Patents by Inventor Richard D. Royce, Jr.

Richard D. Royce, Jr. 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).

  • Carboxymethyl hydrophobically modified hydroxyethylcellulose
    Patent number: 4826970
    Abstract: New anianic, water-soluble cellulose ether derivatives, in particular, carboxymethyl hydrophobically modified hydroxyethylcellulose (CMHMHEC), which are useful as thickeners in aqueous solutions, e.g., water-based protective coating compositions such as latex paints, as well as aqueous solutions, including water-based protective coating compositions containing these ternary cellulose ethers as thickeners and protective coloids, are disclosed. The cellulose ether derivatives are characterized in that they have a Brookfield LVF Viscosity of about 5 centipoise to about 60,000 centipoise in a 1 weight % solution.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: May 2, 1989
    Assignee: Hercules Incorporated
    Inventors: Albert R. Reid, Richard D. Royce, Jr.