Patents by Inventor Erwin Schweigl

Erwin Schweigl 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).

  • Patent number: 4899914
    Abstract: Described is a method, and resulting product, for producing a sterile preservative-free areosol contact lens solution comprising; aseptically filling a pre-sterilized aerosol container with a contact lens solution preserved with sufficient hydrogen peroxide; aseptically introducing into the container means, such as a catalyst, for converting the hydrogen peroxide into inert or inactive substances one of which is a suitable propellant; and sealing and storing the container for a time sufficient to complete the inactivation of the hydrogen peroxide and creation of the suitable propellant.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: February 13, 1990
    Assignee: CIBA-Geigy Corporation
    Inventors: Erwin Schweigl, Thomas P. Hayes, Dusan Kljajic, Rolf Jellositz