Patents Assigned to E
  • Resist material with carbazole diazonium salt acid generator and process for use
    Patent number: 4985332
    Abstract: Excellent resolution and sensitivity in the patterning of resists utilized in device and mask manufacture is obtained with a specific composition. In particular this composition involves polymers having recurring pendant acid labile .alpha.-alkoxyalkyl carboxylic acid ester and/or hydroxyaromatic ether moieties in the presence of an acid generator comprising a novel diazonium salt.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: January 15, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Albert G. Anderson, Walter R. Hertler, Robert C. Wheland, Yuan Yu G. Chen
  • High speed crosslapper
    Patent number: 4984772
    Abstract: A crosslapper is disclosed utilizing at least one foraminous transporting belt to permit rapid escape of entrained air during fast operation of wide-bed machinery.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: January 15, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Kenneth S. Freund
  • Method of fabricating a pinch valve
    Patent number: 4985191
    Abstract: A pinch valve is fabricated by providing an elongated tubular housing with a cut-back portion at an outlet end, applying adhesive to the cut back portion, with a ring around the cut-back portion, placing the housing and ring in a mold and heating all three, providing a core rod inside the housing and forcing an elastomer into the space between the core rod and the housing and between the housing and the ring, curing the elastomer and cooling everything to allow the ring to thermally contract to engage the elastomer between the housing and the ring.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: January 15, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John L. Hannon, Jr.
  • Aramid yarn process
    Patent number: 4985193
    Abstract: A process for preparing high modulus, high tenacity fibers of aromatic polyamide wherein a first constant tension within 40-95% of the fiber breaking load is applied to washed fibers at a temperature of less than 50.degree. C. for a duration of greater than 5 seconds, and drying the fibers at a second constant tension which is from 10-100% of the first constant tension and at a temperature of more than the temperature of the first constant tension and less than 350.degree. C. until the fibers have a moisture content of about 2 to 10%.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: January 15, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Steven R. Allen
  • Midsole for footwear
    Patent number: 4984376
    Abstract: A flexible innersole, or component thereof, for footwear of a foamed thermoplastic multi-block copolymer elastomer having a substantially uniform closed cell structure and having a specific gravity of less than about 0.35, an energy return ratio greater than about 0.55 when compressed and released said foam being prepared from a thermoplastic multi-block copolymer elastomer having a Shore D hardness of 25-45.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: January 15, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Timothy H. Walter, Thomas M. Pontiff
  • Process for preparing phenyl esters of substituted acids
    Patent number: 4985180
    Abstract: Phenyl esters of substituted acids are prepared by a two-step process in which a phenol derivative is first treated with an acid halide to yield a phenyl ester intermediate, and the intermediate is reacted with an appropriate nucleophile.
    Type: Grant
    Filed: June 6, 1989
    Date of Patent: January 15, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Harold E. Bellis, Donald J. Dumas, George C. Sonnichsen, Vinayakam Subramanyam
  • 2-substituted-1-naphthols as 5-lipoxygenase inhibitors
    Patent number: 4985435
    Abstract: 2-Substituted-1-naphthols are 5-lipoxygenase inhibitors which make them useful in the treatment of inflammation, obstructive lung diseases and/or psoriasis. Useful 2-substituent groups are alkyls, alkenyls, alkynyls, cycloalkyls, cycloalkenyls, the groups CH.sub.2 --C.tbd.C--(CH.sub.2).sub.m R.sup.5 and CH.dbd.CH--(CH.sub.2).sub.n R.sup.5 (where m is 1-4, n is 0-3 and R.sup.5 includes phenyl, COOR.sup.9, where R.sup.9 is H or alkyl of 1-4 carbons, AR.sup.6 l (where A is a methylene chain and R.sup.6 is a variety of groups including Cl, Br, I, CHO, CN, COOR.sup.9, NH.sub.2, SC(NH)NH.sub.2, phenyl, P(O)(OR.sup.9).sub.2, etc.), and CHR.sup.7 R.sup.21 (where R.sup.7 is a variety of aromatic and heterocyclic groups and R.sup.21 is H, optionally substituted phenyl and a variety of heterocyclic groups).
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: January 15, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Douglas G. Batt
  • 2-substituted-1-naphthols as 5-lipoxygenase inhibitors
    Patent number: 4985442
    Abstract: 2-Substituted-1-naphthols are 5-lipoxygenase inhibitors which make them useful in the treatment of inflammation, obstructive lung diseases and/or psoriasis. Useful 2-substituent groups are alkyls, alkenyls, alkynyls, cycloalkyls, cycloalkenyls, the groups CH.sub.2 --C.tbd.C--(CH.sub.2).sub.m R.sup.5 and CH.dbd.CH--(CH.sub.2).sub.n R.sup.5 (where m is 1-4, n is 0-3 and R.sup.5 includes phenyl, COOR.sup.9, where R.sup.9 is H or alkyl of 1-4 carbons, AR.sup.6 (where A is a methylene chain and R.sup.6 is a variety of groups including Cl, Br, I, CHO, CN, COOR.sup.9, NH.sub.2, SC(NH)NH.sub.2, phenyl, P(O)(OR.sup.9).sub.2, etc.), and CHR.sup.7 R.sup.21 (where R.sup.7 is a variety of aromatic and heterocyclic groups and R.sup.21 is H, optionally substituted phenyl and a variety of heterocyclic groups).
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: January 15, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Douglas G. Batt
  • Ethylene vinyl alcohol copolymers containing platelet-type mica fillers of multi-layer containers
    Patent number: 4983432
    Abstract: A barrier resin composition is disclosed is which contains 50 to 95 weight percent ethylene/vinyl alcohol copolymer having a melt flow of 0.1 to 100 g/10 minutes as measured at 210.degree. C. and 50 to 5 weight percent mica having a particle size of less than 74 microns and an aspect ratio of from 10 to 150. The composition can be prepared by melt blending a mixture of the ethylene/vinyl alcohol copolymer and the mica. Alternatively, the composition can be prepared by forming a dispersion of this mica in a solution of the ethylene/vinyl alcohol copolymer followed by precipitating the ethylene/vinyl alcohol copolymer.
    Type: Grant
    Filed: December 20, 1988
    Date of Patent: January 8, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas C. Bissot
  • Fixing frame and filter unit for connectors
    Patent number: 4983935
    Abstract: A fixing frame for a flat filter unit having a flat substrate with a pattern of passages for the contact elements of a connector. The fixing frame comprises a metal base plate having a pattern of passages corresponding to said filter unit, and being provided at two opposite edges with upright sides which each merge into guide grooves for accomodation between them of said flat filter unit. The fixing frame being provided with spring-loaded contact elements for contacting the housing or shielding of a connector.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: January 8, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Bob Mouissie
  • Surfaces for X-ray intensifying screens
    Patent number: 4983848
    Abstract: X-ray intensifying screens that can be conveniently and easily used in book cassettes and automatic changer systems are described. These screens have an improved surface made by bonding a thin, clear, transparent, tough, flexible, dimensionally stable polyamide film thereon. The screens display a very low average dynamic coefficient of friction, very good resistant to wear (e.g., gouging and abrasion) and a low static susceptibly which permits long term use in book cassettes and rapid handling incurred in said changer systems.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: January 8, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Susan J. Hunter
  • Cured perfluoroelastomers and their preparation
    Patent number: 4983680
    Abstract: Perfluoroelastomers of tetrafluoroethylene, perfluoro (alkylvinylether) and a cure site monomer crosslinked with organic peroxide curing agent, and a process for their preparation.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: January 8, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Leo Ojakaar
  • Method of simulating by computer the appearance properties of a fabric
    Patent number: 4984181
    Abstract: A direct printing technique for simulating the appearance streaks in fabrics includes the steps of obtaining a data set of yarn physical properties for each yarn in the fabric, programming a digital computer having graphics capability and pixel control of the graphics to average the yarn physical properties and calculating the pixel density from the individual yarn and yarn properties. The pixel density is then displayed as a series of rows of pixels wherein the number of pixels in each row is proportional to the individual yarn property of each yarn in the fabric. A simulation of the actual fabric appearance is obtained by just knowing the constituent yarn properties without having to make the actual fabric. Simulation parameters are confirmed by comparison of simulations with actual fabrics. Simulation parameters are confirmed by comparison of simulations with actual fabrics.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: January 8, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Harvey L. Kliman, Royden H. Pike
  • Sandwich immunoassay for determination of total monoclonal IGG
    Patent number: 4983530
    Abstract: A sandwich immunoassay for determining total monoclonal IgG content in samples of purified IgG, cell culture medium and ascites fluid is provided based on the utilization of anti-light-chain IgG antibodies as both capture and label antibodies.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: January 8, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Charles W. Carlson
  • Optoelectrical connector device and optical plug socket therefor
    Patent number: 4983011
    Abstract: An optoelectrical connector device comprising a first and a second optical terminal connected to a main optical transmission line, a third optical terminal connected to a subsidiary optical transmission line, a first and a second light receiving means, and a first and a second light emitting means. The second light receiving means and the first light emitting means are optically connected to each other, and transmit a signal to a first information processing unit and receive the processed signal from it. The second optical terminal is connected optically to the first light receiving means and the second light emitting means, and transmits a signal to the first information processing unit and receives the processed signal from it. The third optical terminal is connected optically to the first light receiving means and transmits a signal to a second information processing unit.
