Patents by Inventor John A. Hook

John A. Hook 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).

  • Exhaust dyeing process for mixed fibre substrate in single bath: disperse dye, copper complex dye, complexing agent and oxidizing agent
    Patent number: 5196031
    Abstract: A process for dyeing a mixed fibrous substrate comprising applying to the substrate,a) at least one disperse dye,b) at least one copper - containing direct or reactive dye, preferably in a sufficient amount to produce a dyeing greater than a 1/1 standard depth;c) a complexing agent having a stability constant (K-value) with the metal of the direct or reactive dye of from 6 to 17 inclusive;d) a lignin sulphonate dispersing agent; ande) an oxidizing agent capable of converting copper (I) to copper (II) at a temperature of 100.degree.-130.degree. C. at a pH of 5-7 in the process for dyeing the mixed substrate.
    Type: Grant
    Filed: August 27, 1991
    Date of Patent: March 23, 1993
    Assignee: Sandoz Ltd.
    Inventor: John A. Hook
  • Dyeing of mixed-fiber substrates with a disperse dye and a metal-complex direct or reactive dye
    Patent number: 4752299
    Abstract: A process for dyeing a mixed fibrous substrate comprising applying to the substrate at least one disperse dye and at least one metal containing direct and/or reactive dye in the presence of a complexing agent having a stability constant K value with the metal of the direct or reactive dye of from 6 to 17 inclusive.
    Type: Grant
    Filed: October 23, 1986
    Date of Patent: June 21, 1988
    Assignee: Sandoz Ltd.
    Inventors: Oskar Annen, John A. Hook
  • Method and composition for cleaning anodized aluminum
    Patent number: 4532065
    Abstract: Cleansing compositions useful in cleaning anodized aluminum contain a detergent builder, a detergent agent and a soluble salt of a transition metal. The presence of the transition metal ion protects the anodized coating from attack by the detergent builder.
    Type: Grant
    Filed: June 5, 1981
    Date of Patent: July 30, 1985
    Assignee: FMC Corporation
    Inventors: Leon E. Cohen, John A. Hook