Patents by Inventor Marilyn A. Apfel

Marilyn A. Apfel 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).

  • Water insoluble drugs coated by coacervated fish gelatin
    Patent number: 5035896
    Abstract: According to this invention, the combination of a solid particulate water insoluble drug with a solid fish gelatin coating is produced by coacervation of the fish gelatin. The fish gelatin being soluble at ambient temperatures provides a basis for relatively low temperature coacervation impossible with other gelatins. Coacervation is brought about by the addition of conventional coacervation agents and the coacervating suspension containing gelatin and the agents is rendered insoluble by the addition of a suitable fixative such as glutaraldehyde.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: July 30, 1991
    Assignee: Warner-Lambert Company
    Inventors: Marilyn A. Apfel, Isaac Ghebre-Sellassie, Russell U. Nesbitt