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| Number | Title | Issue Date |
| 5114338 | Furnace for heating highly pure quartz preform for optical fiber A heating furnace for heating a porous preform made of fine particles of highly pure quartz glass for an optical fiber, which furnace comprises a cylindrical furnace body, a heater installed in said furnace body and a muffle tube installed inside said hea... | 05/19/1992 |
| 4738618 | Vertical thermal processor Vertically oriented thermal processor, also known as a vertical diffusion furnace for the processing of silicon or gallium arsenide wafers or substrates including a vertically positionable furnace assembly, and a quartz bell-jar shaped element which posit... | 04/19/1988 |
| 4586897 | Installation including a heating furnace for continuous castings, which are cut to length, from a continuous casting installation In an installation including a heating furnace in the rolling mill and a continuous casting apparatus, there is provided a transportable temperature holding chamber for the castings which are cut to length, in which chamber the castings are transported in... | 05/06/1986 |
| 4543059 | Slotted cantilever diffusion tube system and method and apparatus for loading A cantilever tube for carrying loaded wafer boats into a diffusion furnace and confining flow of gas through the wafers includes an elongated slot extending from an open end of the tube to a predetermined region in which the wafer boats are positioned, th... | 09/24/1985 |
| 4490111 | Apparatus for making stacked high voltage rectifiers A process for making stacked high voltage rectifiers includes initially doping a plurality of silicon wafers with paint-on dopants applied with an applicator that is gradually moved from the center to the outer edge of each wafer while the wafer is periph... | 12/25/1984 |
| 4459104 | Cantilever diffusion tube apparatus and method A cantilever diffusion tube apparatus includes a quartz cantilever tube having a support end clamped to a laterally movable carriage mechanism and an outer end portion containing a plurality of spaced semiconductor wafers. The cantilever tube is coaxially... | 07/10/1984 |
| 4315486 | Floating radiant tube sheets for vertical tube reformers and the like Floatable tube sheets are provided for use in a reformer furnace or the like wherein a plurality of vertically oriented catalyst tubes are disposed in the fire box with the upper tube ends extending through the fire box roof. The tube sheets are located p... | 02/16/1982 |
| 4154433 | Continuous atmosphere controlled furnaces Disclosed is a continuous atmosphere controlled furnace for aluminum brazing and other purposes. A plurality of pots are suspended from a circular roof rotatable in a horizontal plane and arranged in a circle having a center on the axis of rotation of the... | 05/15/1979 |
| 4032290 | High temperature furnace muffle A muffle seal for a high temperature furnace in which a quartz or similar muffle is attached to an associated metal structure to provide substantial sealing of gas in the muffle even at extremely high operating temperatures. As employed in a multi-zone fu... | 06/28/1977 |
