US4243423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass manufacturing
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1979-10-10
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Granted: 1981-01-06
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Expires: 1999-10-10
Abstract
Abstract An improvement is provided in forming a B 2 O 3 containing glass from heated glass batch agglomerates by using an uncalcined, mineral sodium calcium borate which contains chemically bound water to form the agglomerates. These agglomerates can be heated, prior to melting, to a temperature in excess of that needed to substantially remove all of said chemically bound water without the water release causing the agglomerates to disintegrate.
Inventors
- 👤 Charles M. Hohman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:03
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/02; C03C1/026
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
In a glass manufacturing method comprising combining batch ingredients and water into agglomerates, heating said agglomerates, discharging said agglomerates to a melting furnace for melting, the improvement wherein said glass is a B 2 O 3 containing glass and wherein said batch ingredients contain an uncalcined, mineral sodium calcium borate as a major source of B 2 O 3 .
Claim 2
Dependent Claim
60 words
In a glass manufacturing method comprising combining batch ingredients and water into agglomerates, heating said agglomerates, discharging said agglomerates to a melting furnace for melting, the improvement wherein said glass is a B 2 O 3 containing glass and wherein said batch ingredients contain an uncalcined, mineral sodium calcium borate as a major source of B 2 O 3 .
Claim 3
Dependent Claim
33 words
The improvement of claim 1 wherein said borate is present as a compound of the formula NaCaB 5 O 9 .X H 2 O wherein X is between about 5 to about 8.
Claim 4
Dependent Claim
12 words
The improvement of claim 2 wherein said borate is present as ulexite.
Claim 5
Dependent Claim
12 words
The improvement of claim 2 wherein said borate is present as probertite.
Claim 6
Dependent Claim
25 words
The improvement of claim 2 wherein said agglomerates are pellets, said pellets being heated to a temperature in excess of about 500° C. without disintegration.
Claim 7
Dependent Claim
25 words
The improvement of claim 1 wherein said glass also contains Na 2 O, said batch containing sodium carbonate a source of said Na 2 O.
Claim 8
Dependent Claim
10 words
The improvement of claim 6 wherein said borate is ulexite.
Claim 9
Dependent Claim
42 words
The improvement of claim 1 wherein said borate contains at least 5 moles of chemically bound water and wherein said heating is done at a temperature in excess of that needed to remove substantially all of said chemically bound water without disintegration.
Claim 10
Dependent Claim
49 words
A B 2 O 3 glass forming pellet having a temperature in excess of about 500° C., said pellet having been formed by combining batch ingredients and water and wherein said batch ingredients contain an uncalcined, mineral sodium calcium borate with in excess of 5 moles of chemical water.
Claim 11
Dependent Claim
49 words
A B 2 O 3 glass forming pellet having a temperature in excess of about 500° C., said pellet having been formed by combining batch ingredients and water and wherein said batch ingredients contain an uncalcined, mineral sodium calcium borate with in excess of 5 moles of chemical water.
Claim 12
Dependent Claim
78 words
The improvement of claim 6 wherein said glass contains about 12 to about 16 weight percent of Na 2 O and about 4 to about 12 weight percent B 2 O 3 , and wherein the soda-ash is substantially the sole source of Na 2 O and substantially the sole source of B 2 O 3 being ulexite and/or probertite, said agglomerates having synergistically improved dry strengths by virtue of said soda-ash and said ulexite and or probertite.
References Cited (Backward Citations)
US2366473A
Cited
US2877124A
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US3274006A
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US3880639A
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US3914364A
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US4050947A
Cited
US4074989A
Cited
US4074990A
Cited
US4074991A
Cited
US4074990B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |