US4422862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reusing scrap glass
Assignee: Owens Corning
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Filing: 1982-03-12
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Granted: 1983-12-27
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Expires: 2002-03-12
Abstract
Abstract A process for feeding scrap glass to a glass melting furnace is disclosed. The scrap glass is fed onto a blanket of batch in the furnace so that organics are burned off before the scrap melts.
Inventors
- 👤 William G. Wardlaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:45
CPC Classifications
C; C03; C03B; C03B3/00; Y; Y02; Y02P; Y02P40/00; Y02P40/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A process for using scrap glass with organic material thereon including: feeding unmelted glass batch to a glass melting furnace to form a blanket of the batch on the surface of molten glass in the furnace; and feeding unmelted scrap glass with organic material thereon on top of the blanket in the furnace independently of the batch, the scrap glass being fed so that the organic material is burned off before the scrap glass begins to melt.
Claim 2
Dependent Claim
77 words
A process for using scrap glass with organic material thereon including: feeding unmelted glass batch to a glass melting furnace to form a blanket of the batch on the surface of molten glass in the furnace; and feeding unmelted scrap glass with organic material thereon on top of the blanket in the furnace independently of the batch, the scrap glass being fed so that the organic material is burned off before the scrap glass begins to melt.
Claim 3
Dependent Claim
88 words
A process for reusing scrap glass containing organics including the steps of: feeding unmelted raw glass batch to a glass melting furnace which forms a blanket floating on the surface of the resulting molten glass; feeding unmelted scrap glass on top of the raw glass batch blanket; feeding the scrap glass independently of the raw batch feed; and floating the scrap glass on top of the raw glass batch blanket for a period of time sufficient to burn off the organics before the scrap glass begins to melt.
Claim 4
Dependent Claim
88 words
A process for reusing scrap glass containing organics including the steps of: feeding unmelted raw glass batch to a glass melting furnace which forms a blanket floating on the surface of the resulting molten glass; feeding unmelted scrap glass on top of the raw glass batch blanket; feeding the scrap glass independently of the raw batch feed; and floating the scrap glass on top of the raw glass batch blanket for a period of time sufficient to burn off the organics before the scrap glass begins to melt.
Claim 5
Dependent Claim
25 words
A process according to claims 1 or 2 wherein the scrap glass is hammermilled or crushed before it is fed to the glass melting furnace.
Claim 6
Dependent Claim
27 words
A process according to claims 1 or 2 wherein the scrap glass is in the form of fluffy, fine textured scrap that floats on the batch blanket.
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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |