Patents by Inventor Helga Grunzel

Helga Grunzel 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 applying antidrip edge to a glass sheet
    Patent number: 5837342
    Abstract: An antidrip edge composition of fine-powder glass formers, cellulosic polymer and water to which a mineral acid is added has a pot-life lengthener for the dispersion is subjected to vacuum and/or agitation and/or vibration to remove bubbles, upon application to a glass sheet, prevents escape of an alkali silicate solution forming a fire-resisting intervening layer between that glass sheet and another glass or plastic sheet applied thereto.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: November 17, 1998
    Assignee: Flachglas AG
    Inventors: Hans-Henning Nolte, Helga Grunzel, Bernhard Sattler
  • Fire resistant glass structure
    Patent number: 5766770
    Abstract: A fire resistant glass structure in which the intervening layer between the panes has a portion of its polyhydric organic compounds replaced by potassium water glass in a layer which consists primarily of sodium water glass. The replacement eliminates ultraviolet light sensitivity without reduction in the increase in the duration of fire resistance provided by the organic compound.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: June 16, 1998
    Assignee: Flachglas AG
    Inventors: Hans-Henning Nolte, Helga Grunzel, Bernd Harbecke