Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7409839 | Method and apparatus for making a glass sheet In the formation of sheet glass by the overflow downdraw process, the width of usable sheet glass is maximized by downwardly flowing edge portions of the sheet over web-like members and thereafter over extensions which intersect with and are downwardly inclined rela... | 08/12/2008 |
| 7238635 | Creep resistant zircon refractory material used in a glass manufacturing system A glass manufacturing system is described herein that has a forming device (e.g., isopipe) which is made from a zircon refractory material that has an improved creep resistance property. The zircon refractory material has a composition with at least the following el... | 07/03/2007 |
| 7155935 | Sheet glass forming apparatus One embodiment of the present invention is an improved sheet glass forming apparatus. In another embodiment, a precise thermal control system redistributes the flow of molten glass at the weirs to counteract the degradation of the sheet forming apparatus which inevi... | 01/02/2007 |
| 7041614 | Creep resistant zircon refractory material used in a glass manufacturing system A glass manufacturing system is described herein that has a forming device (e.g., isopipe) which is made from a zircon refractory material that has an improved creep resistance property. The zircon refractory material has a composition with at least the following el... | 05/09/2006 |
| 6997017 | Overflow downdraw glass forming method and apparatus The forming apparatus of the present invention preferably includes an orifice on top of the trough. The uniquely shaped orifice substitutes for the weirs as the controlling entity for glass thickness. The orifice is designed such that as it deforms, it maintains a l... | 02/14/2006 |
| 6502423 | Method and apparatus for making individual glass panes A method and apparatus is described, with which individual rectangular glass panes of thickness between 0.03 mm and 2 mm can be cut from a glass band (2) drawn vertically from a hot forming device (1) in an in-line process with reduced rejects and reduced... | 01/07/2003 |
| 4612030 | Method and apparatus for making variegated, cathedral, antique or flashed glass in a continuous sheet A method and apparatus are disclosed for making ornamental glass. A molten glass mixture, formed into a continuous plastic sheet, is subjected to a single or multiple bilateral stretching before being annealed.... | 09/16/1986 |
| 4204856 | Edge stretching apparatus including insulated seal An apparatus for sealing between edge control machines and forming chamber sidewalls is disclosed. The invention comprises collar means mounted surrounding the barrel of the edge control machine, alignment means fastened to the edge control machine for ma... | 05/27/1980 |
| 4203750 | Manufacture of flat glass A sheet of molten glass issuing from an overflow channel is supplied to the molten metal bath used in the formation of float glass. The overflow channel is positioned adjacent one end of such bath transversely of the longitudinal extent thereof, and the o... | 05/20/1980 |
| 3934994 | Control of thermal convection in a float glass forming chamber Thermal convection currents in the headspace above a body of glass being formed into a continuous sheet of glass while supported on molten metal are controlled to prevent the development of surface distortion patterns in the upper surface of the glass bei... | 01/27/1976 |
