Patents by Inventor Thomas Loerzer

Thomas Loerzer 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).

  • Photochromic system and layers produced therewith
    Patent number: 4857438
    Abstract: A photochromic system contains an oxidizable leuco dye and a photochemically activated initiator which converts the leuco dye to the dye, the initiator being a phenanthroimidazole derivative.The photochromic system is useful for the production of photochromic layers for photoresists and printing plates.
    Type: Grant
    Filed: March 20, 1987
    Date of Patent: August 15, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Loerzer, Reinhold J. Leyrer
  • Electrophotographic recording elements with hydrolyzed silane layer
    Patent number: 4782000
    Abstract: An electrophotographic recording element consisting of an aluminum base, which is mechanically, chemically and/or electrochemically pretreated in a conventional manner, and a photoconductive layer which is applied to this base is produced by a process in which a thin layer which imparts hydrophilic properties and consists of a hydrolysis product or condensate of a silane is applied between the base and the photoconductive layer.These recording elements are particularly useful for electrophotographic offset printing.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: November 1, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Harald Lauke, Reinhold J. Leyrer, Bernhard Nick, Thomas Loerzer
  • Phenanthroimidazole compounds, their preparation, photopolymerizable coating and recording materials, and lithographic layers produced using these
    Patent number: 4770976
    Abstract: Phenanthroimidazole compounds, a process for their preparation, photopolymerizable coating and recording materials and lithographic layers produced using these.The novel phenanthroimidazole compounds are useful as photoinitiators for photopolymerizable coating and recording materials.
    Type: Grant
    Filed: March 20, 1987
    Date of Patent: September 13, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Loerzer, Reinhold J. Leyrer