    Type: Grant
    Filed: November 20, 1989
    Date of Patent: January 8, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Toshiyasu Tanaka, Nozomi Tsuzaki, Toyohiro Kobayashi
  • .beta.-(keto or sulfonyl)esters from reaction of silylketene acetal and acyl or sulfonyl compound
    Patent number: 4983679
    Abstract: Silylketene acetals, including "living" GTP polymers, are acylated or sulfonylated in the presence of GTP-effective catalysts with acyl or sulfonyl compounds to produce .beta.-ketoesters or .beta.-sulfonylesters; polymeric products, including capped, coupled and chain-extended polymers and block copolymers can be prepared.
    Type: Grant
    Filed: April 11, 1989
    Date of Patent: January 8, 1991
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Gordon M. Cohen, Hans J. Reich
  • Production of aromatic polyimide membranes
    Patent number: 4983191
    Abstract: A process of producing a polyimide gas separation membranes comprising adding an oligomeric or polymeric aromatic epoxy resin to the dope solution, the resin being soluble in the polyimide or polyamic acid precursor, the solvent and the final membrane and the membrane comprising a blend of the polyimide and the resin.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: January 8, 1991
    Assignees: E. I. Du Pont de Nemours and Company, L'Air Liquide S.A.
    Inventors: Okan M. Ekiner, Richard A. Hayes
  • Portable box
    Patent number: 4982863
    Abstract: A portable box comprises a box body including a bottom and a circumferential, upright wall defining at its upper rim an opening, a cover closing the opening as well as a handle means in form of a preferably hoop-shap=ed handle. The handle is pivotally hinged relative to the box body and the cover, a locking device being provided in the hinged area of said handle, where said locking device allows an opening or closing of the cover of the box body in a first portion of the turning movement of the handle and in other portions of said turning movement prevents an opening of the cover.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: January 8, 1991
    Assignee: A/S E. Danberg Group
    Inventor: Hans Skillius
  • Antenna with enhanced gain
    Patent number: 4983988
    Abstract: The present invention will yield enhanced gain over a conventional antenna system by taking advantage of combining directional antennae. In one embodiment, the invention utilizes four 10 dB dipole, vertically-polarized, omni-directional antennae having a reflector added to each one to limit the horizontal beamwidth to 90.degree. and increase the gain to 16 dB. The vertical beamwidth remains at 7.degree.. By utilizing four of these antennae and utilizing power combining hybrids to connect each of the two opposed antennae together, excess gain over a 10 dB omni-directional system will be obtained. The effective antenna gain is equal to the directional antenna gain minus the omni-directional antenna gain minus the hybrid loss. Thus, the vertical beamwidth and physical height of the antenna are preserved with the increase in gain at the cost of a little antenna complexity.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: January 8, 1991
    Assignee: E-Systems, Inc.
    Inventor: Ernest A. Franke
  • Preparation of cyano-containing perfluoropolymers having iodine curesites
    Patent number: 4983697
    Abstract: In the preparation of perfluoropolymers by the interpolymerization of tetrofluoroethylene, perfluro (alkyl vinyl) ether and cyano-cure site monomer, the improvement of incorporating iodo moieties by the reaction of iodo-compounds of the formula RI.sub.n, in which R is a hydrocarbon or halocarbon radical of 1 to 8 carbon atoms and n is 1 or 2.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: January 8, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Anestis L. Logothetis