Patents by Inventor C. Paul Malone

C. Paul Malone 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).

  • Stain-inhibiting agent for dyes with affinity for protonatable nitrogen, compositions containing same and uses thereof
    Patent number: 5681604
    Abstract: The staining effect (particularly with respect to the staining of polyamides) of a colorant such as a dye used in foods and beverages is inhibited by a compound of the formula ##STR1## wherein: Z.sup.1, Z.sup.2, and Z.sup.3 are the same or different and are each a bridging radical or a direct bond,Ar.sup.1, Ar.sup.2, and Ar.sup.3 are the same or different and are aromatic or bicyclic radicals;Q is a fused, partially aromatic bicyclic radical,or Q is a carbohydrate residue having a non-repeating structure, in which case m is 1, or Q is a carbohydrate having repeating saccharide units, in which case Q along with its substituents is repeated m times, where m is the number of said repeating saccharide units, butwhen Q is not a carbohydrate residue, m is 1;R.sup.1, R.sup.2, and R.sup.3 are H or polyhydroxybenzoyl,R.sup.4, R.sup.5 and R.sup.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: October 28, 1997
    Inventors: Hualin Li, Mongia Gagan, C. Paul Malone, Robert W. Keown
  • Prevention of fabric staining
    Patent number: 5096726
    Abstract: Stain of fabrics containing terminal amine groups by foodstuffs and other liquid or moist products that contain a dye having sulfonic acid moieties can be prevented or minimized by also including in the product a sulfonated naphthol- or sulfonated phenol-formaldehyde condensation product in non-toxic quantities.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: March 17, 1992
    Assignee: University of Delaware
    Inventors: Robert W. Keown, C. Paul Malone, Lisa L. Oehrl