Patents by Inventor Ignatius Y. Chan

Ignatius Y. Chan 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).

  • Powders of silica-oxide and mixed silica-oxide and method of preparing same
    Publication number: 20030092858
    Abstract: Silica powders and mixed silica-oxide powders and methods of preparing such powders for use as catalyst supports for polymerization processes.
    Type: Application
    Filed: February 27, 2002
    Publication date: May 15, 2003
    Inventors: Theresa A. Pecoraro, Ignatius Y. Chan, Darryl K. Whaley, Pamela R. Auburn
  • Powders of silica-oxide and mixed silica-oxide and method of preparing same
    Publication number: 20030060582
    Abstract: Silica powders and mixed silica-oxide powders and methods of preparing such powders for use as catalyst supports for polymerization processes.
    Type: Application
    Filed: February 27, 2002
    Publication date: March 27, 2003
    Inventors: Theresa A. Percoraro, Ignatius Y. Chan, Darryl K. Whaley, Pamela R. Auburn
  • Powders of silica-oxide and mixed silica-oxide and method of preparing same
    Patent number: 6372685
    Abstract: Silica powders and mixed silica-oxide powders and methods of preparing such powders for use as catalyst supports for polymerization processes.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: April 16, 2002
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Theresa A. Pecoraro, Ignatius Y. Chan, Darryl K. Whaley, Pamela R. Auburn
  • Silica-modified aluminophosphate compositions, catalysts, method of preparing same and polymerization processes
    Patent number: 6111037
    Abstract: An amorphous aluminophosphate composition is provided which exhibits a microstructure of sheets and spheres of silica-modified aluminophosphate. Also provided is a method for preparing the composition comprising mixing an aqueous solution containing aluminum ions, phosphate ions and silica ions, with a neutralizing solution, wherein the mixing is conducted with sufficient shear to produce on a microlevel, sheets of silica-modified aluminophosphate and spheres of silica-modified aluminophosphate. A polymerization catalyst and a polymerization process are also provided.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: August 29, 2000
    Assignee: Chevron Chemical Company LLC
    Inventors: Pamela R. Auburn, Theresa A. Pecoraro, Ignatius Y. Chan
  • Powders of silica-oxide and mixed silica-oxide and method of preparing same
    Patent number: 6107236
    Abstract: Silica powders and mixed silica-oxide powders and methods of preparing such powders for use as catalyst supports for polymerization processes.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: August 22, 2000
    Assignee: Chevron Chemical Company LLC
    Inventors: Theresa A. Pecoraro, Ignatius Y. Chan, Darryl K. Whaley, Pamela R. Auburn
  • Aluminophosphates and their method of preparation
    Patent number: 6022513
    Abstract: Disclosed is a new aluminophosphate composition which is (i) amorphous; (ii) has, on a microlevel, sheets of aluminophosphate as well as spheres. The new composition can be made, in one embodiment, by neutralizing a mixture of aluminum cations and phosphate anions with a base with vigorous mixing including shear forces sufficient to result in the formation of a mixture of sheets and spheres of aluminophosphate on a microlevel.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: February 8, 2000
    Inventors: Theresa A. Pecoraro, Ignatius Y. Chan