Patents by Inventor Henri Dumas

Henri Dumas 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).

  • Biomaterial based on collagen and its application
    Patent number: 5654135
    Abstract: Biomaterial based on collagen comprises, intimately associated, a support forming a dermal substitute, said support comprising a layer based on type IV collagen and an epidermal epithelium having differentiated cells obtained by growing epidermal cells on said support.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: August 5, 1997
    Assignees: Imedex, societe anonyme, Pasteur Merieux Serums et Vaccins, societe anonyme
    Inventors: Estelle Tinois, Jerome Tiollier, Henri Dumas, Michel Tardy
  • Visceral surgery patch
    Patent number: 5201745
    Abstract: A patch for visceral surgery is made from a biomaterial consisting of two layers of collagen superimposed and closely combined, namely a porous adhesive layer of fibrous collagen and a film of collagen and/or gelatin.
    Type: Grant
    Filed: August 15, 1991
    Date of Patent: April 13, 1993
    Assignee: Imedex
    Inventors: Jean-Louis Tayot, Jacques Marescaux, Henri Dumas, Michel Tardy
  • Method for diffusion of aluminium
    Patent number: 4038111
    Abstract: The invention relates to a method for diffusing aluminium into a substrate by painting. According to this method, aluminium isopropylate is dissolved in ethoxyethanol at the maximum solubility. This solution is uniformly coated onto a substrate and a diffusion is carried out by placing this coated substrate into an open furnace. This invention is for manufacturing high voltage semiconductor devices.
    Type: Grant
    Filed: July 14, 1975
    Date of Patent: July 26, 1977
    Assignee: Silec-Semi-Conducteurs
    Inventor: Guy Henri Dumas