Patents by Inventor Wun T. Tai

Wun T. Tai 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).

  • Paint spray booth organic detackification treatment
    Patent number: 5298186
    Abstract: A composition and method of treating paint spray booth water to detackify organic solvent based paint particles. The composition comprises a melamine polymer obtained from the reaction of melamine, aldehyde and an amine selected from the group consisting of dicyandiamide and glycine. These melamine polymers may be used in combination with a polyacrylamide, which combination exhibits surprising and unexpected effects when used to detackify organic solvent paint particles.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: March 29, 1994
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David B. Mitchell, Thomas P. Curran, Wun T. Tai, Gary G. Engstrom
  • Method of dispersing iron
    Patent number: 5183574
    Abstract: A method of comprising iron in an aqueous system comprising adding to the system a copolymer of styrene sulfonic acid and methacrylic acid or its water soluble salt in an amount effective to disperse the iron contained therein.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: February 2, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Chih M. Hwa, John A. Kelly, Wun T. Tai, Lai-Duien G. Fan, Robert P. Kreh, Brian Greaves
  • Tire tread adhesives
    Patent number: 4497927
    Abstract: A tire tread adhesive or cement having superior green tack, excellent cured adhesion, and rapid drying time is disclosed. The tread cement comprises a water-in-oil emulsion having an oil continuous phase in which is dissolved a vulcanizable rubber compound. The water-in-oil emulsion tread adhesive may contain from 20-80% water, thereby minimizing environmental contamination on drying.
    Type: Grant
    Filed: June 15, 1984
    Date of Patent: February 5, 1985
    Assignee: Nalco Chemical Company
    Inventors: Wun T. Tai, Kenneth G. Phillips
  • Polycationic latices of dimethylaminopropyl-acrylamide, and their use of as sludge dewatering agents and/or paper retention aids
    Patent number: 4391932
    Abstract: Water-in-oil emulsions of copolymers of acrylamide and dimethylaminopropylacrylamide are disclosed. These polymers find use as retention aids in the manufacture of paper and as dewatering agents for municipal and industrial aqueous waste materials. Methods of preparing these polymers are disclosed.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: July 5, 1983
    Assignee: Nalco Chemical Company
    Inventor: Wun T. Tai
  • Stabilization of cationically modified acrylamide polymers
    Patent number: 4073763
    Abstract: A process for preparing cationic acrylamide polymers through the reaction of a formaldehyde-secondary amine adduct with a water-in-oil emulsion of finely divided acrylamide polymer formed by treatment with an oxygen containing halogen free inorganic acid or its alkali metal salts. The resulting products are further characterized in that they can be inverted easily into aqueous solution. Compositions produced by the invention are also disclosed.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: February 14, 1978
    Assignee: Nalco Chemical Company
    Inventor: Wun T. Tai