Patents by Inventor Nicholas Robert Buenfeld

Nicholas Robert Buenfeld 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 the protection of reinforcement in reinforced concrete
    Patent number: 6685822
    Abstract: The invention provides a reinforced concrete having improved corrosion resistance in which the content of voids in the concrete at the surface of the steel reinforcement is below 0.8%, preferably below 0.5%, more preferably below 0.2% by area of steel and in which there is a layer of solid alkali, preferably at least one micron in thickness on the steel surface. The reinforced concrete preferably has a chloride threshold level of at least 0.5% preferably at least 0.8% by weight of the cement. The invention also provides a process for reducing corrosion of steel reinforcement in concrete which comprises forming a reinforced concrete in which the voids at the steel surface are below 0.5% by volume and in which there is a layer of solid alkali on the steel surface the layer being at least 1 micron in thickness and covering at least 20% of the steel surface.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: February 3, 2004
    Assignee: Imperial College of Science Technology and Medicine
    Inventors: Nicholas Robert Buenfeld, Gareth Kevin Glass, Bharti Reddy, Robert Franklyn Viles
  • Process for the protection of reinforcement in reinforced concrete
    Publication number: 20030075457
    Abstract: The invention provides a reinforced concrete having improved corrosion resistance in which the content of voids in the concrete at the surface of the steel reinforcement is below 0.8%, preferably below 0.5%, more preferably below 0.2% by area of steel and in which there is a layer of solid alkali, preferably at least one micron in thickness on the steel surface. The reinforced concrete preferably has a chloride threshold level of at least 0.5% preferably at least 0.8% by weight of the cement. The invention also provides a process for reducing corrosion of steel reinforcement in concrete which comprises forming a reinforced concrete in which the voids at the steel surface are below 0.5% by volume and in which there is a layer of solid alkali on the steel surface the layer being at least 1 micron in thickness and covering at least 20% of the steel surface.
    Type: Application
    Filed: October 2, 2002
    Publication date: April 24, 2003
    Inventors: Nicholas Robert Buenfeld, Gareth Kevin Glass, Bharti Reddy, Robert Franklyn Viles