Patents Represented by Attorney James A. Costello

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  • Ion exchange membranes
    Patent number: 4454247
    Abstract: Vinyl ether monomers derived from diesters of the formula: ##STR1## wherein R is CH.sub.3 or C.sub.2 H.sub.5 and n is 0 to 10; copolymers of the vinyl ether monomers with one or more selected perfluorinated monoolefins; articles of manufacture made from the copolymers; process for making the diesters; process for using copolymer membranes in a chlor-alkali cell.
    Type: Grant
    Filed: September 1, 1982
    Date of Patent: June 12, 1984
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Paul R. Resnick
  • Bis(aminoneopentyl) aromatics and polyamides derived therefrom
    Patent number: 4451642
    Abstract: Aromatic-aliphatic diamines of the formula ##STR1## in which Ar is an arylene or substituted arylene are useful in preparing thermally stable, rigid, polyamides, polyureas and polyurethanes having a repeating unit of the formula ##STR2## in which Ar is arylene or substituted arylene, X is --NH-- or --O--, n is 0 or 1, and R is a divalent organic radical. Polymers of this invention can be melt-spun into thermally stable fibers.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: May 29, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: August H. Frazer, John F. Harris, Jr.
  • Process for converting nitriles to carboxylic esters
    Patent number: 4450112
    Abstract: Reaction of a nitrile, an alcohol and water in the presence of a catalyst comprising rhodium, iridium or platinum complexed with hydroxo and tertiary phosphine moieties, to produce the corresponding carboxylic ester.
    Type: Grant
    Filed: November 25, 1981
    Date of Patent: May 22, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stanley S. Wreford
  • Method of making a photosensitive elastomeric composition
    Patent number: 4446220
    Abstract: Photosensitive elastomeric compositions comprising about 40 to 90 weight percent of a heat workable, carboxyl- and sulfur-containing polymer of a diene; about 2 to 50 weight percent of a nongaseous, ethylenically unsaturated compound; and about 0.001 to 10 weight percent of a radical generating system; the compositions being useful for making flexographic printing plates.
    Type: Grant
    Filed: August 27, 1982
    Date of Patent: May 1, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stephen Proskow
  • Vinyl ethers monomers and polymers therefrom
    Patent number: 4440917
    Abstract: Vinyl ether monomers derived from diesters of the formula: ##STR1## wherein R is CH.sub.3 or C.sub.2 H.sub.5 and n is 0 to 10; copolymers of the vinyl ether monomers with one or more selected perfluorinated monoolefins; articles of manufacture made from the copolymers; process for making the diesters; process for using copolymer membranes in a chlor-alkali cell.
    Type: Grant
    Filed: September 1, 1982
    Date of Patent: April 3, 1984
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Paul R. Resnick
  • Antibodies to immunogenic peptides and their use to purify human fibroblast interferon
    Patent number: 4438030
    Abstract: Antibodies to the twenty-one acid peptide: (X-Ser-Tyr-Asn-Leu-Leu-Gly-Phe-Leu-Gln-Arg-Ser-Ser-Asn-Phe-Gln-Y-Gln-Lys-L eu-Leu).sub.n, where X is Met or Ser, Y is His or Cys and n is 1 to 12; peptide/protein conjugates and antibodies thereto; process for producing the antibodies; and processes for assaying human fibroblast interferon and for purifying it.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: March 20, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David J. Ganfield, Michael W. Hunkapiller, Ernest Knight, Jr., Bruce D. Korant
  • Phosphine azacrown ether compounds
    Patent number: 4432904
    Abstract: Phosphine azacrown ethers and complexes thereof with selected cations as promoters for hydroformylation catalysts; adducts of said promoters with selected hydroformylation catalysts; process for making the promoters; and process for hydroformylation.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: February 21, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Stephan J. McLain, Francis J. Waller
  • Aqueous processible, alcohol resistant flexographic printing plates
    Patent number: 4431723
    Abstract: Photosensitive elastomeric compositions comprising about 40 to 90 weight percent of a heat workable, carboxyl- and sulfur-containing polymer of a diene; about 2 to 50 weight percent of a nongaseous, ethylenically unsaturated compound; and about 0.001 to 10 weight percent of a radical generating system; the compositions being useful for making flexographic printing plates.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: February 14, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stephen Proskow
  • Cyclic monomers derived from trifluoropyruvate esters
    Patent number: 4429143
    Abstract: Perhalogenated dioxoles, halogenated dioxolanes, a process for making the dioxoles and dioxolanes, and polymers of dioxole and dioxolane monomers.
    Type: Grant
    Filed: September 28, 1981
    Date of Patent: January 31, 1984
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Burton C. Anderson, David C. England, Paul R. Resnick
  • Alkali metal salts of low molecular weight polyethylene terephthalate as nucleating agents for polyethylene terephthalates
    Patent number: 4425470
    Abstract: Alkali metal salts of ethylene terephthalate oligomers as nucleating agents for polyethylene terephthalate; (i) the nucleation process; (ii) a polyethylene terephthalate molding composition; and (iii) the product made by the nucleation process.
    Type: Grant
    Filed: August 6, 1982
    Date of Patent: January 10, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Dana S. Garcia
  • Process for zone refining with a helical solution zone
    Patent number: 4423248
    Abstract: A process for refining an impure material using a helical solution zone and employing a common solvent for both material to be purified and impurity.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: December 27, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Philip J. Rennolds
  • Aqueous processable, positive-working photopolymer compositions
    Patent number: 4415651
    Abstract: Three-component aqueous processable, positive-working photopolymer compositions comprising (i) an unsaturated polymer, (ii) a reactive mercapto acid and (iii) a radiation-sensitive, radical-generating initiator; substrates coated with such compositions; and a photoimaging process.
