Patents by Inventor Ellen M. Ajello

Ellen M. Ajello 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).

  • Process for graft polymerization on surfaces of preformed substates to modify surface properties
    Patent number: 5805264
    Abstract: The invention relates to a process for modifying the surface characteristics of a preformed polymer substrate to impart altered properties thereto by graft polymerization on the substrate which includes: placing the polymer substrate in a plasma to form free radicals on the substrate; contacting the substrate having free radicals with oxygen to form hydroperoxy groups on the surface of the substrate; and graft polymerizing an ethylenically unsaturated monomer onto the surface of the polymer substrate.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: September 8, 1998
    Assignee: CIBA Vision Corporation
    Inventors: Robert A. Janssen, Ellen M. Ajello, Richard D. Auten, Glenn S. Nomura, Thomas E. Shank
  • Preparation of stable polyvinyl alcohol hydrogel contact lens
    Patent number: 5174929
    Abstract: A dimensionally stable hydrogel contact lens of polyvinyl alcohol having an equilibrium water content of between about 70 to about 80 weight percent, based upon the total swollen lens weight, said lens having been annealed in a mold essentially conforming to the contact lens dimensions under substantially ambient non-drying setting conditions in the presence of an aqueous-organic annealing promoter solvent, for a period of time substantially sufficient to reach annealing equilibrium.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: December 29, 1992
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert A. Janssen, Ping I. Lee, Ellen M. Ajello