Patents by Inventor Peter W.Q. Xu

Peter W.Q. Xu 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).

  • Surface-modified Ca(CO3) and polymers containing same
    Publication number: 20040076574
    Abstract: A method for preparing a surface-modified calcium carbonate useful in the synthesis of polyesters such as polyethylene terephthalate, polybutylene terephthalate, etc. to improve the polymer's friction coefficient, which method comprises the step of forming a dispersion calcium carbonate particles and a monomeric bi-functional reagent having two functional linking substituents consisting of (1) a first substituent linking to the calcium carbonate particles and (2) a second substituent which can link to the polyester, thereby bonding the calcium carbonate to the polyester through the monomeric bi-functional linking reagent; and surface-modified calcium carbonate containing same.
    Type: Application
    Filed: September 16, 2003
    Publication date: April 22, 2004
    Inventors: Peter W.Q. Xu, Robert J. Nehring
  • Surface-modified Ca(CO3) and polymers containing same
    Publication number: 20030055207
    Abstract: A method for preparing a surface-modified calcium carbonate useful in the synthesis of polyesters such as polyethylene terephthalate, polybutylene terephthalate, etc. to improve the polymer's friction coefficient, which method comprises the step of forming a dispersion comprising calcium carbonate particles and a bi-functional reagent having two functional linking substituents consisting of a first substituent linking to the calcium carbonate particles and a second substituent which can link to the polyester, thereby bonding the calcium carbonate to the polyester through the bifunctional linking reagent; and surface-modified calcium carbonate and polyesters containing same.
    Type: Application
    Filed: August 12, 2002
    Publication date: March 20, 2003
    Applicant: NYACOL NANO TECHNOLOGIES, INC.
    Inventors: Peter W.Q. Xu, Robert J. Nehring, Raymond F. Woodman