Patents Assigned to Robert Parker Research, Inc.
  • Patent number: 4022706
    Abstract: Thin stable, substantially uniform, liquid crystal containing films are provided by coating a liquid crystal containing ink onto an inert substrate, which may be transparent, or opaque, optionally pigmented, particularly black pigment. The liquid crystal ink comprises an oil in water latex, where the latex contains a film forming polymer, a minor amount of an organic solvent for the liquid crystals, particularly a moderately water soluble organic solvent, which may be an individual solvent or a combination of solvents, the liquid crystals, and normally a thickening agent. The liquid crystal ink may be coated onto a wide variety of substrates and may then be coated with a protective coating or a dark backing. The laminated products can be used as ornamental articles of manufacture, for photographic reproduction, for temperature determination, and the like.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: May 10, 1977
    Assignee: Robert Parker Research, Inc.
    Inventor: Frederick Davis