Patents Assigned to E
  • 1,2,3,4-tetrahydro-8-quinolinol derivatives and anti-allergic use thereof
    Patent number: 4843082
    Abstract: Leukotriene biosynthesis in macrophage cells is inhibited by compounds having the formula ##STR1## and pharmaceutically acceptable salts thereof, wherein R.sub.1 and R.sub.2 are each hydrogen and R.sub.3 is alkyl or arylalkyl;R.sub.1 and R.sub.3 are each hydrogen and R.sub.2 is arylmethyl or arylcarbonyl;R.sub.1 is methyl, R.sub.2 is arylmethyl and R.sub.3 is hydrogen; orR.sub.1 is alkyl of seven or more carbons or arylalkyl and R.sub.2 and R.sub.3 are each hydrogen.
    Type: Grant
    Filed: May 5, 1986
    Date of Patent: June 27, 1989
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Scott A. Biller, Raj N. Misra
  • Preparation of promoted silica catalysts
    Patent number: 4843057
    Abstract: A silica catalyst that retains its high initial activity for a longer time is obtained by forming the catalyst from an aquasol that was obtained by mixing an alkali metal aluminate with an aqueous solution of alkali metal silicate.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: June 27, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael B. D'Amore, Nutan K. Pande
  • Pressurized mixing injector
    Patent number: 4842777
    Abstract: The invention relates to a multiple liquid injector composed of several identical elementary injection tubes 2, disposed in a rim around a central tube. Each tube 2 has an inlet conduit 3, itself comprising a converging truncated cone 6 and a cylinder 7, followed by an aeration zone 4 comprising an aeration chamber 8 fed tangentially by a conduit 9 perpendicular to the tubes 2, a jet centering funnel 10, followed by mixing cylinder 11, and lastly a diverging outlet conduit 12.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: June 27, 1989
    Assignees: E & M Lamort, Feldmuhle AG
    Inventor: Jean-Pierre Lamort
  • High temperature filter felt
    Patent number: 4840838
    Abstract: A high temperature filter felt comprising a scrim and an entangled batt. The machine-direction component of the scrim is made up of intermeshed continuous filament yarns which are 40 to 75% glass fibers and 25 to 60% poly(tetrafluoroethylene) fibers. The fiber of the cross-machine direction component of the scrim is glass, poly(tetrafluoroethylene), aramid, polyacrylate, polyphenylene sulfide or blends of these fibers or the bulked yarn previously described at the machine-direction yarn.
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: June 20, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Kurt H. Wyss
  • Preparation of tris(2-cyanoethyl)amine
    Patent number: 4841092
    Abstract: A process for the production of tris(2-cyanoethyl)amine from acrylonitrile by reacting acrylonitrile with an ammonium salt dissolved in water at a pH of less than 7.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: June 20, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Robert A. Smiley
  • Method of accessing local area networks with a unidirectional ring-transmission line, and local area network using this method
    Patent number: 4841523
    Abstract: A method of accessing a local-area network which allows transmission on a unidirectional ring, of circuit-switched or packet-switched communications organized in hybrid frames, in which overlapping between the beginning of a frame and a residual of the preceding frame which is still to reach its destination is avoided without reporting to a rigid band allotment to the indiviual communications and to a network synchronization system, where a well defined node acts as a master clock. According to the method the individual nodes of the network, access in sequence the transmission line in each frame, maintaining the same order of asynchronous access in the circuit and packet regions.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: June 20, 1989
    Assignee: Cselt Centro Studi e Laboratori Telecomunicazioni S.p.A.
    Inventors: Daniele Roffinella, Maurizio Sposini
  • Mammary prosthesis
    Patent number: 4840629
    Abstract: A "MAMMARY PROSTHESIS", including a perforated lamina (10) made of an inert nd flexible material, having a thickness not exceeding 1.0 mm and showing, when flattened, the approximate shape of an annular sector, with an extension of about 180.degree. to about 220.degree., the inner diameter and the flexibility of the lamina in annular sector being sized in order to allow that, with the insertion of the prosthesis between the mammary gland and the datached skin, the lamina (10) will assume a substantially frustoconical shape having a slightly convex side surface and with the inner peripheral edge surrounding the mammary areola at a certain distance, the ends of the inner peripheral edge of the lamina (10) being close to each other, in such a way to occupy one of the positions adjoining and overlapping one another and the extreme edges of the lamina remaining angularly spaced apart.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: June 20, 1989
    Assignee: Silimed Silicone E Instrumental Medico-Cirurgico e Hospitalar Ltda.
    Inventor: Ricardo A. Bustos
  • Method for unwinding elastic tape
    Patent number: 4840695
    Abstract: A method for unwinding an elastic strip material from a package that has a propensity to stick to itself. The method includes heating the surface of the package to reduce the sticking propensity of the material. Allows unwinding at controlled elongation.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: June 20, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas E. Benim
  • Radiation process for preparation of electrophoresis gel material
    Patent number: 4840756
    Abstract: Describes a process for controlling the polymerization and cross-linked density of electrophoretic gel products useful for separation of bioorganic molecules, which process does not use initiators common to processes of the art. Electron beam polymerized gels afford the desired advantages of being ultra thin and having a high electrophoretic resolution with programmable porosity profiles.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: June 20, 1989
    Assignee: E. I. Du Pont Nemours and Company
    Inventors: Richard C. Ebersole, Robert P. Foss
  • Flexible cable guide with two-directional joints
    Patent number: 4840023
    Abstract: The flexible cable guide consists of a plurality of double-T shaped elements having curved flanges defining aligned cylindrical spaces, separated from one another by a central web of the shaped element, the elements being connected to each other by two-directional joints, a plurality of electrical supply, communications and the like cables being lodged in the cylindrical spaces defined by the curved flanges.
    Type: Grant
    Filed: September 15, 1987
    Date of Patent: June 20, 1989
    Assignee: Tecno S.p.A. Mobili e Forniture per Arredamento
    Inventor: Paolo Borsani
  • Draining valve for waste paper processing appliances
    Patent number: 4838301
    Abstract: A valve arrangement has an outflow seat section defined by at least a tubular side wall. The outflow seat section has a free end with an engaging part extending along the entire periphery of the side wall. The engaging part is adapted for close engagement with an engaging surface of a movable obturating plate. The engaging surface is substantially parallel to a plane of the engaging part and remains substantially parallel to this plane during movement of the obturating plate toward and from the free end of the outflow seat section. During operation of the valve arrangement the engaging surface of the obturating plate simultaneously engages the entire plane of the engaging part of the outflow seat section causing closing of the valve arrangement.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: June 13, 1989
    Assignee: E & M Lamort
    Inventor: Jean-Pierre Lamort
  • Divalent metal salts improve compositions of asymmetrical triazine mixtures
    Patent number: 4838927
    Abstract: Asymmetrical triazines form stable tank mixtures with trifluralin in the presence of an effective amount of a suitable divalent metal salt.
    Type: Grant
    Filed: December 5, 1986
    Date of Patent: June 13, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William T. Hall
  • Recording system for irradiation therapy
    Patent number: 4839266
    Abstract: A recording system for megavolt irradiation therapy, in which the recording is carried out by the therapeutic irradiation during the entire period of irradiation, comprising a silver halide film that has a gradation of at least 4 when exposed with visible light and of metal foils having atomic numbers of 22 to 50. It has improved image quality compared with known systems.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: June 13, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gunther Demuth
  • Process and composition for oral hygiene
    Patent number: 4839158
    Abstract: A process for enhancing oral hygiene by reducing oral microflora and for inhibiting the formation of dental plaque by applying, to the oral cavity, a composition containing(a) 0.1 to 40 parts, by weight, of a higher alkyl-N-betaine, having the structure ##STR1## wherein N is a higher alkyl group of from 10-18 carbon atoms, and (b) 0.1 to 40 parts, by weight, of a higher alkyl-N, N-dimethylamine, having the structure ##STR2## wherein R is a higher alkyl group of from 10 to 18 carbon atoms, and (c) acid in an amount sufficient to adjust the pH of the composition from 4.5 to 7.5 when measured in an aqueous solution of components (a) and (b) in a orally acceptable carrier.
