Patents Assigned to Pharmaceutical Delivery Systems
  • Bioerodible polymers, compositions and therapeutic method
    Patent number: 5824343
    Abstract: Bioerodible ortho ester polymers useful for preparing bioerodible pharmaceutical compositions such as implants, ointments, creams, gels and the like are provided. The pharmaceutical compositions of the invention are useful for the controlled release of therapeutic agents, and may be administered for a variety of purposes, such as for the treatment of deep wounds, including burns, and for the treatment of periodontal disease.
    Type: Grant
    Filed: April 11, 1994
    Date of Patent: October 20, 1998
    Assignee: Pharmaceutical Delivery Systems
    Inventors: Steve Y. W. Ng, Jorge Heller
  • Bioerodible polymers for solid controlled release pharmaceutical compositions
    Patent number: 5461140
    Abstract: Bioerodible ortho ester polymers useful for preparing solid form bioerodible pharmaceutical compositions such as pellets, capsules, suppositories and the like are provided. A novel synthetic method for preparing the polymers is provided as well as is a novel triol reactant. Synthesis involves a one-step reaction between a monomeric ortho ester and a triol. The pharmaceutical compositions of the invention are useful for the controlled release of therapeutic agents, and may be administered for a variety of purposes.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: October 24, 1995
    Assignee: Pharmaceutical Delivery Systems
    Inventors: Jorge Heller, Steve Y. W. Ng
  • Bioerodible polymers useful for the controlled release of therapeutic agents
    Patent number: 5336505
    Abstract: Bioerodible ortho ester polymers useful for preparing bioerodible pharmaceutical compositions such as implants, ointments, creams, gels and the like are provided. The pharmaceutical compositions of the invention are useful for the controlled release of therapeutic agents, and may be administered for a variety of purposes, such as for the treatment of deep wounds, including burns, and for the treatment of periodontal disease.
    Type: Grant
    Filed: July 8, 1991
    Date of Patent: August 9, 1994
    Assignee: Pharmaceutical Delivery Systems
    Inventors: Steve Y. W. Ng, Jorge Heller