US3127261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making sheet glass
Assignee: —
•
Filing: 1960-03-03
•
Granted: 1964-03-31
•
Expires: 1980-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:03
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/18; C03B15/00; C03B15/02; C03B15/04; C03B18/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A PROCESS FOR MAKING FLAT GLASS, COMPRISING THE STEPS OF REFINING GLASS IN A TANK FURNACE, PRODUCING A SUBSTANTIALLY HORIZONTAL FLOW OF MOLTEN GLASS FROM SAID TANK FURNACE TO A DRAW POT OVER A HIGHLY HEAT-CONDUCTIVE LAYER WHICH IS FLUID AT THE TEMPERATURE OF SAID MOLTEN GLASS AND CONSISTING OF AN ANTIFRICTION AGENT DENSER THAN THE GLASS, IMMISCIBLE THEREWITH AND CHEMICALLY INERT WITH RESPECT THERETO, COOLING THE TOP SURFACE OF SAID FLOW SUFFICIENTLY TO CAUSE THE FORMATION OF A MORE VISCOUS VITREOUS FIRST SKIN THEREALONG, COOLING THE UNDERSIDE OF SAID LAYER AT A SIMILAR RATE SUFFICIENT TO CAUSE THE FORMATION OF A VITREOUS SECOND SKIN OF SIMILAR VISCOSITY ALONG THE LOWER SURFACE OF SAID FLOW, CONTINUOUSLY DRAWING SAID SKINS ALONG WITH A MORE FLUID INTERVENING PORTION OF SAID FLOW FROM SAID DRAW POT, AND SOLIDIFYING THE DRAWN GLASS MASS INTO A SHEET, SAID RATE OF COOLING BEING UPWARDS OF SUBSTANTIALLY 150*C. PER METER.
Claim 2
Dependent Claim
153 words
A PROCESS FOR MAKING FLAT GLASS, COMPRISING THE STEPS OF REFINING GLASS IN A TANK FURNACE, PRODUCING A SUBSTANTIALLY HORIZONTAL FLOW OF MOLTEN GLASS FROM SAID TANK FURNACE TO A DRAW POT OVER A HIGHLY HEAT-CONDUCTIVE LAYER WHICH IS FLUID AT THE TEMPERATURE OF SAID MOLTEN GLASS AND CONSISTING OF AN ANTIFRICTION AGENT DENSER THAN THE GLASS, IMMISCIBLE THEREWITH AND CHEMICALLY INERT WITH RESPECT THERETO, COOLING THE TOP SURFACE OF SAID FLOW SUFFICIENTLY TO CAUSE THE FORMATION OF A MORE VISCOUS VITREOUS FIRST SKIN THEREALONG, COOLING THE UNDERSIDE OF SAID LAYER AT A SIMILAR RATE SUFFICIENT TO CAUSE THE FORMATION OF A VITREOUS SECOND SKIN OF SIMILAR VISCOSITY ALONG THE LOWER SURFACE OF SAID FLOW, CONTINUOUSLY DRAWING SAID SKINS ALONG WITH A MORE FLUID INTERVENING PORTION OF SAID FLOW FROM SAID DRAW POT, AND SOLIDIFYING THE DRAWN GLASS MASS INTO A SHEET, SAID RATE OF COOLING BEING UPWARDS OF SUBSTANTIALLY 150*C. PER METER.
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) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |