Patents by Inventor P. Dong-Guang Liu

P. Dong-Guang Liu 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).

  • Patent number: 4814960
    Abstract: Micro-irregularities on a surface that interacts with (transmits or reflects) illumination from a light source are effective to control glare perceived by a viewer in the light path projected from the source, while maintaining effective energy and directionality of the projected light. Preferably the micro-irregularities are created by liquid dispersion comprising organic polymeric particles and allowing the coating to dry.
    Type: Grant
    Filed: May 14, 1986
    Date of Patent: March 21, 1989
    Inventor: P. Dong-Guang Liu
  • Patent number: 4734295
    Abstract: A method and kit for glare control and improvement of image transmission through a reflective-transmissive surface comprising surface irregularities to control glare. A dispersion of particles is applied to the surface and allowed to dry. Then an inert fluid coating is applied to the surface to enhance clarity. A liquid dispersion comprising a flattening agent is applied to the surface and allowed to dry so that the particles and flattening agent form a transparent glare-reducing coating. An inert fluid coating is applied to sufficient thickness to remove some, but not all, of the surface irregularities created by the glare reducing coating. A method of formulating the liquid dispersion is also disclosed.
    Type: Grant
    Filed: April 14, 1986
    Date of Patent: March 29, 1988
    Inventor: P. Dong-Guang Liu