Abstract: Mass-impregnated electrical cable, particularly for carrying high voltage direct current, having an insulation in which, around the insulating layer impregnated with an insulating fluid, a containing layer is provided broadly includes at least one winding of a tape of a semiconducting elastomeric material, which exerts an effective action of containing the insulating fluid, while preventing formation of micro-cavities within the impregnated insulating layer. The material constituting the tape has high physical-chemical resistance to the degrading action of the components of the insulating fluid, both in the cold state and, in particular, at the operating temperature of the cable.
Abstract: The present invention is directed to a method for forming graft copolymers from perfluoroolefins and perfluorovinyl ethers having fluorosulfonyl and fluorosulfonate functionality with selected polymers, and the uncrosslinked graft copolymers resulting therefrom.
Abstract: Aqueous dispersion polymerization of fluoromonomers is improved by using a combination of fluorosurfactants, one of which is a perfluoropolyether carboxylic acid or sulfonic acid or salt of either.
Type:
Grant
Filed:
November 2, 2000
Date of Patent:
May 28, 2002
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Richard Alan Morgan, Clay Woodward Jones, Theodore Treat, Jeffrey A. Hrivnak
Abstract: A catalyst comprising A) a stationary acid component selected from the group consisting of a perfluorinated ion exchange polymer on an inert support, a silane modified perfluorosulfonic acid, and a sulfated metal oxide; and B) a mobile acid component selected from the group consisting of chlorosulfonic acid, fluorosulfonic acid, a fluorinated monosulfonic acid, a fluorinated sulfonimide, a fluorinated disulfonic acid, and an adjunct acid mixture is disclosed.
Abstract: A winder for elastomeric fibers, which can reciprocate the fiber during winding and provides a substantially constant distance of fiber travel between the point where the fiber leaves the puller roll and the point where the fiber first contacts the contact roll, is provided.
Type:
Grant
Filed:
November 21, 2000
Date of Patent:
May 28, 2002
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Steven Andrew Cope, Joseph Edward Koskol
Abstract: A detachable attachment base for a BGA (Ball Grid Array), CGA (Column Grid Array), LGA (Land Grid Array), or flip-chip type integrated circuit is presented. The base comprises an electrically insulating elastic mat in which a large quantity of fine electrically conductive wires, placed at a short distance from one another, are incorporated. The elastic mat is held between the first electric component and the second electric component. The base also includes means for selectively pressing the second electric component against the electrically insulating elastic mat so as to establish an electric contact between the electric components over the elastic mat.
Abstract: A housing has a rotor receiving chamber with filament receiving bores lying in a plane normal to the rotor axis of rotation, a rotor being rotatably received in the chamber. The rotor and housing have complementary locking shoulders for axially locking the rotor in the chamber. The rotor has a pair of filament receiving bores aligned with the housing filament receiving bores. The rotor has an annular rib in the plane of the bores defining upper and lower rotor sections. The locking shoulders are in the lower section of the rotor and are located between the plane and the closed end of the chamber, at which end the rotor and housing have a complementary ratchet and pawl mechanism for allowing only one way rotation of the rotor relative to the housing for securing the filament to the rotor.
Abstract: A binder comprising a block polymer of blocks A and B and at least one of the blocks of C and D or E and F. The blocks are formed from:
A monocarboxylic acids having 15 to 50 carbon atoms,
B polyisocyanates having at least two isocyanate groups,
C polycarboxylic acids having at least two carboxyl and/or anhydride groups,
D polyisocyanates having at least two isocyanate groups,
E polyalcohols having at least two hydroxyl groups, and
F polyisocyanates having at least two isocyanate groups.
The composition of the block polymer has the following composition: (f+g)/h=0.5 to 1.0, i/(h−f−g)=2.0 to 25 and a/(c+e)=0.1 to 1.0, where a, c and e=total moles of A, C and E; f=total equivalents of hydroxyl groups, g=total equivalents of carboxyl and anhydride groups, h=total equivalents of isocyanate groups and I=total moles of A to F.
