Patents by Inventor Galen G. Lapka

Galen G. Lapka 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).

  • Patent number: 4622244
    Abstract: Microcapsules particularly those less than 300 microns in size are provided which are adapted for injection by conventional means to afford controlled release of the encapsulated drug material, such as a narcotic antagonist, an antibiotic or the like, over a prolonged period. The microcapsules are characterized by a solid core material of a solid, injectable drug material and a wall material engulfing the core material and composed of a polymer material such as a bioabsorbable polymer material. The microcapsules are made by providing a system containing a mixture of particles of a solid, injectable drug material and a solution of a bioabsorbable polymer material in a solvent in which the drug material is substantially insoluble. The system is treated to induce phase separation of the bioabsorbable polymer material from the solution by the addition to the system of a phase separation agent at a temperature at least as low as -30.degree. C.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: November 11, 1986
    Assignee: The Washington University
    Inventors: Galen G. Lapka, Norbert S. Mason, Curt Thies
  • Patent number: 4551148
    Abstract: Systems and their methods of preparation and use that release an active agent in a controlled manner for an extended period in a vaginal cavity environment. The systems are capable of delivering the active agent for periods greater than three hours at a predictable rate to a predetermined site, the vaginal cavity.
    Type: Grant
    Filed: October 11, 1984
    Date of Patent: November 5, 1985
    Assignee: KV Pharmaceutical Company
    Inventors: Thomas C. Riley, Jr., Charles P. Tharp, Galen G. Lapka