Patents by Inventor Otto Atzrott

Otto Atzrott 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).

  • Non-smudging pressure-sensitive copying material
    Patent number: 3934069
    Abstract: A pressure-sensitive copying material consisting of a sheet-like base to which has been applied a coating comprising microcapsules containing dyes. The microcapsules are filled with a solution or suspension of a salt of a dye base and an organic carboxylic acid in an organic water-immiscible solvent. The copying material is distinguished by exceptional non-smudging characteristics and is particularly suitable for the production of business forms.
    Type: Grant
    Filed: June 28, 1974
    Date of Patent: January 20, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Otto Atzrott, Wolfgang Sliwka, Heinz Hartmann