Patents by Inventor William J. Drefko

William J. Drefko 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).

  • Proliferous copolymer of vinyl pyrrolidone and vinyl acetate
    Patent number: 6806334
    Abstract: What is described herein is an excipient for a pharmaceutical tablet which is a proliferous copolymer of vinyl pyrrolidone and vinyl acetate, to provide the tablet with rapid dissolution and disintegration properties, and, also reduced hygroscopicity.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: October 19, 2004
    Assignee: ISP Investments Inc.
    Inventors: Edward G. Malawer, James P. Cullen, Chi-San Wu, Laurence Senak, William J. Drefko, David K. Hood, Peter J. Brush
  • Proliferous copolymer of vinyl pyrrolidone and vinyl acetate
    Publication number: 20040054066
    Abstract: What is described herein is an excipient for a pharmaceutical tablet which is a proliferous copolymer of vinyl pyrrolidone and vinyl acetate, to provide the tablet with rapid dissolution and disintegration properties, and, also reduced hygroscopicity.
    Type: Application
    Filed: September 16, 2003
    Publication date: March 18, 2004
    Applicant: ISP INVESTMENTS INC.
    Inventors: Edward G. Malawer, James P. Cullen, Chi-San Wu, Laurence Senak, William J. Drefko, David K. Hood, Peter J. Brush
  • Pharmaceutical tablet coating composition
    Publication number: 20040001884
    Abstract: A pharmaceutical tablet coating composition which is a synergistic combination of hydroxypropylmethyl cellulose and polyvinylpyrrolidone-vinyl acetate copolymer, providing coatings having high gloss, substantially no color fading for pigmented tablets and superior tensile strength.
    Type: Application
    Filed: June 21, 2002
    Publication date: January 1, 2004
    Applicant: ISP INVESTMENTS INC.
    Inventors: .Antonio Moroni, William J. Drefko
  • Proliferous copolymer of vinyl pyrrolidone and vinyl acetate
    Patent number: 6620900
    Abstract: What is described herein is a pharmaceutical excipient which is a proliferous copolymer of vinyl pyrrolidone and vinyl acetate, having advantageous dissolution and disintegration properties.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: September 16, 2003
    Assignee: ISP Investments Inc.
    Inventors: Edward G. Malawer, James P. Cullen, Chi-San Wu, Laurence Senak, William J. Drefko
  • PROLIFEROUS COPOLYMER OF VINYL PYRROLIDONE AND VINYL ACETATE
    Publication number: 20030153705
    Abstract: What is described herein is a pharmaceutical excipient which is a proliferous copolymer of vinyl pyrrolidone and vinyl acetate, having advantageous dissolution and disintegration properties.
    Type: Application
    Filed: February 7, 2002
    Publication date: August 14, 2003
    Applicant: ISP INVESTMENTS INC.
    Inventors: Edward G. Malawer, James P. Cullen, Chi-San Wu, Laurence Senak, William J. Drefko