Patents by Inventor Alfred Brechlin

Alfred Brechlin 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 using a flexible laminatable photosensitive layer in the production of a printed circuit
    Patent number: 4548885
    Abstract: Disclosed is a flexible photosensitive layer containing a polymeric binder, which is capable of being laminated and is applied to a preferably flexible support. The photosensitive layer comprises a photoconductor layer composed of a substantially organic photoconductor, the binder, a sensitizer and/or activator, in which the binder comprises at least one copolymer having repeating units of the general formula ##STR1## Wherein R.sub.1 denotes ##STR2## and R.sub.2 denotes H or --CH.sub.3.
    Type: Grant
    Filed: October 24, 1984
    Date of Patent: October 22, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Alfred Brechlin
  • Flexible laminatable photosensitive layer
    Patent number: 4492747
    Abstract: Disclosed is a flexible photosensitive layer containing a polymeric binder, which is capable of being laminated and is applied to a preferably flexible support. The photosensitive layer comprises a photoconductor layer composed of a substantially organic photoconductor, the binder, a sensitizer and/or activator, in which the binder comprises at least one copolymer having repeating units of the general formula ##STR1## wherein R.sub.1 denotes ##STR2## and R.sub.2 denotes H or --CH.sub.3.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: January 8, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Alfred Brechlin
  • Electrophotographic liquid developer and process for the manufacture thereof
    Patent number: 4157974
    Abstract: This invention relates to a liquid developer for developing electrostatic images which comprises an electrically insulating carrier liquid having dispersed therein pigmented polymer particles composed of pigment particles encapsulated by polymeric material and having a particle size in the range of about 0.1 to 12 .mu.m. The invention also includes a process for the preparation of the liquid developer.
    Type: Grant
    Filed: February 15, 1978
    Date of Patent: June 12, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Alfred Brechlin, Heinz Herrmann
  • Electrophotographic developer liquid
    Patent number: 3976583
    Abstract: This invention relates to an electrophotographic developer liquid comprising a dispersion of a colored, viscous solution of polymers containing about 0.01 to 10 per cent by weight of water, calculated on the weight of polymers present, in an electrically insulating carrier liquid having a kauri-butanol value of less than about 30 and in which at least one of the polymers is sparingly soluble. The invention also relates to a process for the preparation of the novel electrophotographic developer liquid.
    Type: Grant
    Filed: December 19, 1973
    Date of Patent: August 24, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Heinz Herrmann, Alfred Brechlin