Patents by Inventor William G. Louden

William G. Louden 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).

  • Flat paper and method of manufacturing involving controlled drying conditions
    Patent number: 4500607
    Abstract: A paper which resists significant distortion in planarity in response to moisture comprises a web which carries a predetermined amount of a polymer-filler blend and which has been dried after application of said blend to a finished moisture level below about 4%, by weight.
    Type: Grant
    Filed: July 28, 1982
    Date of Patent: February 19, 1985
    Assignee: William Gordon Louden
    Inventors: William G. Louden, William S. Louden
  • Erasable dense paper and improved method of manufacturing
    Patent number: 4393103
    Abstract: A paper which affords complete erasability of typewriter images is disclosed. The paper comprises a web of cellulosic fibers and a blend of a rigid polymeric material and a compatible filler together with a small but effective amount of tin carried by the web. A process for manufacturing the paper is also disclosed.
    Type: Grant
    Filed: August 28, 1981
    Date of Patent: July 12, 1983
    Inventor: William G. Louden
  • Dense paper
    Patent number: 4058648
    Abstract: A dense paper comprising a web of cellulosic fibers and an impregnant dispersed throughout the web, the impregnant consisting essentially of a blend of a rigid polymeric material and an inorganic filler, in stated proportions, with the impregnant constituting a minor portion of the finished weight of the paper. A process for producing the paper is disclosed.
    Type: Grant
    Filed: August 3, 1976
    Date of Patent: November 15, 1977
    Inventor: William G. Louden
  • Dense paper and method of manufacturing
    Patent number: 3989416
    Abstract: A dense paper comprising a web of cellulosic fibers and an impregnant dispersed throughout the web, the impregnant consisting essentially of a blend of a rigid polymeric material and an inorganic filler, in stated proportions, with the impregnant constituting a minor portion of the finished weight of the paper. A process for producing the paper is disclosed.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: November 2, 1976
    Inventor: William G. Louden