Patents by Inventor Henry W.-H. Yang

Henry W.-H. Yang 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).

  • Lamp socket
    Patent number: 5803766
    Abstract: A tubular lamp socket includes a body provided with two different selectable kinds of structures for fixing on a wall. One kind is using screws, and another is using engage arms. If a wall has an open hole, the engage arms can be used, and if otherwise, screws can be used. Thus it has convenience in fixing on a wall.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: September 8, 1998
    Inventor: Henry W. H. Yang
  • Block copolymers from ionic catalysts
    Patent number: 5391629
    Abstract: A process for the production of block copolymers of ethylene and an .alpha.-olefin such as propylene by using an ionic catalyst system including a metallocene component and a component having a cation capable of donating a proton and a compatible non-coordinating anion. Novel block copolymers are produced.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: February 21, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Howard W. Turner, Gregory G. Hlatky, Henry W.-H. Yang, Avinash C. Gadkari, Gary F. Licciardi
  • Solution process for preparation hydrophobically functionalized cationic polymers (C-2691)
    Patent number: 5362827
    Abstract: This invention provides a process for preparing novel hydrophobically associating polymers containing cationic functionality which are useful for clean-up of waste waters containing organic contaminants. These water soluble polymers contain both water soluble and water insoluble monomers. The water soluble monomers are acrylamide (AM) and a salt of an unsaturated amine base (C), and the water insoluble monomer is a higher alkyl(meth)acrylamide or alkyl(meth)acrylate (R). These polymers are referred to as CRAM. The process relies on the dissolution of the water insoluble monomer(s) into an aqueous solution of water soluble monomers by means of a water miscible mutual cosolvent.
    Type: Grant
    Filed: July 27, 1992
    Date of Patent: November 8, 1994
    Assignee: Exxon Research & Engineering Co.
    Inventors: Jan Bock, Paul L. Valint, Thomas J. Pacansky, Henry W. H. Yang
  • Internal resin-tackified acrylic polymers containing crosslinkable comonomers
    Patent number: 5242754
    Abstract: Acrylic copolymer compositions which contain a tackifying hydrocarbon resin and a polyfunctional crosslinking monomer and the use of such composition in pressure-sensitive adhesives are described. The tackifying hydrocarbon resin is dissolved, as is the polyfunctional monomer, in a solution of alkyl(meth)acrylate and (meth) acrylic acid monomers and is present during the polymerization of the monomers to form a tackified acrylic copolymer.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: September 7, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Henry W.-H. Yang