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: June 13, 1989
    Assignee: E. B. Michaels Research Associates Inc.
    Inventor: Edwin B. Michaels
  • Process for the preparation of large diameter oriented monofilaments
    Patent number: 4839132
    Abstract: Oriented polymeric monofilaments having a diameter of at least about 60 mils and excellent uniformity in roundness, are prepared in which a core of semi-crystalline linear condensation polymer is melt extruded, quenched to a substantially void-free condition, coated with additional polymer to increase the diameters by about from 10 to 100 mils, quenched to a substantially void-free condition, and oriented by drawing about 3.5 times its original length within the orientation temperature range of the polymer.
    Type: Grant
    Filed: February 25, 1987
    Date of Patent: June 13, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Teh-Chuan Wang
  • Power connector
    Patent number: 4838809
    Abstract: A power connector for connecting a multiconductor cable and a printed circuit board. The power connector includes a connector block with two pivotable longitudinal walls, each having a comblike edge which, when pivoted upwards, meet to define a plurality of slots which receive and maintain the conductor of the cable. The connector block is received within a connector cover, and the assembly is mounted on a pin holder disposed on a base plate. The contact pins of the pin holder project upwards to contact the conductors of the cable and downward to contact the printed circuit board.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: June 13, 1989
    Assignee: E. I. DuPont de Nemours and Co.
    Inventor: Bob Mouissie
  • System for automatically controlling the gain-bandwidth product of operational amplifiers
    Patent number: 4839610
    Abstract: A system for automatically controlling the gain-bandwidth product of operational amplifiers, wherein a gain-bandwidth product (G*B) of one of the amplifiers placed on the same chip as the amplifiers to be controlled is measured and the resulting signal is used to control through a bias circuit, the gain-bandwidth products of all the amplifiers, the value of these products being presettable by the frequeny of a control signal sent to the system input. The reference amplifier is highly compensated in the configuration of voltage follower.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: June 13, 1989
    Assignee: Cselt-Centro Studi E Laboratori Telecomunicazioni S.p.A.
    Inventors: Michelangelo Mazzucco, Vanni Poletto, Mario Sartori
  • Direct positive dimethine cyanine dyes containing 1-aryl-2-heteroaryl indole nucleus
    Patent number: 4839271
    Abstract: A fogged direct positive photographic silver halide emulsion containing a sensitizing amount of at least one cyanine dye defined above, e.g., cyanine dye containing a 1-phenylindole nucleus substituted in the 2-position with the 3-pyridyl group. The said cyanine dye is also covered. The dye useful in sensitizing the silver halide emulsion useful for fogged direct-positive films.
    Type: Grant
    Filed: June 26, 1987
    Date of Patent: June 13, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas D. Weaver
  • Connector apparatus for connecting a signal line with an external circuit
    Patent number: 4838814
    Abstract: A connector apparatus for making a connection between a signal line and an external circuit is disclosed which comprises a connector body having first and second pairs of terminals, each pair of terminals comprising a pair of contact pins, a first connector element having two terminals each attachable to and detachable from one end of each of the pair of contact pins of the first pair of terminals, the two terminals being connected to the signal line, a second connector element having two terminals each attachable to and detachable from one end of each of the pair of contact pins of the second pair of terminals, and terminating resistor connected between the two terminals in the second connector element, in which the other end of each contact pin of the first and second pairs of terminals is used as an external circuit connector terminal.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: June 13, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Nobuei Takai, Haruo Sakamoto, Kouzou Uekido, Michiaki Nishiyama
  • Herbicidal pyridine sulfonamides
    Patent number: 4838926
    Abstract: This invention relates to certain novel pyridine sulfonamide compounds, to composition containing such compounds, and to a method of use of such compositions to control the growth of undesired vegetation.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: June 13, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Mary A. Hanagan, Barry A. Wexler