Patents Assigned to I
  • Process for metering color concentrates to thermoplastic polymer melts
    Patent number: 4848915
    Abstract: Continuous strands of color concentrate are metered into the feed zone of a screw-melter polymer extruder where they are cut into pellets by the shearing action of the flights of a rotating screw against the extruder housing. These pellets are mixed within the extruder with a thermoplastic polymer to be colored and this mixture is then melted and extruded into a useful article, for example, a fiber for textile or carpeting end-use.Additionally, color concentrates can be first formed into continuous strands and stored conveniently on a spool for subsequent metering into the polymer extruder.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William A. Fintel
  • Method and apparatus for high resolution liquid toner electrostatic transfer
    Patent number: 4849784
    Abstract: A transfer device and method of its use for an electrostatic imaging system using liquid toner capable of generating images having very high resolution at fast speeds. The station includes three sections, an electrically biased tack down roller, a transfer corona station and a transfer medium separator. These sections are located to prevent the onset of turbulence in the liquid toner.
    Type: Grant
    Filed: November 4, 1987
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Graciela B. Blanchet-Fincher, Kerin S. Benack, Arthur J. Taggi
  • Clindamycin-2-phosphoryl benzylate
    Patent number: 4849515
    Abstract: A novel compound, also known as 7(s)-chloro-7-deoxylincomycin-2-phosphoryl benzylate, useful an an intermediate in the production of the antibiotic, clindamycin-2-phosphate.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William L. Matier, Chi Woo, Ying-Chi Lee
  • Positive-working color proofing film and process
    Patent number: 4849322
    Abstract: Photopolymer positive surprint color proofing film based on epoxy acrylate monomer exhibits low dot gain, low time dependence of toning and good tonal range. Binder can be methylmethacrylate/ethyl acrylate/acrylic acid copolymer, preferably cross-linked with zinc ions and plasticized with a second acrylate monomer and a mixture of triacetin and trimethylol propane.
    Type: Grant
    Filed: January 6, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Richard D. Bauer, John G. Buzzell, Rusty E. Koenigkramer
  • Combined door and tool tray in tractor engine housing
    Patent number: 4848498
    Abstract: An improved vertical service door for a tractor engine housing of the vertically-hinged horizontally swingable type. The vertical service door has a lower panel hinged to the lower edge of an upper panel, and means to support the lower panel in a horizontal position when the door is open so that it may serve as a tool tray during engine service. Some preferred embodiments include an inwardly-turned edge forming a vertical retaining edge for the tray and a rod/J-slot linkage between the upper and lower panels to support the lower panel in its horizontal position.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: July 18, 1989
    Assignee: J. I. Case Company
    Inventors: Ronald E. Hart, Robert T. Peterson
  • Dielectric composition
    Patent number: 4849379
    Abstract: A composition for making low K dielectric layers which is an admixture of finely divided solids consisting essentially of (a) lead-free amorphous borosilicate glass containing Al.sub.2 O.sub.3, a mixture of oxides of alkali metals, alkaline earth metals or mixtures thereof containing Li.sub.2 O and (b) an inorganic filler selected from quartz and mixtures of quartz with 0.5-5% wt. inert oxides having a TCE equal to or greater than 7.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Cornelius J. McCormick
  • Method of making acrylonitrile
    Patent number: 4849539
    Abstract: This invention relates to highly attrition resistant catalysts, catalyst precursors and catalyst supports and to processes for making and using them.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Horacio E. Bergna
  • Process for preparing lymphokine activated killer cells
    Patent number: 4849329
    Abstract: There are disclosed an improved process for preparing lymphokine activated killer (LAK) cells from peripheral blood mononuclear cells, a composition consisting essentially of the LAK cells prepared from the disclosed process in a pharmaceutically acceptable carrier, and a method of treating cancer comprising administering the disclosed composition to a patient suffering from said cancer.
    Type: Grant
    Filed: April 20, 1987
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kam H. Leung, John J. Rinehart
  • Resealable lid structure for a container
    Patent number: 4847050
    Abstract: A lid structure is formed of conjoined upper and lower sheets of material. One of the sheets has a receptacle formed therein which receives an elastomeric pad. The portion of the conjoined first and second sheets form a sealing flange which completely surrounds the periphery of the receptacle and which provides a surface whereby the lid may be secured to a container.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Richard S. Jenkins, Robert L. Stozek
  • Titanium dioxide pigment, electrophoretic coating compositions including such pigment, and method for treating titanium dioxide pigment
    Patent number: 4846891
    Abstract: A process is disclosed for producing TiO.sub.2 pigment which is substantially improved for use in electrophoretic coating compositions. The process comprises adjusting an aqueous slurry of the pigment to a pH of about 6.5-7.5, maintaining such pH at a temperature and for a time which is sufficient to maintain substantial equilibrium, and washing the pigment. There also is disclosed TiO.sub.2 pigment which is produced by the foregoing process.
