Patents by Inventor Ramon M. Pestana

Ramon M. Pestana 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).

  • Diosmin octakis (hydrogen sulfate) aluminum complex
    Patent number: 4894449
    Abstract: The invention refers to the preparation of diosmin octakis (hydrogen sulfate) aluminum complex, a new derivative of diosmin, by reaction of diosmin with a sulfating agent, such as sulfur trioxide-pyridine complex, sulfur trioxide-trimethylamine complex and sulfur trioxide-triethylamine complex, at a temperature between 40.degree. and 110.degree. C., in an appropriate medium, with preference pyridine, dimethylformamide and dimethylacetamide, and final addition of aluminum hydroxychloride.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: January 16, 1990
    Inventors: Aurelio O. Venero, Ramon M. Pestana
  • Compound 3-(1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxopurine-7-acetyl-8-(2-phenyle thyl)-1-oxa-3,8-diazaspiro-(4,5)decan-2-one and a process of preparation thereof
    Patent number: 4584372
    Abstract: The new compound 3-(1,2,3,6-tetrahydro-1,3-dimethyl-2,6-Dioxopurine-7-acetyl-8-(2-phenyleth yl)-1-oxa-3,8-diazaspiro-(4,5)decan-2-one and the process of preparation are described.
    Type: Grant
    Filed: November 16, 1983
    Date of Patent: April 22, 1986
    Inventors: Aurelio O. Venero, Ramon M. Pestana