Patents by Inventor John Ugelstad, deceased

John Ugelstad, deceased 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).

  • Process for the preparation of monodisperse polymer particles
    Patent number: 7217762
    Abstract: A process for the preparation of monodisperse polymer particles which are formed by contacting monomers with aqueous dispersions comprising monodisperse swellable seed polymers/oligomers, and initiating polymerization in the presence of a steric stabilizer. The resulting swollen seed particles are characterized by the particle mode diameter.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: May 15, 2007
    Assignee: Invitrogen Corporation
    Inventors: Arne Jørgedal, Elin Marie Aksnes, Geir Fonnum, Astrid Evenrød Molteberg, Rolf Nordal, Henning Pettersen, Tollef Taarneby, Solveig Marle Staale, Ellen Weng, Finn Knut Hansen, Silje Steinbakk Nordbø, Oddvar Arnfinn Aune, Arvid Trygve Berge, John Olav Bjørgum, Turid Ellingsen, deceased, Arvid Tryge Berge, legal representative, John Ugelstad, deceased, Viola Ugelstad, legal representative
  • Process for preparing an aqueous emulsion with narrow droplet size distribution, the use of such an emulsion for preparing a polymer dispersion, and the recovery of polymer particles from such a dispersion
    Patent number: 6160061
    Abstract: A process for preparing an aqueous emulsion with a narrow droplet size distribution of an oily material comprising one or more highly water insoluble substances, wherein the oily material is homogenized in a hydrophilic phase in which the oily material is more soluble than in water, but still so insoluble that an emulsion is formed by the homogenization, and the emulsion is subsequently diluted with a high proportion of water to form a stable emulsion of the oily material having the desired narrow size distribution. The stable emulsion may be mixed with an excess of a partly water soluble material which becomes absorbed by the droplets of the oily material. Said partly water soluble material may comprise a polymerizable monomer, and polymerization is subsequently effected to prepare a dispersion of polymer particles, and if desired, the polymer particles are recovered from said dispersion.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: December 12, 2000
    Assignee: Nyfotek A/S
    Inventors: Arvid Berge, Kari-Anne Leth-Olsen, John Ugelstad deceased, Anne Dalager Dyrli, Steinar Pedersen