Patents by Inventor John L. Lach

John L. Lach 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 ophthalmic gel formulation
    Patent number: 4738851
    Abstract: An ophthalmic gel for topical application to the conjunctival sac of the eye. The gel comprises an ophthalmic drug carried in a gel which provides good ocular retention while avoiding burst release of medicament and yet at the same time providing controlled release of the medicament. The gel contains in combination sodium carboxymethyl-cellulose and colloidal magnesium aluminum silicate. A combination of these ingredients in the gel provides the desired effects.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: April 19, 1988
    Assignee: University of Iowa Research Foundation, Inc.
    Inventors: Ronald D. Schoenwald, John L. Lach