Patents by Inventor Antonio C. Cardona

Antonio C. Cardona 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).

  • Multilayer matrix systems for the controlled release of active principles
    Patent number: 5549913
    Abstract: This invention concerns systems for the release of active principles which are capable of releasing active principle(s) into an aqueous medium at a controlled rate.More precisely, the invention concerns a monolithic system for the controlled release of active principles, consisting of:a) at least one swelling layer containing one or more active principles, in a matrix of swellable, hydrophilic polymers;b) at least one erodible and/or soluble layer comprising excipients and/or water soluble polymers, possibly containing one or more active principles, either the same or different from those present in the layer a), the said erodible and/or soluble layer being in contact with the swelling layer(s) a).
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: August 27, 1996
    Assignee: Inverni Della Beffa S.p.A.
    Inventors: Paolo Colombo, Antonio C. Cardona, Giorgio Pifferi