Patents by Inventor Barry William Hay

Barry William Hay 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).

  • Solid solutions of monoazo pigments
    Patent number: 6482257
    Abstract: Solid solutions of monoazo pigments comprising a host lattice and at least one guest material wherein the host lattice is a material having the general formula I or II, wherein compound of formula I is defined as The guest material(s) have the same general formulae as their respective hosts with the proviso that they differ in molecular structure in at least one position from the respective hosts.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: November 19, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Greig Chisholm, Barry William Hay
  • Sorbitan ester treated pigments for plastics applications
    Patent number: 6440206
    Abstract: The present invention is directed to a composition comprising a sorbitan ester of the formula I and a monoazo pigment. The present invention further encompasses a process for its preparation and its use as well as the use of the sorbitan ester I as additive to improve color strength and dispersion properties.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: August 27, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Greig Chisholm, Barry William Hay