Patents by Inventor Pramod Kandanarachchi

Pramod Kandanarachchi 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).

  • Publication number: 20080242810
    Abstract: A method of controlling the molecular weight of poly(cyclic) olefin (norbornene-type) polymers and activating the polymerization thereof with a single material is provided. Such method include adding a chain transfer/activating agent to a mixture of monomer(s), catalyst, solvent and an optional cocatalyst and polymerizing the mixture to form a polymer. It is shown that the amount of chain transfer/activating agent in the mixture can serve to control the molecular weight of the resulting polymer, its percent conversion or both, and in some embodiments the optical density of the resulting polymer.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 2, 2008
    Applicant: Promerus LLC
    Inventors: Larry F. Rhodes, Steven Smith, Pramod Kandanarachchi, Chun Chang, Patrick Bradley
  • Publication number: 20060234164
    Abstract: Embodiments of the present invention relate generally to non-self imageable and imageable norbornene-type polymers useful for immersion lithographic processes, methods of making such polymers, compositions employing such polymers and the immersion lithographic processes that make use of such compositions. More specifically the embodiments of the present invention are related to norbornene-type polymers useful for forming imaging layer and top-coat layers for overlying such imaging layers in immersion lithographic process and the process thereof.
    Type: Application
    Filed: February 22, 2006
    Publication date: October 19, 2006
    Applicants: Promerus LLC, Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Larry Rhodes, Chun Chang, Pramod Kandanarachchi, Lawrence Seger, Keita Ishiduka, Kotaro Endo, Tomoyuki Ando
  • Publication number: 20060235174
    Abstract: Embodiments of the present invention relate generally to non-self imageable and imageable norbornene-type polymers useful for immersion lithographic processes, methods of making such polymers, compositions employing such polymers and the immersion lithographic processes that make use of such compositions. More specifically the embodiments of the present invention are related to norbornene-type polymers useful for forming imaging layer and top-coat layers for overlying such imaging layers in immersion lithographic process and the process thereof.
    Type: Application
    Filed: February 21, 2006
    Publication date: October 19, 2006
    Applicants: Promerus LLC, Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Larry Rhodes, Chun Chang, Pramod Kandanarachchi, Lawrence Seger, Keita Ishiduka, Kotaro Endo, Tomoyuki Ando
  • Patent number: 6106675
    Abstract: The method of the present invention is a microwave bond cleavage of a first hydrocarbon compound, the first hydrocarbon compound in a liquid phase and substantially non-aqueous, to a second compound having a shorter carbon chain than the first hydrocarbon compound. The method has the steps of exposing a combination of the first hydrocarbon compound with a supported catalyst having a carrier of a non-metallic amorphous solid with at least one catalytic metal dispersed therein to microwave energy thereby converting the first hydrocarbon compound into the second hydrocarbon compound, and recovering the second hydrocarbon compound. Advantages of the present invention include use of a low cost supported catalyst at ambient temperature and pressure.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: August 22, 2000
    Assignees: Battelle Memorial Institute, Governors of the University of Alberta
    Inventors: Dennis D. Tanner, Qizhu Ding, Pramod Kandanarachchi, James A. Franz