    Type: Grant
    Filed: January 4, 1982
    Date of Patent: November 15, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stephen Proskow
  • Aqueous processable, positive-working photopolymer compositions
    Patent number: 4415652
    Abstract: Three-component aqueous processable, positive-working photopolymer compositions comprising (i) an unsaturated polymer comprising (a) about 20 to 1000 milliequivalents of reactive unsaturated carbon to carbon groups per 100 g of polyene and (b) about 10 to 50 mol percent of N-alkenylmaleimide units; (ii) a reactive mercapto acid and (iii) a radiation-sensitive, radical-generating initiator; substrates coated with such compositions; and a photoimaging process.
    Type: Grant
    Filed: July 27, 1982
    Date of Patent: November 15, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Stephen Proskow
  • Vinyl ether monomers and polymers therefrom
    Patent number: 4414159
    Abstract: Vinyl ether monomers derived from diesters of the formula: ##STR1## wherein R is CH.sub.3 or C.sub.2 H.sub.5 and n is 0 to 10; copolymers of the vinyl ether monomers with one or more selected perfluorinated monoolefins; articles of manufacture made from the copolymers; process for making the diesters; process for using copolymer membranes in a chlor-alkali cell.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: November 8, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Paul R. Resnick
  • Chlorination and crosslinking of selected polymers with Cl.sub.2 O or HOCl
    Patent number: 4405760
    Abstract: Contacting selected polymers with Cl.sub.2 O or HOCl to effect (1) substitution of chlorine for hydrogen bonded to carbon, and (2) crosslinking when the polymer contains carbon-carbon unsaturation.
    Type: Grant
    Filed: December 28, 1981
    Date of Patent: September 20, 1983
    Assignee: E. I. Du Pont de Nemours & Company
    Inventors: Edward G. Howard, Jr., Frank D. Marsh
  • Optically active tert-alkyl 7-(2-oxo-5-carbonyloxypyrrolidinyl)heptanoates
    Patent number: 4399290
    Abstract: Optically active tert-alkyl 7-2(oxo-5-carbonyloxypyrrolidinyl)heptanoates and their preparation by reaction of racemic tert-alkyl 7-(2-oxo-5-carboxypyrrolidinyl)heptanoate with an optically active amine to form resolved d or l amine salts which are then reacted with acid to form resolved acid intermediates. Esterification of these acid intermediates produces resolved d or l esters which are useful to make optically active 8-azaprostanoids having biological activity.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: August 16, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard M. Scribner
  • Alkyl-.omega.-fluoroformyl ester and process
    Patent number: 4390720
    Abstract: Process for making alkyl-.omega.-fluoroformyl esters of the formula ##STR1## wherein R is CH.sub.3 or C.sub.2 H.sub.5 and n is 0 or an integer from 1 to 3, by reacting the methyl or ethyl ester of trifluoropyruvic acid with hexafluoropropene oxide in the presence of fluoride ion catalyst, in an aprotic liquid medium; and the ester wherein n=0.
    Type: Grant
    Filed: October 14, 1981
    Date of Patent: June 28, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Paul R. Resnick
  • Glycidyl methacrylate polymers, their preparation and solvolysis products
    Patent number: 4388448
    Abstract: Homopolymers of glycidyl methacrylate (GMA) and copolymers of GMA with other methacrylate comonomers; their preparation employing an anionic initiator which is the adduct of a selected organo(alkali metal) compound and at least one mole of methyl methacrylate or another lower alkyl methacrylate; as well as solvolyzed forms of the GMA polymers.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: June 14, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lester R. Melby
  • Use of fluoroalkoxysulfur fluorides in fluorinations
    Patent number: 4382891
    Abstract: Fluoroalkoxysulfur fluorides of the formula ##STR1## wherein R is H, CH.sub.3, CF.sub.3, or C.sub.2 F.sub.5, and n is 1 or 2, used as fluorinating agents to replace OH groups in organic molecules with F and halocarbon solutions of lithium fluoroalkoxides.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: May 10, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William J. Middleton
  • Preparation of fluorocarbonyl compounds
    Patent number: 4357282
    Abstract: Fluorinated carbonyl compounds are prepared by contacting a fluorinated methyl or ethyl ether containing at least one methoxylated carbon atom-containing group selected from: --CF.sub.2 OR.sup.3, .dbd.CFOR.sup.3, ##STR1## wherein R.sup.3 is CH.sub.3 or C.sub.2 H.sub.5, with a catalyst selected from:SbX.sub.5, TaX.sub.5, NbX.sub.5, AsX.sub.5, BiX.sub.5, TiX.sub.4, ZrX.sub.4, HfX.sub.4, FeX.sub.3,mixtures of SbX.sub.3 and SbX.sub.5, ZM'X'.sub.6, and mixtures of ZM'X'.sub.6 and M'X.sub.5 where X, independently, is F, Cl, Br or I, X' is F or Cl; and Z is H, NO, O.sub.2, alkali metal or NY.sub.4 where Y, independently, is H or alkyl of 1 to 6 carbon atoms, and M' is Sb or As at a temperature of -20.degree. to 200.degree. C.
    Type: Grant
    Filed: April 3, 1981
    Date of Patent: November 2, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Daniel G. Anderson, David C. England, Alwin S. Milian, Jr.