Patents Assigned to E. I. Du Pont de Nemours and Co.
  • Patent number: 4898704
    Abstract: Coagulating a warp of filaments from a linear spinneret by delivering a transparent, jetted sheet of coagulating liquid equally and uniformly along each side of the warp.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: February 6, 1990
    Assignee: E. I. Du Pont De Nemours & Co.
    Inventor: David W. Luckey
  • Patent number: 4897417
    Abstract: In accordance with the present invention, disclosed herein are compounds of the formula ##STR1## wherein R is straight or branched loweralkyl, R.sub.1 is hydrogen, straight or branched loweralkyl, lowercycloalkyl, amino, loweralkoxy or acylamino, and R.sub.2 is straight or branched loweralkyl, amino, cyclohexyl, morpholino, piperidino, tetrahydrofuranyl, dihydrofuranyl, tetrahydropyranyl, dioxolanyl, 2,2-dimethyl dioxolanyl, dioxanyl, pyrrolidinyl, tetrahydrooxazolyl, and dihydrooxazolyl, and pharmaceutically acceptable salts thereof. The compounds are useful in the treatment of glaucoma.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: January 30, 1990
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Ghanshyam Patil, William L. Matier, Khuong H. X. Mai
  • Patent number: 4897296
    Abstract: An improved fabric is provided for use in a protective garment. The fabric has two composites seamed together. Each composite is formed from a spunbonded olefin which has been laminated to a three-layered thermoplastic film. Compared to a fabric with only one composite layer, various chemicals require more than 2.9 to more than 240 times as much time to penetrate the two-composite fabric of the invention.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: January 30, 1990
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Ben H. Marshall, Jr.
  • Patent number: 4863496
    Abstract: A process for applying and polymerizing a monomeric material to a gas separation membrane to improve the permselectivity of the membrane with respect to at least one pair of gases is disclosed.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: September 5, 1989
    Assignee: E. I. Du Pont de Nemours and Co.
    Inventors: Okan M. Ekiner, Richard A. Hayes, Philip Manos
  • Patent number: 4857552
    Abstract: An injectable, aqueous pharmaceutical composition for the treatment of cardiac conditions comprising an effective amount of methyl 3-[4-(2-hydroxy-3-isopropylamino)propoxy]phenylpropionate hydrochloride (esmolol) for treating such a cardiac condition, said composition comprising about 1 mg to 250 mg of esmolol per milliliter of said injectable pharmaceutical composition; 0.01 to 0.02M buffer; said composition having a pH range of 4.5 to 5.5, the esmolol degrading in aqueous solution to produce 3-[4-(3-propionic acid)phenoxy]-1-isopropylamino-2-propanol hydrochloride, said 3-[4-(3-propionic acid)-phenoxyl]-1-isopropylamino-2-propanol hydrochloride having a pK in the pH range of said composition to thereby act as a secondary buffer to increase the buffer capacity and minimize the change in pH as degradation occurs, whereby the stability of esmolol in an aqueous composition is enhanced.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: August 15, 1989
    Assignee: E. I. du Pont de Nemours and Co.
    Inventors: Leonard S. Rosenberg, Cheryl Black, Earl R. Speicher, Dietmar Wagenknecht
  • Patent number: 4737507
    Abstract: The invention provides a method of combating a microorganism which comprises allowing a heterocyclic pentalene derivative of general formula I ##STR1## wherein X represents an oxygen atom, a sulphur atom or an --SO-- moiety; Y represents a sulphur, selenium or tellurium atom, provided that when Y represents a selenium or tellurium atom X is an oxygen atom; and R.sup.1 and R.sup.2 together represent a --CH.sub.2 --C(CH.sub.3).sub.2 --CCl(CONH.sub.2)-- or --CH.sub.2 --A--CH.sub.2 -- linkage where A is a --CH.sub.2 --, --CH(CH.sub.3)-- or --S(O).sub.n -- moiety, where n is 0, 1 or 2; provided that when X is an oxygen atom and Y is a sulphur atom R.sup.1 and R.sup.2 together represent a --CH.sub.2 --S(O).sub.n --CH.sub.2 -- linkage and when X is an --SO-- moiety and A is a S(O).sub.n --, n is 2; to act on the microorganism or its environment; and such derivatives for use as a therapeutic substance.
    Type: Grant
    Filed: July 9, 1986
    Date of Patent: April 12, 1988
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Susan J. Turner, Michael T. Clark
  • Patent number: 4709042
    Abstract: Described is a process for preparing 2-(1-hydroxyalkyl)-5,5-diphenylhydantoin having the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently hydrogen, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.12 cycloalkyl, C.sub.7 -C.sub.15 aralkyl, unsubstituted or substituted aryl or heteroaryl or alternatively, or R.sub.1 and R.sub.2 together with the carbon atom form a 3 to 12 member cycloalkyl group, the process comprising: reacting diphenylhydantoin with an aldehyde or a ketone in the presence of a strong inorganic base; an alcohol was used as solvent to solubilize the reactants. The reaction is practically complete in 15 minutes.The compounds so prepared are intermediates in the preparation of phenyltoin prodrugs.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: November 24, 1987
    Assignee: E. I. Du Pont de Nemours & Co., (Inc.)
    Inventors: Khuong H. X. Mai, Ghanshyam Patil
  • Patent number: 4699961
    Abstract: Catalysts having high efficiency in preparing olefin polymers while controlling molecular weight distribution are disclosed. The catalysts utilize magnesium siloxide supports and the product polymer molecular weight distribution can be controlled by the catalyst preparation.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: October 13, 1987
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Donald E. Gessell
  • Patent number: 4692446
    Abstract: Novel compounds of the general formula ##STR1## wherein R.sub.1 is lower alkyl, lower cycloalkyl, lower alkenyl, lower alkynyl, lower alkyl carboxymethyl, aryl carboxymethyl, aryl, or aralkyl; A is a direct bond, lower alkylene, or lower alkenylene; x is 1 or 2, provided that when x is greater than 1, different occurrences of the ##STR2## group may be the same or different; Ar is heterocyclic, unsubstituted aromatic or aromatic substituted with lower alkyl, lower alkenyl, lower alkynyl, lower alkoxy, halogen, acetamido, amino, nitro, lower alkylamino, hydroxy, lower hydroxyalkyl or cyano; W is alkylene containing from 1 to about 10 carbon atoms; and B is --NR.sub.2 COR.sub.3, --NR.sub.2 CONR.sub.3 R.sub.4, --NR.sub.2 SO.sub.2 R.sub.3, --NR.sub.2 SO.sub.2 NR.sub.3 R.sub.4, or --NR.sub.2 COOR.sub.5, wherein R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may be the same or different and may be hydrogen, alkyl, alkoxyalkyl, alkoxyaryl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or aralkyl, except that R.sub.3 and R.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: September 8, 1987
    Assignee: E. I. Du Pont de Nemours & Co., Inc.
    Inventors: Paul W. Erhardt, William L. Matier
  • Patent number: 4676430
    Abstract: A self-erecting end-loading top-dispensing container which is convertible from a substantially flattened configuration for shipping the empty container into an erected box-like configuration for loading product into the container and for shipping loaded containers. By removing a tear-away portion of the top panel, the container is convertible into a tray having an open top for dispensing product. Connecting webs join the end closures of the container to the front and rear side walls, preserving the structural integrity of the container when the removable top is torn away.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: June 30, 1987
    Assignees: E. I. Du Pont de Nemours & Co., Rock-Tenn Company
    Inventors: Henry Wischusen, III, Richard J. Fletcher
  • Patent number: 4666924
    Abstract: The present invention relates to new compounds of the formula ##STR1## where X is ##STR2## alkylene, or --S--where R.sub.1 is hydrogen, alkyl, or aryl; W is hydrogen, hydroxy, amino, alkyloxy, aryloxy, O-alkyl, or O-aralkyl; (Y).sub.A) is --CH.sub.2 NR.sub.2 R.sub.3 where R.sub.2 and R.sub.3 may be hydrogen, substituted alkyls, aryls, or together with N form a 5 to 7 membered heterocyclic group; and Ar is a substituted or unsubstituted heteroaryl. These compounds are useful in the treatment of various cardiac arrhythmias.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: May 19, 1987
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: David M. Stout, William L. Matier
  • Patent number: 4657919
    Abstract: Described are compounds of the formula ##STR1## wherein R is hydrogen, lower alkyl, halo, cyano, hydroxy, amino, lower alkylamino, --CH.sub.2 NH.sub.2, --CH.sub.2 OH or --COOR"; R' is hydrogen, lower cycloalkyl or lower alkyl; R' is lower alkenyl, lower alkynyl, lower cycloalkyl, --(W).sub.n Y wherein W is straight or branched chain lower alkyl or lower alkenyl, n is 0 to 5, and Y is Ar, lower cycloalkyl, lower alkenyl, lower alkynyl, --COOZ wherein Z is lower alkyl, ##STR2## or NAB wherein A and B are, independently, lower alkyl, benzyl or substituted benzyl, and Ar is 2, 3 or 4-pyridyl, pyridazinyl, pyrimidinyl, quinolyl, isoquinolyl, phthalazinyl, quinazolinyl, thiazolyl, phenyl, benzyl, furyl, tetrahydrofuryl or thienyl, unsubstituted or substituted with lower alkyl, lower alkoxy, halo, amino, or --CF.sub.3 ; R"' is --COOR", ##STR3## and X is oxygen or nitrogen; or a pharmaceutically acceptable salt thereof, and their use in the treatment of impaired ventricular myocardial contractility.
    Type: Grant
    Filed: July 12, 1985
    Date of Patent: April 14, 1987
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: David M. Stout, Diane M. Yamamoto, Cynthia Barcelon-Yang
  • Patent number: 4618937
    Abstract: Describes a method and system for improving the ability to quantitate the amount of flux or material in localized collections of such flux or material typically called a "spot". Quantitation of spots using a software algorithm which utilizes models in two opposite senses for quantitating peaks in a spot image of an electrophoresis gel is disclosed. The operating system includes a laser gel scanner module, a computer module, system peripherals, and analysis software.
    Type: Grant
    Filed: January 27, 1984
    Date of Patent: October 21, 1986
    Assignee: E. I. Du Pont de Nemours and Co., Inc.
    Inventors: John G. Elias, Peter A. Jansson
  • Patent number: 4603183
    Abstract: A method is provided for preparing hydrocarbon soluble magnesium siloxide supports comprising contacting such supports with sufficient aluminum alkoxide or organic ethers to render the supports hydrocarbon soluble. Thereafter the supports are contacted with a transition metal compound and halogenated to obtain polymerization catalysts.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: July 29, 1986
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Donald E. Gessell
  • Patent number: 4574729
    Abstract: An arrangement for withdrawing supernatant from a deposition surface is provided for use with a cytocentrifuge chamber block. The block receives an absorbent plug in a recess provided therein. The plug is restrained from movement past a predetermined point until a predetermined insertion force corresponding to a predetermined rotor speed is imposed on the plug. At that time a resilient restraining arrangement deflects to permit the plug to advance with respect to the block. The restraining arrangement preferably takes the form of tines resiliently mounted to the plug.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: March 11, 1986
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: John R. Wells
  • Patent number: 4550834
    Abstract: A self-erecting end-loading top-dispensing container which is convertible from a substantially flattened configuration for shipping the empty container into an erected box-like configuration for loading product into the container and for shipping loaded containers. By removing a tear-away portion of the top panel, the container is convertible into a tray having an open top for dispensing product. Connecting webs join the end closures of the container to the front and rear side walls, preserving the structural integrity of the container when the removable top is torn away.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: November 5, 1985
    Assignees: E. I. Du Pont de Nemours & Co., Rock-Tenn Co.
    Inventors: Richard J. Fletcher, Henry Wischusen, III
  • Patent number: 4446059
    Abstract: Conductor composition comprising an admixture of finely divided particles of (a) conductive metal, (b) inorganic binder and (c) a colorant which is a mixture of silver oxide and/or copper oxide or precursor thereof and B.sub.2 O.sub.3.
    Type: Grant
    Filed: April 15, 1982
    Date of Patent: May 1, 1984
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Albert L. Eustice
  • Patent number: 4437952
    Abstract: Multilayer fluorinated cation exchange membranes prepared by coextrusion of precursor polymers.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: March 20, 1984
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Roger A. Smith, Michael S. Withers
  • Patent number: 4437951
    Abstract: An ion exchange membrane which comprises a layer of fluorinated polymer which has carboxylic functional groups, a second layer of fluorinated polymer which has sulfonic or carboxylic functional groups at a surface layer, and a web of support material therein, and which has channels in the membrane which extend from window areas of the membrane to blind areas of the membrane occluded by members of the support material, is described. Precursor membrane which contains both reinforcement members and sacrificial members, and from which the ion exchange membrane is made, is also described. The ion exchange membrane can be used to separate the compartments of a chloralkali cell, and such a cell operates at low voltage, high current efficiency, and low power consumption.
    Type: Grant
    Filed: December 21, 1982
    Date of Patent: March 20, 1984
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Thomas C. Bissot, Walter G. Grot, Paul R. Resnick
  • Patent number: 4434316
    Abstract: Process for separating alkenes, e.g., butene, from alkadienes, e.g., butadiene by preferentially hydrocyanating the diene and thereafter recovering the unreacted alkenes.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: February 28, 1984
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Willie J. Barnette