Patents by Inventor Chen W. Chin

Chen W. Chin 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: 5098472
    Abstract: There is disclosed a preservative composition which is ultra stable in the presence of wood extractives comprising (a) an emulsion of a wood preserative grade creosote; (b) 5-95% water; (c) one or more pre-dispersed micronized pigments; (d) a rheology structuring agent present in an amount of 2.5 weight percent or less; (e) 0.25 to 10 weight percent of a soap which is an alkali metal salt of a wood derived resin acid; (f) 0.1 to 5 weight percent of a surfactant; (g) 0.25 to 2 weight percent of a natural or synthetic pigment modifying resins or anti-settle additive; and (h) 0.25 to 5 weight percent of a lignin sulfonate. The emulsion is produced under conditions of ultra-high sheer. A process for the manufacture of the preservative composition is also disclosed.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: March 24, 1992
    Assignees: Commonwealth Scientific & Industrial Research Organization, Koppers Australia Pty. Limited
    Inventors: John B. Watkins, Harry Greaves, Chen W. Chin