Patents by Inventor Thamala C Weerasinghe

Thamala C Weerasinghe 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).

  • Aqueous polymer dispersion
    Patent number: 6777489
    Abstract: This invention relates to a process for preparing an aqueous dispersion of water insoluble polymer particles comprising: a) preparing by polymerisation an aqueous dispersion of water insoluble particles of a heteropolymer including monomeric units of a reactive amphiphile having a cloud point and monomeric units of a hydrophilic monomer, said polymerisation being conducted in the presence of a stabilising agent and the reactive amphiphile and at a temperature above the cloud point of said amphiphile, and b) cooling said aqueous dispersion to a temperature below the cloud point of the reactive amphiphile such that the viscosity of the aqueous dispersion increases. The invention also relates to aqueous dispersions of water insoluble heteropolymer particles which incorporate units of reactive amphiphile.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: August 17, 2004
    Assignee: Orica Australia PTY Ltd.
    Inventors: Michelle Jocelyn Carey, Matthew William Carr, Patrick William Houlihan, Bruce Leary, Christopher Henry Such, Thamala C Weerasinghe