Patents by Inventor Hans U. Schlapfer

Hans U. Schlapfer 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: 5632936
    Abstract: A lens mold cavity is formed and then evacuated via a vacuum channel contained within a mold member. A fluid valve is opened to expose the lens mold cavity to liquid lens material, whereby a vacuum of the lens mold cavity draws the liquid lens material to fill the lens mold cavity. The fluid valve is then closed and the liquid lens material within the lens mold cavity is cured to obtain an opthalmic lens such as a contact lens.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: May 27, 1997
    Assignee: Ciba-Geigy AG
    Inventors: Kai C. Su, Jack C. White, Hans U. Schlapfer
  • Patent number: 4823162
    Abstract: A system for matching the envelope, film, and prints that make up a photographic processing order includes a method of identifying the film with a particular customer. The method includes the steps of reading a preprinted bar code from the customer envelope, printing that bar code on a segment of a continuous stock of splice tape, and then using that segment of splice tape to join the identified film to other films to form a continuous reel. The bar code from the film can be read after processing and matched to the envelope bearing the same bar code. An additional step includes encoding at least a portion of the identifying code on the prints made from the film in order to provide a three-way match. A splice tape printer to carry out the method includes a print head that is capable of simultaneously printing a bar code number and a human-readable number on the tape segment.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: April 18, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: John O. Renn, Hans U. Schlapfer, Kenneth G. Hammerquist, Charalambos Caraconstantis