Type:
Grant
Filed:
October 26, 2000
Date of Patent:
May 21, 2002
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Wolfgang Schuelke, Rainer Krause, Diethard Winkler
Abstract: Disclosed herein are novel electrophoretic displays and materials useful in fabricating such displays. In particular, novel encapsulated displays are disclosed. Particles encapsulated therein are dispersed within a suspending, or electrophoretic, fluid. This fluid may be a mixture of two or more fluids or may be a single fluid. The displays may further comprise particles dispersed in a suspending fluid, wherein the particles contain a liquid. In either case, the suspending fluid may have a density or refractive index substantially matched to that of the particles dispersed therein. Finally, also disclosed herein are electro-osmotic displays. These displays comprise at least one capsule containing either a cellulosic or gel-like internal phase and a liquid phase, or containing two or more immiscible fluids. Application of electric fields to any of the electrophoretic displays described herein affects an optical property of the display.
Abstract: The subject-matter of the invention is a process for the preparation of o-(p-tolyl)benzonitrile, characterized in that an o-halobenzonitrile is treated with a p-tolylmagnesium halide in the presence of a manganous salt and of a cocatalyst comprising a transition metal.
Type:
Grant
Filed:
June 30, 1999
Date of Patent:
May 21, 2002
Assignee:
Sanofi-Stnth{dot over (e)}labo
Inventors:
Mouad Alami, Gérard Cahiez, Bertrand Castro, Eric Riguet
Abstract: A non-impact, thermal transfer printing sheet having a base sheet of fibrous paper or synthetic with or without a security device, coated with a composition comprising (1) lactone, spiropyrane coloration, or an iron metallic complexes that reacts with weak an organic acid to produce coloration when the sheet is heated via a thermal head, (2) an activator to accelerate the reaction, (3) absorbent materials to absorb the resulting products of the reaction, and (4) an inorganic phosphorescent ZnS:Cu pigment having a particle size sufficient to produce phosphorescence in a predetermined time and wave-length and a process of making thereof are disclosed. The sheet is capable of being printed using a thermal transfer printing head and providing phosphorescence when activated by ultraviolet light containing wavelengths of between 440 and 640 nm.
Abstract: A method for determining the optimal viewing angle of display, input, or output devices with limited viewing, output and/or sensing angle characteristics including a test pattern displayed on a display screen. Test pattern is displayed on display screen and includes one or more test elements having levels of gray different from the gray shown in background. Once initiated, viewer evaluates test pattern to determine if display screen is positioned at an optical viewing angle to the viewer. In particular, one set of test elements has a luminance just below background and the other set of test elements has a luminance just above background. To determine the optimal viewing angle, a viewer evaluates test pattern determine the difference in gray levels between test elements against background. The viewer then adjusts the position of display screen until test elements either blend in with background or provide the largest contrast with background.
Abstract: Within the known Müller-Kühne process and a corresponding installation, a utilization of a great variety of residual materials can be achieved with optimum process control, both in regard to the production of a raw powder and the fuel, whereby this is made possible in particular in that the raw powder components and the fuel components also are, with respect to the residual materials being used, stored separately, conditioned, and then mixed according to the formulation under strict monitoring. The flue gas is used for preheating the raw powder by adding the cold raw powder to it. This simultaneously removes sticky components from the flue gas. The raw powder preheated in this manner, and also the raw powder or dust recovered in subsequent dedusters are returned to the rotary drum kiln, whereby the solid and other fuels are used and burned with a mutually supportive flame at the opposite end of the rotary drum kiln.
