the sodium trisilicate solution from step (a) with the metal silicate precipitate from step (b); and d. drying and simultaneously granulating the mixture from step (c) at a temperature of from 150° to 500° C. to form a cemented aggregate product, wherein the proportions of sodium trisilicate and bivalent or trivalent metal silicate used in step (c) are determined by the desired composition of the glass.
Claim 2
Independent Claim
148 words
A method for preparing a glass batch for colorless silicate glass comprising the steps of a. subjecting perlite to hydrothermal alkaline treatment and filtering to produce an aqueous solution of sodium trisilicate; b. mixing a part of the sodium trisilicate solution prepared in step (a) with a bivalent or trivalent metal oxide or hydroxide to form a precipitate of the silicate of said bivalent or trivalent metal and filtering to form a filtrate containing aqueous sodium hydroxide; c. mixing another part of the sodium trisilicate solution from step (a) with the metal silicate precipitate from step (b); and d. drying and simultaneously granulating the mixture from step (c) at a temperature of from 150° to 500° C. to form a cemented aggregate product, wherein the proportions of sodium trisilicate and bivalent or trivalent metal silicate used in step (c) are determined by the desired composition of the glass.
Claim 3
Dependent Claim
49 words
The method of claim 1 wherein for the manufacture of sodium- calciumm- magnesium glass, said metal silicate precipitate in step (c) consists of high-modulus calcium and magnesium silicates and the mixing in step (c) is heated to a temperature of from 100° to 180° C. prior to step (d).
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the aqueous sodium hydroxide formed in step (b) is recycled for use in step (a).
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) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |