Patents by Inventor Rudolf Schuhmacher

Rudolf Schuhmacher 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).

  • Positive-working, radiation-sensitive mixture based on acid-cleavable and photochemically acid-forming compounds, and the production of relief patterns and relief images
    Patent number: 5084371
    Abstract: A positive-working, radiation-sensitive mixture and a process for the production of relief images.The radiation-sensitive mixture contains(a) a water-insoluble polymeric binder which is soluble or at least dispersible in aqueous alkaline solutions and(b) an organic compound whose solubility in an aqueous alkaline developer is increased by the action of an acid and which contains one or more acid-cleavable groups and in addition a further group which produces a strong acid on exposure to radiation, the polymeric binder (a) consisting a mixture of a phenolic polymer and a resin of the novolak type.The novel mixture is particularly suitable for the production of photoresists.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: January 28, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Reinhold Schwalm, Horst Binder, Rudolf Schuhmacher
  • Heat-curable molding compositions
    Patent number: 4835232
    Abstract: Bismaleimide resin systems containing one or more bismaleimides and an alkenyl and/or alkynyl substituted phenylated dicyclopentadiene comonomer have high glass transition temperatures and impact resistance.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: May 30, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Gunnar Schornick, Philipp Eisenbarth, Rudolf Schuhmacher, Jack D. Boyd