Ferro Corporation

Other

Alan G King

Anthony S Scheibelhoffer

James H Heasley

Paul J DeFranco

Leon Levine

A method for isostatic pressing of formed powder, porous powder compact, and composite intermediates and the intermediate and final products produced thereby. The method includes the steps of:

Method for isostatic pressing of formed powder, porous powder compact,

Lens grinding or polishing pads are provided, characterized by a bonding system which permits them to be quickly and easily contact-adhered to the surface of a lens finishing tool, but which pads at the same time display strong resistance to lateral displacement during use. These pads can also be readily and easily stripped from the finishing tool without deformation or damage to them.

Adhesive system for maintaining flexible workpiece to a rigid substrate

A composite material and method of preparing same for use in prosthetic dentistry. The composition includes silica glass containing between about 8.0-30% on a weight basis of alkaline earth metal oxides and/or alkali metal oxides in solution selected from the group consisting of calcium oxide, magnesium oxide, sodium oxide, potassium, and lithium oxide. In one form of the invention, a methacrylate resin is coupled to the silica glass by a silane mixture. The invention includes the method of forming the composite material through both a cold curing system and a heat cured system into a composite veneering and tooth material which is useful in forming crowns and other dental restorations as well as artificial teeth requiring aesthetic appearance of normal dentition. The finally formed dental material shows a high hardness factor in combination with a high wear resistance. The composite material has the capability of being highly polishable and provides for low toxicity as well as a low index which allows optical matching of the composite material to naturally formed teeth.

Composite dental material and method of preparing same

A retroreflective device is disclosed comprising a convex-concavo lens having a cube-corner array extending across its concavity. The device returns in the same direction from which it is received a large proportion of incident light. The lens body is adapted with respect to reflected light to indicate a larger than actual area of the cube-corner array. The retroreflective device may be used as a marker, such as a roadmarker, the convex side of the lens body being exposed to receive the incident light.

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Macedonia, OH, United States of America

Alan G King