Patents by Inventor Otto S. de Pierne

Otto S. de Pierne has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4576612
    Abstract: A rosette shaped polishing pad includes a tough, flexible substrate, which is coated on one side with a layer of pressure sensitive adhesive for securing the pad to a polishing lap or the like, and on its opposite side with a flexible, water soluble matrix containing polishing particles such as cerium oxide, zirconium oxide, iron oxide, or the like, having a particle size in the range of approximately 0.5 to 15 microns. The polishing layer is produced by mixing a water soluble polyalkylene oxide/phenolic complex with an acrylic latex, and an alcohol slurry containing polishing particles in the form of, for example, cerium oxide particles. In use, water at any desired flow rate is applied to the interface between the lens which is being polished and the layer of polishing material on the pad.
    Type: Grant
    Filed: June 1, 1984
    Date of Patent: March 18, 1986
    Assignee: Ferro Corporation
    Inventors: Jayendra G. Shukla, Ki G. Sohn, Carl Twickler, Otto S. de Pierne