Type:
Grant
Filed:
February 12, 1996
Date of Patent:
May 21, 2002
Assignee:
E. Schwenk Baustoffwerke KG
Inventors:
Hanno Reimann, Götz Reimann, Siegfried Meininger
Abstract: An encapsulated electrophoretic medium comprises a layer of capsules, each of these capsules comprising a liquid and at least one particle disposed within the liquid and capable of movement upon application of an electric field to the medium. A plurality of spacers are dispersed among the capsules. The medium can be formed by coating a mixture of capsules and spacers on a substrate, or by first coating the capsules and thereafter incorporating the spacers into the layer of capsules.
Abstract: The instant invention discloses utilization of a cDNA clone to construct sense and antisense genes for inhibition of starch synthase enzymatic activity in corn.
Type:
Grant
Filed:
June 30, 1999
Date of Patent:
May 21, 2002
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Karen E. Broglie, Jonathan Edward Lightner
Abstract: A system for keeping the imperfectly machined surfaces of bearings apart at rest. The system includes a first bearing surface which moves facing a second bearing surface, the first surface having a distribution of discrete diamond-like carbon (DLC) pads deposited upon an adhesion layer. The DLC pads are at a height which is approximately the height of the roughness or imperfections of the surfaces. The pads are distributed over the surface at approximately three pads to forty pads or more per square inch. The pads keep the bearing surfaces from coming in contact. Also disclosed is a hydrodynamic bearing having a thrust plate having hydrodynamic grooves and DLC pads on a thrust surface, and a rotor member having an end facing the thrust plate, and a ball and socket bearing having DLC pads deposited on either the socket surface or ball surface.
Type:
Application
Filed:
October 7, 1999
Publication date:
May 16, 2002
Applicant:
Schwegman Lundberg Woessner & Kluth P A Richard E Billion
Abstract: A black matrix, a preparation method thereof and a display device employing the black matrix. The black matrix which is a black coating layer surrounding pixels of the display device, includes SiO which is a dielectric material and at least one metal selected from the group consisting of iron (Fe), cobalt (Co), vanadium (V) and titanium (Ti). The black matrix has excellent thermal and chemical stability and is environmentally desirous by using a mixture of a nontoxic metal and a dielectric material. Also, the black matrix exhibits excellent adhesion to a substrate without an annealing process, is excellent in mechanical characteristic due to the absence of internal stress and is capable of being micro-patterned to have a particle size of 1 &mgr;m or less. When applied to the substrate of the display device, the black matrix exhibits excellent external light absorbing effect. Therefore, a display device having improved luminance and contrast characteristics can be attained.
Type:
Grant
Filed:
December 21, 2000
Date of Patent:
May 14, 2002
Assignees:
Samsung SDI Co., Ltd., Ivan Z. Indutnyy, Petro E. Shepelizvyi, Kateryna V. Michailoyskaya
Inventors:
Ivan Indutnyy Z., Petro Shepeliavyi E., Kateryna Michailovskaya V., Chang-won Park, Joon-bae Lee, Yong Han
Abstract: A good yield, high reaction rate process is disclosed for the production of perfluoro(alkyl vinyl ethers). The process involves elimination of halogen, preferably chlorine, from carbon atoms &agr; and &bgr; to an ether oxygen in an &agr;,&bgr;-dihaloperfluoro ether wherein the &agr;,&bgr;-dihaloperfluoro ether is allowed to react with zero valent zinc in a pyrrolidinone solvent. More particularly, the inventive process relates to high yield production of CF2═CFOCF2CF2SO2F from CF2ClCFClOCF2CF2SO2F wherein CF2ClCFClOCF2CF2SO2F is allowed to react with zero valent zinc in the presence of N-methyl-2-pyrrolidinone.
Abstract: The present invention relates to a method of making alpha-methylstyrene dimers by combining a cobalt catalyst, a free-radical initiator and an alpha-methylstyrene monomer, in an inert atmosphere, to form a mixture. The mixture is heated to a temperature in the range of 65° C. to 140° C. to form alpha methyl styrene dimers. The present invention also relates to the products produced by this inventive method.