US3843346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sheet glass by continuous float process
Assignee: PPG Industries Inc
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Filing: 1973-03-06
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Granted: 1974-10-22
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Expires: 1993-03-06
Abstract
Abstract 1. In the process of continuously forming a layer of glass on a supporting pool of molten metal wherein molten glass from a pool of molten glass is discharged substantially horizontally from a region as a layer onto the supporting pool of molten metal which has an upper surface at substantially the same elevation as that of the discharge layer of glass, the improvement which comprises the step of cooling the molten glass adjacent the discharge region sufficiently to cause molten glass in the pool of molten glass to flow at an increased rate to the discharge region.
Inventors
- 👤 C Edge
- 👤 G Kunkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:28
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/04; C03B5/00; C03B5/16; C03B5/18; C03B5/183; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
In the process of continuously forming a layer of glass on a supporting pool of molten metal wherein molten glass from a pool of molten glass is discharged substantially horizontally from a region as a layer onto the supporting pool of molten metal which has an upper surface at substantially the same elevation as that of the discharge layer of glass, the improvement which comprises the step of cooling the molten glass adjacent the discharge region sufficiently to cause molten glass in the pool of molten glass to flow at an increased rate to the discharge region.
Claim 2
Dependent Claim
97 words
In the process of continuously forming a layer of glass on a supporting pool of molten metal wherein molten glass from a pool of molten glass is discharged substantially horizontally from a region as a layer onto the supporting pool of molten metal which has an upper surface at substantially the same elevation as that of the discharge layer of glass, the improvement which comprises the step of cooling the molten glass adjacent the discharge region sufficiently to cause molten glass in the pool of molten glass to flow at an increased rate to the discharge region.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |