Patents Examined by John Knight, III
  • Patent number: 5547941
    Abstract: There are provided compounds of formula (I) ##STR1## wherein each group B is, independently, a naturally occurring or modified heterocyclic base linked through a nitrogen or a carbon atom of the ring to the sugar moiety;each group X is a, independently, hydrogen, fluorine, hydroxy, or a C.sub.1 -C.sub.6 alkoxy group;each group Y is, independently, hydrogen, sulphidryl or hydroxy; and the pharmaceutically acceptable salts thereof.A process for their preparation and pharmaceutical compositions comprising them are also described. The compounds of this invention can be useful as antivirals, particularly as anti-HIV (Human Immunodeficiency Virus) agents, namely as drugs to be used against AIDS (Acquired Immunodeficiency Syndrome) therapeutically and/or prophylatically.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: August 20, 1996
    Assignee: Farmitalia Carlo Erba S.R.L.
    Inventors: Carlo Battistini, Silvia Fustinoni, Maria G. Brasca, Domenico Ungheri
  • Patent number: 5403910
    Abstract: A low temperature process for polymerizing nylon monomers to freely flowing polymers is disclosed. The polymerization process is carried out at lower than conventional polymerization temperatures and produces a freely flowing polymer without thermal degradation.
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: April 4, 1995
    Assignee: E. I. Du Pont de Nemours & Company
    Inventors: Leonard E. R. Kosinski, Richard R. Soelch
  • Patent number: 5281659
    Abstract: Provided are polyester compositions having thermally stable colorants copolymerized therein, said colorants comprised of at least one electron-rich aromatic moiety attached to a negatively substituted 2,5-dioxypyrrolin-3-yl moiety and containing at least one, and preferably, two polyester reactive groups. Also provided are polyester color concentrates and blends of the colored polyester compositions with other thermoplastic polymers and shaped or formed articles comprised of same.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: January 25, 1994
    Assignee: Eastman Kodak Company
    Inventors: Max A. Weaver, Clarence A. Coates, William W. Parham, Samuel D. Hilbert, James J. Krutak, Wayne P. Pruett
  • Patent number: 5089584
    Abstract: Useful as catalysts for the reaction of a polyisocyanate or a partially blocked polyisocyanate with a hydroxy-containing compound are organotin compositions obtained by reacting a diorganotin oxide of the formula R.sub.2 SnO or a diorganotin dichloride of the formula R.sub.2 SnCl.sub.2 with a compound of the formula HS--CH.sub.2 CH(OH)CH.sub.2 XH where R is a C.sub.1 -C.sub.8 alkyl or an aryl group and X is --O-- or --S--.Also disclosed alre cationic electrodepositable (CED) compositions containing such catalysts.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: February 18, 1992
    Assignee: Air Products and Chemicals, Inc.
    Inventors: James D. Nichols, John B. Dickenson
  • Patent number: 5070149
    Abstract: A novel cationic electrodepositable resin which offers reduced bake off lose, reduced yellowing of topcoats and very smooth film is disclosed. The backbone resin contains the basic polyepoxy amine adduct but it is crosslinked with a diol modified methylene diphenyl diisocyanate (MDI) which is blocked with a mixture of various alcohols.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: December 3, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Tapan K. DeBroy, Ding Y. Chung
  • Patent number: 5043092
    Abstract: The present invention is directed to a process for the production of polyisocyanate mixtures containing isocyanurate groups and uretdione groups in a molar ratio of about 1:9 to 9:1 by oligomerizing a portion of the isocyanate groups of hexamethylene diisocyanate using trialkyl phosphines and/or peralkylated phosphorus acid triamides as the catalysts which accelerate the dimerization and trimerization of isocyanate groups, terminating the reaction at the desired degree of oligomerization by the addition of a catalyst poison and removing unreacted hexamethylene diisocyanate to a residual content of at most 0.5% by weight, characterized in that, before addition of the catalyst, the hexamethylene diisocyanate starting material is freed from carbon dioxide to a residual content of less than 20 ppm (weight).
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: August 27, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef Pedain, Klaus Konig, Winfried Dell
  • Patent number: 4962133
    Abstract: A precipitation polymerization process for the production of a macroporous cross-linked copolymer in which there is added to a reactor equipped with a stirrer, at least one monounsaturated monomer and at least one polyunsaturated monomer, dissolving an inorganic polymerization reaction initiator in a homogeneous minimum-boiling binary azeotrope including a solvent and water, and conducting the polymerization in the azeotrope.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: October 9, 1990
    Assignee: Dow Corning Corporation
    Inventors: Richard C. Chromecek, Milan F. Sojka, William L. Klein, Walter J. Carmody
  • Patent number: 4957997
    Abstract: A facile process for converting polyketones containing pendant functional groups to polyesters is provided. The process involves reacting the polyketone with an organic peroxyacid oxidizing agent in an inert liquid medium at a temperature from -20.degree. C. to 150.degree. C. to convert substantially all or only a portion of the keto functionality to ester moieties. The polyketones are obtained by copolymerizing carbon monoxide and a vinyl or vinylidene monomer having at least one functional group containing one or more oxygen, nitrogen, sulfur or halogen atoms.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: September 18, 1990
    Assignee: Quantum Chemical Corporation
    Inventors: Biau-Hung Chang, Jack Kwiatek
  • Patent number: 4954608
    Abstract: A copolymerized polyamic acid salt having a recurring unit represented by following formula (I) and (II) and the process for preparing thereof. ##STR1## wherein (A) or (A') represents a formula ##STR2## wherein, R.sup.1 represents a tetravalent group having at least 2 carbon atoms; R.sup.2 represents a divalent group having at least 2 carbon atoms; and R.sup.31, R.sub.32, R.sup.33, R.sup.41, R.sup.42, R.sup.43, R.sup.5, and R.sup.6 each represents a monovalent group having 1 to 30 carbon atoms selected from an aliphatic group, an alicyclic group, an aromatic group, a group in which an aliphatic group is combined with an alicyclic group or an aromatic group, each of these groups substituted by a halogen atom, a nitro group, an amino group, a cyano group, a methoxy group, or an acetoxy group, or a hydrogen atom; at least one of said R.sup.31, R.sup.32, R.sup.33, R.sup.41, R.sup.42, R.sup.43, R.sup.5 and R.sup.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: September 4, 1990
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki
    Inventors: Masakazu Uekita, Hiroshi Awaji
  • Patent number: 4450248
    Abstract: Piperidine-4-carboxylic acid derivatives of the formula ##STR1## wherein: R.sub.2 is hydrogen, alkyl having from one to four carbon atoms, or oxyl;R.sub.3 is --XR.sub.5 or --CN;R.sub.4 is alkylene having from two to twelve carbon atoms; cycloalkylene having from three to twelve carbon atoms; arylene having from six to twelve carbon atoms; or aralkylene having from seven to twelve carbon atoms;R.sub.5 is hydrogen, alkyl having from one to twenty carbon atoms, cycloalkyl having from five to six carbon atoms; or alkenyl having from three to twenty carbon atoms; or ##STR2## X is --O-- or --NH--; and n is 0 to 10;and the acid addition salts thereof.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: May 22, 1984
    Assignee: Phoenix Chemical Corporation
    Inventors: William E. Leistner, Charles G. Overberger
  • Patent number: 3998994
    Abstract: Modified copolymers which have viscosities which vary very markedly with changes in temperature are obtained by malaxating a statistical copolymer of ethylene and maleic anhydride containing between 0.5 and 20% by weight of units derived from maleic anhydride and having a melt index of between 0.1 and 500 dg/min, in the molten state with at least one chemical reagent containing at least two reactive groups which are amine or alcoholic --OH groups but at most primary or secondary amine group and at least one alcoholic --OH group.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: December 21, 1976
    Assignee: Ethylene Plastique
    Inventors: Jean-Claude Decroix, Adrien Nicco
  • Patent number: 3948600
    Abstract: In mild cure finishing, strong catalysts are required because of the modest curing conditions employed in the process. Suitable catalysts for mild cure finishing include strong inorganic acids, strong organic acids, active inorganic complexes, salt/acid combinations, and salts that are strong Lewis acids (i.e, certain metal salts). Ammonium salts of inorganic acids, although often used in other types of treatments for producing wrinkle resistant textiles, are not satisfactory catalysts for mild cure finishing. Unexpectedly and surprisingly, it has been discovered that ammonium salts of certain, but not all, sulfonic acids can serve as effective catalysts for mild cure finishing of cellulose-containing fabrics to produce wrinkle resistance and durable press properties. Among ammonium sulfonates which provide the catalysis needed for mild cure finishing are ammonium methanesulfonate, ammonium carboxymethanesulfonate (NH.sub.4 O.sub.3 SCH.sub.2 COOH), ammonium benzenesulfonate, and ammonium p-toluenesulfonate.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: April 6, 1976
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Robert M. Reinhardt, Russell M. H. Kullman