Patents by Inventor Donald J. Isoldi

Donald J. Isoldi 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).

  • Controlled release composition
    Patent number: 4252785
    Abstract: A microporous controlled release composition, comprising at least about 20%, by weight, based on the total weight of the composition, of a solid, low molecular weight urea-formaldehyde resin having a molar ratio of urea to formaldehyde of from about 2:1 to about 3.5:1, and at least one active material contained in and releasable from said resin over a sustained period of time when said resin is in an aqueous medium.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: February 24, 1981
    Assignee: Hexcel Corporation
    Inventor: Donald J. Isoldi