Patents by Inventor Calvin Richardson

Calvin Richardson 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).

  • Damage resistant decorative laminate
    Patent number: 4880689
    Abstract: Decorative laminate having improved resistance against marring, abrasion, staining and crocking, and method for the preparation thereof, the laminate comprising a substrate and a decorative sheet, the decorative sheet having on the exposed surface a layer consisting essentially of a thermoset resin, substantially fully hydrolyzed polyvinyl alcohol, fumed amorphous silica, and particulate abrasive material having a hardness higher than that of silica. Abrasion resistance greater than 3000 cycles (NEMA Wear) by the NEMA test LD 3-3.01 is obtained in combination with improved mar resistance.
    Type: Grant
    Filed: October 18, 1985
    Date of Patent: November 14, 1989
    Assignee: Formica Corporation
    Inventors: John J. Park, Paul W. White, Calvin Richardson
  • Process for the preparation of a fully hydrolyzed polyvinyl alcohol modified melamine-formaldehyde resin for application in decorative laminates
    Patent number: 4311804
    Abstract: A process for preparing a fully hydrolyzed polyvinyl alcohol modified melamine-formaldehyde resin useful in decorative laminates is disclosed. The process comprises reacting melamine, formaldehyde, and fully hydrolyzed polyvinyl alcohol at 80.degree.-90.degree. C. until the reaction product has a water tolerance of about 300% to 1000% in 5.degree. C. water. The mole ratio of melamine to formaldehyde is from about 1:1.5 to about 1:1.8, respectively.
    Type: Grant
    Filed: October 30, 1980
    Date of Patent: January 19, 1982
    Assignee: Formica Corporation
    Inventors: Ram S. Raghava, Calvin Richardson