Patents Assigned to E
  • 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
  • Phosphinylcycloalkylcarbonyl and phosphinylcycloalkenylcarbonyl dipeptides
    Patent number: 4849525
    Abstract: Compounds of the formula ##STR1## and their pharmaceutically acceptable salts wherein Z completes a cycloalkyl ring, a substituted cycloalkyl ring, a cycloalkenyl ring, a substituted cycloalkenyl ring or a saturated heteroalkyl ring; R.sub.2 is lower alkyl, aralkyl or aminoalkyl and X is an amino or imino acid. The compounds possess angiotensin converting enzyme inhibition activity.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: July 18, 1989
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Harold N. Weller, III, Eric M. Gordon
  • Photohardenable electrostatic master containing electron acceptor or donor
    Patent number: 4849314
    Abstract: Photohardenable electrostatic master comprising an electrically conductive substrate, e.g., aluminized polyethylene terephthalate, bearing a layer of a photopolymer comprising an organic polymeric binder, compound having at least one ethylenically unsaturated group, photoinitiator and at least one organic electron acceptor or donor compound, e.g., the acceptor and donor having an oxidation potential of less than +2.5 eV and reduction potential larger than -3.0 eV, respectively. The photohardenable electrostatic master is used for electrostatic proofing, etc.
    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, Curtis R. Fincher, Jr.
  • Circuit for computing the quantized coefficient discrete cosine transform of digital signal samples
    Patent number: 4849922
    Abstract: The circuit consists of two parallel branches which perform multiplication and accumulation operations for the even and odd lines of the transform coefficient matrix. Each branch includes: an input circuit (SEM1, SOT1) whereby the contributions of the opposing index columns of the matrix may be added; a multiplication circuit (ERM, ORM) which performs multiplication operations for each matrix column by an addition and shifting operation for each matrix coefficient; and an accumulation circuit for the intermediate products of each matrix column.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: July 18, 1989
    Assignee: Cselt - Centro Studi E Laboratori Telecomunicazioni Spa
    Inventor: Benedetto Riolfo
  • 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
  • Ethylene copolymers with enhanced fire resistant properties
    Patent number: 4849135
    Abstract: The addition of certain phosphate esters causes ethylene copolymers containing CaCO.sub.3 and/or Ca-Mg/CO.sub.3 and alumina trihydrate to have lower swell on burning and to have smaller and more uniform cell formation in the ceramic ash than compositions without such esters present.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert R. Reitz
  • Method and apparatus for marking on an arcuate surface
    Patent number: 4848942
    Abstract: A marking device includes a plurality of individual marking pin assemblies. Each marking pin assembly is spaced an angular distance from each adjacent marking pin assembly in the marking device to form a generally fan-shaped array. An arcuate object to be marked by the marking device is placed on an object support plate. As the arcuate object is rotated on the object support plate, the plurality of marking pin assemblies in the marking device operate to selectively imprint a plurality of preselected characters in the circumference of the arcuate object.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: July 18, 1989
    Assignee: M. E. Cunningham Company
    Inventor: Edwin W. Speicher
  • 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
  • Herbicidal sulfonamides
    Patent number: 4849010
    Abstract: This invention relates to certain sulfonylurea herbicidal compounds, agriculturally suitable compositions thereof and a method of their use.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: July 18, 1989
    Assignee: E. I. DuPont de Nemours and Company
    Inventor: Craig L. Hillemann
  • Crosslinked polymer microparticle
    Patent number: 4849480
    Abstract: Crosslinked polymer microparticles that have a particle size of about 0.1-5 microns of polymerized monomers of styrene, alkyl methacrylate having 1-12 carbons in the alkyl group, alkyl acrylate having 1-12 carbon atoms in the alkyl group and mixtures thereof, about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group and about 0.1-5% by weight of allyl methacrylate or allyl acrylate; said polymer having a weight average molecular weight of about 500,000 to 5,000,000; polymeric chains are grafted onto the polymer microparticles; the microparticles are useful as additives for coating compositions to control rheology and in particular for metallic pigment flake and sag control.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joseph A. Antonelli, Joseph E. McLaughlin, Clifford H. Strolle
  • Automatic vortex mixer
    Patent number: 4848917
    Abstract: A vortexing mixer drive has a rotatable coupling rod where an end face defines an offcenter countersink with a bore at the center of the countersink. The rod is axially displaced to engage a vessel's protuberant tip to effect rotational movement.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joshua Benin, William G. Di Maio, Carl F. Morin
  • 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
  • Formation fracturing process
    Patent number: 4848467
    Abstract: Hydroxyacetic acid condensation product is used as a fluid loss material in a formation fracturing process in which a fracturing fluid comprising a hydrolyzable aqueous gel is used. The hydroxyacetic acid condensation product degrades at formation conditions to provide hydroxyacetic acid which breaks the aqueous gel, which provides restored formation permeability without the need for separate addition of gel breaker.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: July 18, 1989
    Assignees: Conoco Inc., E. I. Du Pont de Nemours and Company
    Inventors: Lisa A. Cantu, Edward F. McBride, Marion W. Osborne
  • 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
  • Dielectric composition
    Patent number: 4849380
    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) a ceramic filler selected from mullite, mixtures of mullite with fused silica and mixtures of quartz with fused silica.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Howard T. Sawhill
  • Apparatus for molding heat weldable pipe fittings
    Patent number: 4848718
    Abstract: Apparatus and method for producing heat weldable, thermoplastic, tubular pipe fittings for use with heat weldable piping or tubing using a core in a molding machine having at least one pivoted segment collapsible inwardly of the core, each segment bearing radial projections to facilitate winding a heater wire and/or to receive a terminal post during the molding operation.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Gordon Harrison
  • 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
  • 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.
  • Wound care pouch
    Patent number: D302306
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: July 18, 1989
    Assignee: E. R. Squibb and Sons, Inc.
    Inventor: Peter L. Steer
  • Wound care pouch
    Patent number: D302307
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: July 18, 1989
    Assignee: E. R. Squibb and Sons, Inc.
    Inventor: Peter L. Steer