Patents by Inventor Shiao-Ping Siao Yen

Shiao-Ping Siao Yen 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).

  • Novel polyelectrolytes
    Patent number: 4102827
    Abstract: Cationic polyelectrolytes are formed by the polymerization in absence of oxygen of a monomer of the general formula: ##STR1## where x is 3 or more than 6 and Z is I, Br or Cl to form high charge density linear polymers. Segments of the linear polymer may be attached to or formed in the presence of polyfunctional reactive tertiary amines or halogen polymeric substrates or polyfunctional lower molecular reactive polyfunctional substrates to form branched or star polyelectrolytes by a quaternization polymerization reaction.
    Type: Grant
    Filed: January 21, 1976
    Date of Patent: July 25, 1978
    Assignee: California Institute of Technology
    Inventors: Alan Rembaum, Shiao-Ping Siao Yen
  • Conductive hydrogel containing 3-ionene
    Patent number: 4036808
    Abstract: Cationic polyelectrolytes formed by the polymerization in absence of oxygen of a monomer of the general formula: dispersed ##STR1## where x is 3 or more than 6 and Z is I, Br or Cl to form high charge density linear polymers are dispered in a water-soluble polymer such as polyvinyl alcohol to form a conductive hydrogel.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: July 19, 1977
    Assignee: California Institute of Technology
    Inventors: Alan Rembaum, Shiao-Ping Siao Yen
  • Small, porous polyacrylate beads
    Patent number: 3985632
    Abstract: Uniformly-shaped, porous, round beads are prepared by the co-polymerization of an acrylic monomer and a cross-linking agent in the presence of 0.05 to 5% by weight of an aqueous soluble polymer such as polyethylene oxide. Cross-linking proceeds at high temperature above about 50.degree.C or at a lower temperature with irradiation. Beads of even shape and even size distribution of less than 2 micron diameter are formed. The beads will find use as adsorbents in chromatography and as markers for studies of cell surface receptors.
    Type: Grant
    Filed: October 4, 1974
    Date of Patent: October 12, 1976
    Assignee: California Institute of Technology
    Inventors: Alan Rembaum, Shiao-Ping Siao Yen, William J. Dreyer
  • Crosslinked, porous, polyacrylate beads
    Patent number: 3957741
    Abstract: Uniformly-shaped, porous, round beads are prepared by the co-polymerization of an acrylic monomer and a cross-linking agent in the presence of 0.05 to 5% by weight of an aqueous soluble polymer such as polyethylene oxide. Cross-linking proceeds at high temperature above about 50.degree.C or at a lower temperature with irradiation. Beads of even shape and even size distribution of less than 2 micron diameter are formed. The beads will find use as adsorbents in chromatography and as markers for studies of cell surface receptors.
    Type: Grant
    Filed: January 17, 1974
    Date of Patent: May 18, 1976
    Assignee: California Institute of Technology
    Inventors: Alan Rembaum, Shiao-Ping Siao Yen, William J. Dreyer