    Type: Grant
    Filed: July 22, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont of Nemours and Company
    Inventor: Juergen H. Braun
  • Substrates coated with organo-silanes that are sterically-protected
    Patent number: 4847159
    Abstract: This invention involves unique compositions consisting of substrates coated with organo-silanes that are sterically protected by a single bulky group. This material consists of an appropriate reactive solid to which is attached a silane whose silicon stom is bonded to a functional group that contains a dimethyl-substituted tertiary carbon.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joseph L. Glajch, Joseph J. Kirkland
  • Process for preparing fluorocarbon polyethers
    Patent number: 4847427
    Abstract: An improvement in a process for neutralizing perfluorinated carboxylic acids to make fluorocarbon polyethers in which the acid is heated with fluorine in the presence of a metal fluoride.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Mario J. Nappa
  • Herbicidal sulfonamides
    Patent number: 4846874
    Abstract: Novel N-(heterocyclicaminocarbonyl) substituted thiophene- , furan- and pyrrolesulfonamides, such as N-[(4-methoxy-6-methylpyrimidin-2-yl)aminocarbonyl]-6,7-dihydro-5H-thieno- [3,2-b]thiopyran-3-sulfonamide. 4,4-dioxide and N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-6,7-dihydro-5H-thieno[3,2-b ]thiopyran-3-sulfonamide, 4,4-dioxide and their method-of-use as herbicides are described.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert J. Pasteris
  • Process for production of sodium cyanide
    Patent number: 4847062
    Abstract: A process for producing anhydrous sodium cyanide crystals by absorbing hydrogen cyanide synthesis gas that contains oxides of carbon and water in aqueous sodium hydroxide and crystallizing the sodium cyanide solution that results from the absorption. The sodium carbonate that forms in the absorption is not removed prior to crystallization.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Janet M. Rogers, Harold F. Porter
  • Process for preparing a fiber reinforced resin matrix preform
    Patent number: 4846908
    Abstract: Process for preparing preforms and composite articles from carbon fiber reinforced matrix resins braided to shape on a mandrel and then converting to final composite article by fully or partially curing in a mold followed by post curing if required.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donald C. Aldrich, Robert C. Buchanan, John F. Sollinger
  • Hybrid acrylic star polymers
    Patent number: 4847328
    Abstract: Hybrid star polymers with functional acrylic arms and crosslinked cores.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Clyde S. Hutchins, Harry J. Spinelli
  • Electroplating bath and process for maintaining plated alloy composition stable
    Patent number: 4846941
    Abstract: A plating bath and process for electroplating coatings of palladium nickel alloys on a conductive substrate at current densities in the range of 10 amps/sq. ft. to 150 amps/sq. ft. wherein the palladium content of the alloy remains substantially constant despite current density variations during plating. The alloy composition stability is achieved by adding at least about 15 parts per million of iodate ions to the plating bath.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arthur H. Graham, Kenneth B. Keating
  • Electrical connector with pin retention feature
    Patent number: 4847588
    Abstract: An electrical connector comprising a header with a plurality of terminal pins having means for retaining the header in position during soldering to a printed circuit board. Retention is accomplished by an offset formed as a crimp at the insertion end of at least one pair of terminals. The crimps exert opposite normal forces against one surface of their respective holes to retain the header during soldering.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ray C. Doutrich
  • Tool for forming a spinneret capillary
    Patent number: 4847464
    Abstract: An electrode for use with electric discharge machining in forming a complex spinneret orifice having concentric annular passages is made of a plurality of concentric male segments formed to correspond to the configuration of the passages.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Samuel E. Moore, Sr.
  • Balloon and manufacture thereof
    Patent number: RE32983
    Abstract: Polymeric balloon having a burst pressure of at least 200 psi (1.4 MPa) and a radial expansion beyond nominal inflated diameter of less than 5% at 200 psi (1.4 MPa).
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stanley B. Levy