Patents by Inventor Paul C. Blackstone

Paul C. Blackstone 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).

  • Iminodipropionate containing detergent compositions
    Patent number: 4416792
    Abstract: This invention relates to a detergent composition and a method for substantially eliminating separation of nonionic from a detergent slurry. The composition consists essentially of: (a) about 10%-60% builder; (b) about 2%-25% nonionic surfactant; (c) 0% to about 30% other ingredients; (d) an effective amount to substantially prevent separation of the nonionic from the detergent composition of a surface active iminodipropionate of the general formula: ##STR1## wherein R is an alkyl, hydroxyalkyl or oxyalkyl group containing from about 10 to about 18 carbon atoms and M is an alkali metal cation; and (e) the remainder water.
    Type: Grant
    Filed: September 17, 1982
    Date of Patent: November 22, 1983
    Assignee: Lever Brothers Company
    Inventor: Paul C. Blackstone
  • Homogeneous detergent containing nonionic and surface active iminodipropionate
    Patent number: 4375422
    Abstract: This invention relates to a detergent composition and a method for substantially eliminating separation of nonionic from a detergent slurry. The composition consists essentially of: (a) about 10%-60% builder; (b) about 2%-25% nonionic surfactant; (c) 0% to about 30% other ingredients; (d) an effective amount to substantially prevent separation of the nonionic from the detergent composition of a surface active iminodipropionate of the general formula: ##STR1## wherein R is an alkyl, hydroxyalkyl or oxyalkyl group containing from about 10 to about 18 carbon atoms and M is an alkali metal cation; and (e) the remainder water.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: March 1, 1983
    Assignee: Lever Brothers Company
    Inventor: Paul C. Blackstone