Patents by Inventor Virginia M. Osterman

Virginia M. Osterman 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).

  • Biodegradable compositions for controlled release of chemical agents
    Patent number: 5110868
    Abstract: Solid compositions comprising water degradable oligomers of hydroxyacetic acid and lactic acid having molecular weights of 800-4000 and containing 40-60 mole percent hydroxyacetic acid. The compositions are useful as controlled release agents for chemicals, especially as a toilet bowl cleaning component. Optional ingredients include dyes, fragrances, filler materials, surfactants, algicides, pest control agents, quaternary ammonium salts, and mixtures thereof.
    Type: Grant
    Filed: January 14, 1991
    Date of Patent: May 5, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Harold E. Bellis, Virginia M. Osterman