Patents by Inventor Arnold N. Johnson

Arnold N. Johnson 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).

  • Scorch-safe acceleration of urethane vulcanization of unsaturated rubbers
    Patent number: 4324870
    Abstract: Improvements in scorch time of natural and synthetic rubber compositions in urethane crosslinking systems employing alkyl derivatives of dithiophosphoric acid as the scorch delay cure catalyst having the formula: ##STR1## wherein R.sub.1 and R.sub.2 are alkyl having at least 12 carbon atoms, or connected together and forman alkylene group having at least 2 carbon atoms, and R.sub.3 is hydrogen or phenethyl.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: April 13, 1982
    Assignee: Uniroyal, Inc.
    Inventors: Yong S. Rim, Walter Nudenberg, Arnold N. Johnson