Patents by Inventor Leni M. Walter-Gurzeler

Leni M. Walter-Gurzeler 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).

  • Method of making single wood concrete layer sound absorption panel
    Patent number: 5324469
    Abstract: A single wood concrete layer, sound absorption panel is formed as a single wood concrete layer, cast panel body of kaolin mineralized organic fiber chips encased in Portland cement with steel reinforcement. The panels have a noise reduction coefficient of at least about 0.85 for a panel thickness of about 10 cm and a panel density of 86.5 kg/m.sup.2.
    Type: Grant
    Filed: August 26, 1992
    Date of Patent: June 28, 1994
    Assignee: Insul Holz-Beton Systems, Inc.
    Inventors: Hansruedi Walter, Leni M Walter-Gurzeler
  • Double coated free aggregate usable in wood concrete technology and method of making the same
    Patent number: 5314744
    Abstract: A free aggregate usable in forming wood concrete products is formed by a process including the encasing of a free aggregate of individual chips with an inorganic mineralizing coating to a degree sufficient to seal in water-soluble organic matter held in pores of the chips, while maintaining the individual chips in a free aggregate form. The encased chips are then seasoned for 15 to 25 days and again coated with a second mineralizing coating.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: May 24, 1994
    Assignee: Insul Holz-Beton Systems Inc.
    Inventors: Hansruedi Walter, Leni M. Walter-Gurzeler
  • Coated free aggregate usable in wood concrete technology and method of making the same
    Patent number: 5019170
    Abstract: A free aggregate usable in forming wood concrete products is formed of a plurality of individual wood pinchips encased in kaolin to a degree sufficient to seal in water soluble "cement poisons" held in the pores of the chips, while maintaining the individual chips in a free aggregate form. The product is formed by a process which includes the step of encasing the individual particles with a mineralizing coating of the kaolin to a degree sufficient to seal in the water soluble cement poisons. As a preliminary step, the pores of the chips are sealed with an aluminum sulphate-water solution. Once cured, the chips are dimensionally stable, will not deteriorate and are not easily influenced by environmental conditions. Moreover, since the cement poisons are sealed within the chips, they cannot leach out to suppress hardening of a portland cement mix into which the chips may be introduced to form an aggregate in the formation of wood concrete products.
    Type: Grant
    Filed: September 13, 1989
    Date of Patent: May 28, 1991
    Assignee: Insul Holz-Beton Systems Incorp.
    Inventors: Hansruedi Walter, Leni M. Walter-Gurzeler