Patents by Inventor Erwin Schlusener

Erwin Schlusener 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).

  • Compositions exhibiting controlled release properties
    Patent number: 4155897
    Abstract: Compositions exhibiting controlled release of an active substance are disclosed. The compositions comprise an unsaturated polyester resin, an active substance, and hollow microspheres of an organic material, an inorganic material, or a mixture thereof.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: May 22, 1979
    Assignee: Akzona Incorporated
    Inventor: Erwin Schlusener