Patents by Inventor Gerard Drouin

Gerard Drouin 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).

  • Waterstop having improved water and moisture sealing features
    Patent number: 6948716
    Abstract: An improved waterstop having the important added feature of a hydro expansive compound which expands when subjected to water. By expanding, the hydro expansive compound effectively blocks the passage of water that leaks into the gaps created during the shrinkage of the concrete surrounding the improved waterstop. All that is required are narrow strips of judiciously positioned hydro expansive compound at opposite ends of the improved waterstop.
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: September 27, 2005
    Inventor: Gérard Drouin
  • Waterstop having improved water and moisture sealing features
    Publication number: 20040173977
    Abstract: An improved waterstop having the important added feature of a hydro expansive compound which expands when subjected to water. By expanding, the hydro expansive compound effectively blocks the passage of water that leaks into the gaps created during the shrinkage of the concrete surrounding the improved waterstop. All that is required are narrow strips of judiciously positioned hydro expansive compound at opposite ends of the improved waterstop.
    Type: Application
    Filed: March 3, 2003
    Publication date: September 9, 2004
    Inventor: Gerard Drouin