Patents by Inventor Inge Gros

Inge Gros 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 developing exposed diazo negative-working reproduction layers using aqueous developer having salt of aromatic carboxylic acid with adjacent group substituent
    Patent number: 4579811
    Abstract: Disclosed is a developer composition for exposed, light-sensitive, negative-working reproduction layers, which may contain an organic binder, comprising water and a salt of a substituted aromatic carboxylic acid, in particular, from about 5 to 60% by weight of at least one salt of an aromatic carboxylic acid having substituents which are immediately adjacent to the carboxyl group and represent an amino group, a hydroxyl group, and/or chlorine or bromine. Also disclosed is a process for developing the reproduction layers utilizing the disclosed developers, wherein the reproduction layer contains, in particular, a polymeric organic binder with an acetal, anhydride, amide and/or a carboxyl group.
    Type: Grant
    Filed: December 28, 1983
    Date of Patent: April 1, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Loni Schell, Werner Frass, Inge Gros