US3753743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing glass batch
Assignee: AGC Inc
•
Filing: 1971-12-17
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Granted: 1973-08-21
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Expires: 1991-12-17
Abstract
Abstract In a method for preparing a glass batch using caustic soda solution as the main source of Na2O for the glass, silica and other solid glass raw materials are first admixed and then the caustic soda solution is fed to the mixture. Preheated glass cullet is added to the mixture during the mixing operation, so that the water from the caustic soda solution is evaporated to provide a glass batch which is easily melted and refined and also is easily handled. Preferably, hot gas containing carbon dioxide is supplied during the mixing operation.
Inventors
- 👤 J Aki
- 👤 H Kakuda
- 👤 S Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:38
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/02; C03C1/026; C03B; C03B1/00; C03B1/02; Y; Y02; Y02P; Y02P40/00; Y02P40/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
65 words
A method according to claim 1, wherein the solid glass raw materials comprise silica sand and limestone or dolomite as the main components thereof and are first charged into the mixer, the supply of caustic soda solution and a hot gas are initiated while charging the raw materials, and the preheated glass cullet is charged while supplying the caustic soda solution and the hot gas.
Claim 2
Dependent Claim
17 words
A method according to claim 2, wherein the hot gas contains carbon dioxide gas to form carbonate.
Claim 3
Dependent Claim
47 words
A method according to claim 1, wherein the solid glass raw materials being used comprise: silica sand feldspar sodium sulfate limestone or dolomite soda ash balanced to caustic soda an amount of the glass cullet is 25 - 75 percent by weight, based on the total batch.
References Cited (Backward Citations)
US2976161A
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US3081180A
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US3451831A
Cited
US3503790A
Cited
US3573887A
Cited
US3630673A
Cited
US3542534A
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |