Patents Assigned to E. I. du Pont de Nemour and Company
  • Polynucleotide hydridization assays employing catalyzed luminescence
    Patent number: 4670379
    Abstract: Polynucleotide hydridization assays employing catalyzed luminescence.
    Type: Grant
    Filed: December 19, 1984
    Date of Patent: June 2, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jeffrey A. Miller
  • Oxabicycloalkane herbicides
    Patent number: 4670041
    Abstract: Compounds of the formula ##STR1## wherein X is (--CR.sub.4 R.sub.4 --).sub.m in which m is 0 or 1;Y is (--CR.sub.5 R.sub.6 --).sub.n in which n is 0, 1 or 2;Z is (--CR.sub.7 R.sub.7 --).sub.p in which p is 1, 2, or 3; the sum of m+n+p is an integer of 2 to 5, inclusive;R.sub.2 and R.sub.3 each is H or alkyl, and the like;R.sub.1 is H or alkyl; andW is an unsaturated moiety, are useful as plant growth regulators and herbicides.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: June 2, 1987
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: George B. Payne, Samuel B. Soloway, James E. Powell, Steven A. Roman, Willy D. Kollmeyer
  • Hollow fiber plasmapheresis process
    Patent number: 4668399
    Abstract: Hollow fiber plasmapheresis module and process, said module comprising hollow fibers having cell-retaining pores and an effective length (L) to lumen diameter (D) ratio L/D not greater than 16,400 cm.sup.-1 D (L and D being in centimeters) within a housing having a blood inlet for conducting blood to the fibers, an outlet for conducting exit (plasma-depleted) blood from the fibers, and a plasma outlet for conducting plasma out of the module.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ray B. Duggins
  • Protein translation method
    Patent number: 4668624
    Abstract: An improved method for in vitro synthesis of protein by in vivo processes in an extract from a living organism and containing endogenous ribosomes and endogenous transfer RNA, primarily from endogenous amino acids in said extract primarily by the use of a predetermined exogenous messenger ribonucleic acid (mRNA).An improved method of assaying such a synthesis by the use of a labelled amino acid, which is present during said synthesis and is incorporated into said protein.A kit for carrying out such synthesis and assay comprising a vial of substantially prokaryotic and eukaryotic cell-free extract from a living organism containing endogenous ribosomes, endogenous transfer RNA and endogenous amino acids, a vial containing translation cocktail for promoting the synthesis, and a vial containing control messenger RNA.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: May 26, 1987
    Assignee: E.I. Du Pont de Nemours and Company
    Inventor: Bryan E. Roberts
  • Thiophenesulfonamides
    Patent number: 4668281
    Abstract: Thiophenesulfonamides useful as herbicides and plant growth regulants, herbicidal compositions containing thiophenesulfonamides, and methods of applying the compositions to areas containing undesired vegetation are described.
    Type: Grant
    Filed: April 10, 1986
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Herbicidal pyridinesulfonamides
    Patent number: 4668279
    Abstract: Novel pyridinesulfonamide compounds containing ortho-heterocyclic substituents such as N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-2-(1H-1,2,4-triazol-1-yl)-3 -pyridinesulfonamide display utility as herbicides and plant growth regulants.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Morris P. Rorer
  • Substituted benzoate ester prodrug derivatives of 3-hydroxymorphinans, which are analgesics or narcotic antagonists
    Patent number: 4668685
    Abstract: Substituted benzoate ester prodrug derivatives of 3-hydroxymorphinans are useful as analgesics or narcotic antagonists and provide enhanced bioavailability of 3-hydroxymorphinans from orally administered doses.
    Type: Grant
    Filed: May 14, 1985
    Date of Patent: May 26, 1987
    Assignee: E.I. Du Pont de Nemours and Company
    Inventor: Elie G. Shami
  • Azapropazone prevention of post-ischemic tissue damage
    Patent number: 4668676
    Abstract: Azapropazone can be used to prevent post-ischemic tissue damage in mammals.
    Type: Grant
    Filed: July 15, 1986
    Date of Patent: May 26, 1987
    Assignee: E.I. Du Pont de Nemours and Company
    Inventors: George A. Boswell, William M. Mackin, Martin J. Thoolen
  • Electrocatalytic deposition of metals in solid polymeric matrices
    Patent number: 4668354
    Abstract: A process for depositing metal in the form of an interlayer within a solid matrix. The process is characterized in the use of electroactive transfer agents to carry electrons from the cathode to the desired locus within the matrix where the metal cation (M.sup.n+) is reduced to its zero-valent state. Also disclosed are composites of metallic-interlayer-containing matrices.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Moshe Levy
  • Multilevel imaging of photopolymer relief layer for the preparation of casting molds
    Patent number: 4668607
    Abstract: Process for photofabricating master relief patterns from photohardenable layers, e.g., 0.01 to 0.5 inch (0.25 to 12.7 mm in thickness) which comprises: (1) exposing the layer through the back surface to first imagewise modulated actinic radiation for time to render layer insoluble to first preselected depth which when measured from back surface to less than layer thickness, (2) exposing overall to actinic radiation through back to render layer insoluble to second preselected depth which when measured from back surface is less than first preselected depth. (3) exposing imagewise through front surface to actinic radiation for a time sufficient to render exposed areas of layer insoluble to depth extending from front surface to at least second preselected depth, and (4) solvent removing soluble areas of layer.The master relief pattern is useful in making casting molds.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Michael S. Wojcik
  • Process for manufacturing hydrogen peroxide
    Patent number: 4668499
    Abstract: The invention is an improvement to the cyclic anthraquinone process for making hydrogen peroxide comprising the addition of catalytically effective amounts of an additive to reoxidize inert quinone-degradation species to useful quinones. The additive comprises aromatic tertiary amines having an aqueous pK.sub.a value of about 4 to 9 and the general formula ##STR1## wherein R.sub.1 is a substituted or unsubstituted phenyl group and R.sub.2 and R.sub.3 are the same or different alkyl groups containing 1 to 18 carbon atoms.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John D. Rushmere
  • Process for preparing methylcarbamate insecticides
    Patent number: 4668806
    Abstract: Reacting an alkali metal cyanate salt with dimethyl sulfate in acetonitrile, heating in a steady stream of nitrogen and thereafter immediately bubbling the formed methyl isocyanate into a solution of an appropriate oxime or phenol to form an N-methylcarbamate.
    Type: Grant
    Filed: April 18, 1985
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Joseph J. Mrowca
  • Ink jet printing of printed circuit boards
    Patent number: 4668533
    Abstract: Imagewise deposition of ink onto a substrate such as a circuit board, by ink jet technology, to produce a metal-imaged circuit board.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Joel S. Miller
  • Methyl methacrylate production
    Patent number: 4668818
    Abstract: In the process for the preparation of methyl methacrylate, the addition of aromatic diamine in an acidic environment reduces yellow color in the polymerized product.
    Type: Grant
    Filed: June 18, 1985
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Hayden I. Lipp, Richard H. Squire
  • Heat-strengthening process
    Patent number: 4668454
    Abstract: Use of surfactant in coating of yarn from anisotropic melt-forming polyester with alkali metal salts enhances heat-strengthening acceleration effect.
    Type: Grant
    Filed: June 12, 1985
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Wilton H. Dickerson, Jr., Che-Hsiung Hsu, Michael R. Samuels
  • Crosslinkable antistatic polymers and their manufacture
    Patent number: 4668748
    Abstract: To protect photographic films from imaging by static discharges during manufacturing and customer use, copolymers of sulfonated monomers and primary amine monomers are coated on a film base and crosslinked with an aldehyde such as glutaraldehyde, giving a water-resistant, permanent, conductive (i.e., antistatic) layer.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: May 26, 1987
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William M. Hardam, Frank L. Schadt, III, Arthur J. Taggi
  • Facilitation of orientation of thermotropic polymers in a magnetic field
    Patent number: 4668415
    Abstract: Use of magnetic particles coated with a dispersant to facilitate orientation of anisotropic melt-forming polymers in a magnetic field.
    Type: Grant
    Filed: February 12, 1986
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert R. Luise
  • Cospinning process
    Patent number: 4668453
    Abstract: Cospun yarn essentially free of mechanical defects comprising from about 30 to about 70 weight percent of poly(ethylene terepthalate) filaments containing a basic dye sensitizing unit and the remainder of the filaments being copolyamide filaments of hexamethylene adipamide and small amounts of carpoamide.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Sina Ebnesajjad, Eugene G. Jones
  • Method of making raised relief circuit board with soldered connections having nomenclature applied thereto
    Patent number: 4668603
    Abstract: Nomenclature is applied to a soldermask surface employing a peel apart film prior to application of molten solder.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harvey W. Taylor, Jr.
  • Aromatic polyamide fibers and process for stabilizing such fibers with surfactants
    Patent number: 4668234
    Abstract: An aromatic polyamide fiber containing a large amount of a surfactant, sufficient to enable it to be dyed a deep shade. The high surfactant level enables the fiber to be stabilized, at low temperatures, against progressive laundry shrinkage.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: May 26, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Eric Vance, Bruce A. Barton