Patents by Inventor Hsien Hsiang Hsu

Hsien Hsiang Hsu 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: 5786072
    Abstract: This invention relates to a method for preparing wood composition board, such as hard board, fabricated consolidating fibers or chips under heat and pressure to form an integral board material. More particularly, this invention relates to an improved method for applying a clear or pigmented prepress coating, also known as a prepress sealer, to the surface of a fibrous mat by converting the prepress sealer into foam prior to subjecting the mat to a temperature and pressure press treatment.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: July 28, 1998
    Inventors: Oscar Hsien-Hsiang Hsu, Anthony Eugene Schiavone
  • Patent number: 5741823
    Abstract: The present invention is directed to producing a smooth hard coating on a wood substrate. A layer of a foamed polymerized latex emulsion is applied on the surface of a wood substrate, such as an oriented strand board. The layer is dried, crushed and then cured to form the coating. If desired the cured coating may be provided with a post cure heat treatment to improve its hardness. The present invention is also directed to applying and drying the layer of the foamed polymerized latex emulsion on a mat of wood fibers or flakes and then crushing and curing the crushed layer and the mat into a hardboard having a smooth hard coating. The coating of the present invention is useful as a sealer coat on a wood substrate. By adding pigment to polymerized emulsion, the sealer coat can be used to provide a finish coat on the wood substrate.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: April 21, 1998
    Assignee: Rohm and Haas Company
    Inventor: Oscar Hsien-Hsiang Hsu
  • Patent number: 5718728
    Abstract: This invention relates to a method for strengthening a cellulosic substrate by treating the substrate with a formaldehyde-free curable aqueous composition and curing the composition. The cellulosic substrates include, for example, paper oil- and air-filter stock, rayon nonwoven wipes, cellulosic laminating stock, cotton woven fabrics, and wood flakes suitable to be consolidated into flakeboard.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: February 17, 1998
    Assignee: Rohm and Haas Company
    Inventors: Charles Thomas Arkens, Scott Lind Egolf, Robert David Gleim, Oscar Hsien-Hsiang Hsu, Kenneth John Wiesinger
  • Patent number: 5718943
    Abstract: The present invention is directed to producing an efflorescence resistant sealer coating on a cementitious substrate, such as, a roof tile. A foamed layer of an efflorescence resistant coating composition is preferably applied on the surface of a wet cementitious substrate. The wet cementitious substrate is then hydrated to produce the cementitious substrate having the efflorescence resistant coating thereon. If desired, the efflorescence resistant coating composition is provided with a pigment to produce a pigmented efflorescence resistant coating on the cementitious substrate or a clear efflorescence resistant coating of the present invention may be applied over pigmented cementitious substrate. The efflorescence resistant coating produced in accordance with the process of the present invention substantially reduces the formation of esthetically unpleasant efflorescent layer on cementitious substrate surfaces.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: February 17, 1998
    Assignee: Rohm and Haas Company
    Inventors: Oscar Hsien-Hsiang Hsu, Richard Barry Matt
  • Patent number: 5695823
    Abstract: This invention relates to a method for preparing wood composition board, such as hard board, fabricated consolidating fibers or chips under heat and pressure to form an integral board material. More particularly, this invention relates to an improved method for applying a clear or pigmented prepress coating, also known as a prepress sealer, to the surface of a fibrous mat by converting the prepress sealer into foam prior to subjecting the mat to a temperature and pressure press treatment.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: December 9, 1997
    Assignee: Rohm and Haas Company
    Inventors: Oscar Hsien-Hsiang Hsu, Anthony Eugene Schiavone
  • Patent number: 5616419
    Abstract: The present invention is directed to producing a smooth hard coating on a wood substrate. A layer of a foamed polymerized latex emulsion is applied on the surface of a wood substrate, such as an oriented strand board. The layer is dried, crushed and then cured to form the orating. If desired the cured coating may be provided with a post cure heat treatment to improve its hardness. The present invention is also directed to applying and drying the layer of the foamed polymerized latex emulsion on a mat of wood fibers or flakes and then crushing and curing the crushed layer and the mat into a hardboard having a smooth hard coating. The coating of the present invention is useful as a sealer coat on a wood substrate. By adding pigment to polymerized emulsion, the sealer coat can be used to provide a finish coat on the wood substrate.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: April 1, 1997
    Assignees: Rohm and Haas Company, Akzo Nobel Inc.
    Inventors: Oscar Hsien-Hsiang Hsu, Gerard M. Currier, Philip H. Moes
  • Patent number: 4017474
    Abstract: Polycarboxy-oxyalkylene polyester-ether polyol intermediates useful in the production of polyurethane products and methods of making the intermediates and polyurethane products are described. The polyol intermediates are made from lignin by reacting lignin with maleic anhydride, substituted maleic anhydride, or mixtures thereof to form carboxylated lignin maleic anhydride copolymers. These copolymers are then reacted with an oxyalkylating medium with or without prior hydrolysis to form the polyol intermediates. These polyester-ether polyol intermediates are then reacted with an isocyanate medium having an isocyanate with at least 2 NC0 groups per molecule to produce polyurethane products with or without simultaneous foaming.
    Type: Grant
    Filed: August 15, 1975
    Date of Patent: April 12, 1977
    Assignee: Research Corporation
    Inventors: Wolfgang Gerhard Glasser, Oscar Hsien-Hsiang Hsu