Patents by Inventor Mehmet Burduroglu

Mehmet Burduroglu 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).

  • Mold material made with additives
    Patent number: 5849209
    Abstract: The present invention is directed to a composition of polystyrene or polypropylene with at least 0.5% (w/w)of an additive or wetting agent, the article of manufacture comprised thereof, such as a mold for making contact lenses and the mold assembly containing said mold, and the use of such mold so to minimize defects, such as holes, puddles, chips and tears in the lens.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: December 15, 1998
    Assignee: Johnson & Johnson Vision Products, Inc.
    Inventors: Ture Kindt-Larsen, Jeffrey Longo, Keith O'Brien, James Jen, Michael Widman, Mehmet Burduroglu, Robert LaBelle
  • Method for reducing lens hole defects in production of contact lens blanks
    Patent number: 5849222
    Abstract: Improved homogeneity and uniformity of surface energy characteristics in a mold surface for hydrophilic contact lens production is achieved with the temporal application of a surface active agent such as Tween 80, to facilitate wetting of the optical surface of the mold, especially the convex mold, with the reactive monomer mix.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: December 15, 1998
    Assignee: Johnson & Johnson Vision Products, Inc.
    Inventors: James Jen, Michael Widman, Mehmet Burduroglu
  • Method for transiently wetting lens molds in production of contact lens blanks to reduce lens hole defects
    Patent number: 5674557
    Abstract: Hydrophilic contact lens molds are transiently modified to provide a water dynamic contact angle equal to or less than 100.degree. by treatment with a wetting agent which may be water or a surfactant composition which provides a mold surface having a water wetting force of at least 70 mg to afford a reduction in lens hole defects in hydrophilic contact lens manufacture.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: October 7, 1997
    Assignee: Johnson & Johnson Vision Products, Inc.
    Inventors: Michael Widman, James Jen, John Enns, Mehmet Burduroglu