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Synthetic resins or natural rubbers -- part of the class 520 series May archived by USPTO category 05/09

20090137694 - Method of surface cross-linking superabsorbent polymer particles using ultraviolet radiation: The present invention relates to a method of surface cross-linking superabsorbent polymer particles using UV irradiation. The method is carried out in a so-called drum reactor, which comprises a hollow drum and an irradiation source. The drum has a longitudinal axis and a cross-section. Radical former molecules are applied on... Agent: Occhiuti Rohlicek & Tsao, LLP

20090137695 - Active ray curable ink-jet ink: An active ray curable ink-jet ink comprising at least an organic pigment, a polymer dispersant, a photo-initiator and a cationic polymerizable compound, wherein the active ray curable ink-jet ink incorporates a quaternary ammonium salt and a content of the quaternary ammonium salt is not less than 5 ppm and not... Agent: Frishauf, Holtz, Goodman & Chick, PC

20090137696 - Method for stabilizing refractive index profiles using polymer mixtures: A method for making an optical element comprises polymerizing a first monomer to form a first polymer, the first polymer having a spatially varying degree of cure that provides a predetermined refractive index profile; and polymerizing a second monomer in the presence of the first polymer to form a second... Agent: Morrison & Foerster LLP

20090131547 - Process for preparation of alicyclic diepoxy compounds, curable epoxy resin compositions, epoxy resin compositions for the encapsulation of electronic parts, stabilizers for electrical insulating oils, and casting epoxy resin compositions for electrical i: is produced in high purity and high yield at low cost, by epoxidizing the corresponding alicyclic diolefin compound with an organic percarboxylic acid. The curable epoxy resin composition has high reactivity for various curing agents, low viscosity, and excellent workability. A cured product thereof shows useful physical properties for uses... Agent: Birch Stewart Kolasch & Birch

20090131548 - Pva hydrogel: The present invention provides methods of making covalently crosslinked vinyl polymer hydrogels having advantageous physical properties, and covalently crosslinked vinyl polymer hydrogel compositions made by such methods, as well as articles of manufacture comprising such covalently crosslinked vinyl polymer hydrogel compositions. The physical properties of the produced hydrogels can be... Agent: Lowrie, Lando & Anastasi, LLP

20090131549 - Process for preparing polyvinylpyrrolidones by spray polymerization: A process for preparing polyvinylpyrrolidones by free-radically initiated polymerization in the presence of an initiator found, which comprises performing the polymerization as a spray or droplet polymerization.... Agent: Connolly Bove Lodge & Hutz, LLP

20090131550 - Photocurable composition for sealant, liquid crystal sealant, and liquid crystal panel: B1 represents (i) a divalent alicyclic hydrocarbon group, (ii) a divalent aromatic hydrocarbon group, (iii) a divalent heterocyclic group, (iv) a divalent aliphatic hydrocarbon group of 1 to 6 carbon atoms, or (v) a divalent group in which two or more group selected from the group consisting of a divalent... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20090124720 - Photocurable ink composition for ink-jet printing: P

20090118388 - Energy ray-curable inkjet printing ink: P

20090118389 - Hardenable dental compositions with low polymerization shrinkage: The present invention features a hardenable dental composition that contains: (1) at least one cyclic allylic compound having at least one sulfur atom in the ring, and (2) at least one at least one ethylenically unsaturated compound, such as a substituted (meth)acryloyl compound. The compositions also typically comprise an initiator... Agent: 3m Innovative Properties Company