Patents by Inventor Daniel J. Dawson

Daniel J. Dawson 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: 4178422
    Abstract: Ethylsulfonate-alkylamine copolymers are disclosed. These copolymers find special application as intermediates in the preparation of new water-soluble polymeric colorants which are also disclosed, especially water-soluble polymeric colorants for edibles.
    Type: Grant
    Filed: April 19, 1978
    Date of Patent: December 11, 1979
    Assignee: Dynapol
    Inventors: Kenneth M. Otteson, Daniel J. Dawson
  • Patent number: 4169203
    Abstract: Acetylation of residual primary and secondary alkyl amine groups present in the structure of polymeric colorants and the acetylated colorant products are disclosed. The acetylation is a post production step. The acetylation improves the colorants' water solubility.
    Type: Grant
    Filed: November 18, 1976
    Date of Patent: September 25, 1979
    Assignee: Dynapol
    Inventors: Robert E. Wingard, Daniel J. Dawson
  • Patent number: 4018826
    Abstract: Poly(vinylamine) salts of mineral acids are produced by reacting acetaldehyde and acetamide at a mole ratio of 1:2-4 with acid catalyst, cracking the ethylidene-bis-acetamide which results into vinylacetamide, polymerizing the vinylacetamide with a free radical polymerization catalyst, and hydrolyzing the poly(vinylacetamide) to the desired amine salts by contacting the polyvinylacetamide with an aqueous solution of the corresponding mineral acid. This product may be converted to the free amine, which in turn may function as a precursor in the manufacture of certain polymeric dyes and colorants.
    Type: Grant
    Filed: November 4, 1974
    Date of Patent: April 19, 1977
    Assignee: Dynapol Corporation
    Inventors: Richard D. Gless, Jr., Daniel J. Dawson, Robert E. Wingard
  • Patent number: 4013801
    Abstract: Edible materials including foods, beverages and oral pharmaceuticals are sweetened by the addition of a sweetening amount in the range of from about 0.002% to 1% by weight (basis edible material) of flavanone represented by the structural formula ##STR1## wherein R is a lower alkyl of from one to three carbon atoms inclusive, n is an integer of from one to three inclusive and M is hydrogen or a physiologically acceptable metal cation.
    Type: Grant
    Filed: February 13, 1976
    Date of Patent: March 22, 1977
    Assignee: Dynapol Corporation
    Inventors: Daniel J. Dawson, Kenneth M. Otteson, C. Thomas Seitz
  • Patent number: 4000118
    Abstract: Nontoxic coloring compositions which comprise optically chromophoric groups attached via sulfonamido linkages to nondegradable chemical molecules having molecular dimensions which substantially prevent their absorption from the gastrointestinal tract are disclosed. The colorings find primary applications as food colors.
    Type: Grant
    Filed: February 11, 1975
    Date of Patent: December 28, 1976
    Inventors: Daniel J. Dawson, Josef Rudinger