Patents by Inventor Stephen N. Quessy

Stephen N. Quessy 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).

  • Use of soluble fluorosurfactants for the preparation of metered-dose aerosol formulations
    Patent number: 5118494
    Abstract: Pharmaceutical suspension aerosol formulations using one or more perfluorinated carboxylic acids or esters thereof as surface-active dispersing agents and 1,1,1,2-tetra-fluorethane or 1,1,1,2,3,3,3-heptafluoropropane as the propellant are described.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: June 2, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert K. Schultz, Stephen N. Quessy