Patents by Inventor Thomas M. Mangum

Thomas M. Mangum 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).

  • Stable, concentrated, liquid dispersions of anionic dyestuffs
    Patent number: 4567171
    Abstract: A composition and a process for the production of stable, water dispersions of anionic dyestuffs, for example acid or direct dyestuffs, useful for the dyeing of organic fibers including paper. Highly concentrated, liquid dispersions of at least 15-40% by weight of dry anionic dyestuff are achieved by the use of nonionic dispersing agents and mixing or grinding in a mill until most of the undissolved dyestuff particles are smaller than 10.mu..
    Type: Grant
    Filed: March 20, 1984
    Date of Patent: January 28, 1986
    Assignee: Ciba-Geigy Corporation
    Inventor: Thomas M. Mangum