Patents Assigned to E
  • Method and apparatus for controlling the carriage of a linear motor
    Patent number: 4922142
    Abstract: The method and apparatus for controlling the travel of a carriage of a linear motor along the motor primary by providing a wedge shaped member adjacent the entrance or exit of the electromagnetic field of the primary.
    Type: Grant
    Filed: June 22, 1988
    Date of Patent: May 1, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Paul W. Givler, Jr., William J. Hommes, Cobern V. Peterson, Madison A. Culver
  • Herbicidal sulfonamides
    Patent number: 4921527
    Abstract: The invention relates to sulfonylurea compounds with a substituted or unsubstituted bicyclic nine-membered ring having one to five heteroatoms which are preemergent and/or postemergent herbicides or plant growth regulants.
    Type: Grant
    Filed: May 4, 1988
    Date of Patent: May 1, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Chi-Ping Tseng
  • Blend of cotton, nylon and heat-resistant fibers
    Patent number: 4920000
    Abstract: Heat resistant, durable woven fabrics are prepared with warp yarns comprising certain blends of cotton, nylon and heat resistant fibers.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: April 24, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James R. Green
  • Oriented polymeric tape preparation
    Patent number: 4919875
    Abstract: A process for the preparation of oriented polymeric tape of a blend of copolyetherester and polyethylene terephthalate, by blending the components at a temperature above the higher crystalline melting point of the two polymeric components for a minimum melt residence time.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: April 24, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Teh-Chuan Wang
  • Di-tridecyl sebacate tire yarn finish
    Patent number: 4920003
    Abstract: A fiber finish especially suitable for tire yarns having 50-95% lubricants with at least 40% of the lubricants comprising ditridecyl sebacate and the yarns containing the finish are disclosed.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: April 24, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Fleming H. Day
  • Apparatus for remotely controlled movement through tubular conduit
    Patent number: 4919223
    Abstract: Apparatus for remotely controlled movement through linear and curved sections of a pipe, or other tubular conduit. The apparatus includes a pair of members spaced apart along a common, central axis. Each member carries a plurality of extensible and retractable pneumatic cylinders for movement of frictional engagement elements into and out of engagement with the interior wall of the pipe. One or more axial drive cylinders rigidly connect the spaced members for movement thereof toward and away from one another. The apparatus carries equipment for inspecting, measuring and/or performing other operations on the pipe, and is of simple and economical design, requiring no gimbal joints or other special linkages for movement in the intended manner.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: April 24, 1990
    Assignee: Shawn E. Egger
    Inventors: Shawn E. Egger, Harold G. Sherman
  • Round cable having a corrugated septum
    Patent number: 4920234
    Abstract: A cable structure in round or flat form is characterized by a corrugated septum disposed intermediate an inner and an outer sheath. The septum contacts the sheaths to define tubular envelopes extending axially along the length of the cable. Each of the envelopes is able to receive a predetermined number of conductors. The sheaths and the septum are electrically connectable to a ground potential so as to totally electromagnetically isolate the conductors entirely along their axial lengths.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: April 24, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Timothy A. Lemke
  • Apparatus for and process of treating shrinkable fibers
    Patent number: 4919869
    Abstract: A process for diffusing and subliming water-soluble and water-insoluble materials into never-dried, shrinkable aromatic polyamide fibers, using steam heated at certain controlled temperatures, within a specially designed treatment chamber and a process and apparatus for treating a tow of shrinkable material.
    Type: Grant
    Filed: March 22, 1989
    Date of Patent: April 24, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Tony D. Zatkulak, David J. Rodini, James D. Hodge
  • Process for metering color concentrates to thermoplastic polymer melts
    Patent number: 4919872
    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: February 16, 1989
    Date of Patent: April 24, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William A. Fintel
  • Process for preparing a nylon fiber with reduced spherulites
    Patent number: 4919874
    Abstract: A process for preparing a nylon 66/6 copolymer fiber with reduced spherulites comprising adding 1-6% caprolactam and 0.001-2% water-soluble inorganic calcium salt to 94-99% nylon 66 salt to form a nylon 66/6 salt solution, polymerizing the salt solution to form a polymer, and extruding the polymer.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: April 24, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: William T. Windley
  • Point-bonded jet-softened polyethylene film-fibril sheet
    Patent number: 4920001
    Abstract: Point-bonding and water-jet-softening of a sheet of flash-spun polyethylene plexifilamentary film-fibril strands provide a nonwoven fabric that is particularly suited for dyeing and use in disposable protective garments. Garments made with the nonwoven fabric are comfortable and provide a good protection against particulate matter, such as air-borne asbestos particles.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: April 24, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Chi-Chang Lee, Penny C. Simpson
  • Cut and abrasion resistant spun yarns and fabrics
    Patent number: 4918912
    Abstract: Spun yarns and fabrics having a high level of both abrasion and cut-resistance are disclosed. Such yarns are made from a blend of about 40-60 percent para-aramid fiber, about 20-40 percent nylon fiber, and about 10-30 percent acrylic fiber. The yarns and fabrics are particularly useful in making articles of clothing such as socks.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: April 24, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Grant H. Warner
  • Expert system with natural-language rule updating
    Patent number: 4920499
    Abstract: An expert system for process control, which permits the inference rules to be revised at any time without requiring the specialized skills of a "knowledge engineer". The inference rules are intitially defined by a domain expert who fills in blank fields in a set of highly constrained substantially natural-language templates. The rule set thus specified is automatically translated to define an operational expert system. Updating can be performed by a domain expert at any time: the set of templates with the data fields as originally entered is redisplayed, so that the domain expert can edit the accessible fields and then command the modified rule set to be automatically translated, to define a modified operational expert system.
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: April 24, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard D. Skeirik
  • Thiazole derivatives
    Patent number: 4919706
    Abstract: Certain N-[(heterocyclic)aminocarbonyl]thiazolesulfonamides, such as N-[(4-methoxy-6-methylpyrimidin-2-yl)aminocarbonyl]-4-thiazolesulfonamide, are useful as herbicides and/or plant growth regulants.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: April 24, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James V. Hay, Anthony D. Wolf
  • Vehicle wheel
    Patent number: 4919490
    Abstract: A wheel formed of a rim joined to a hub by a multi-spoke foam structure that is coated with a fiber reinforced resin material is defined by particular relationships between the spokes and the radiused sections joining the spokes to the hub and the rim.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: April 24, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Mark W. Hopkins, Frank S. Principe
  • Accelerated cure of thermoplastic compositions
    Patent number: 4920177
    Abstract: A process for accelerating the cure rate of a thermoplastic composition comprising blending 5-95 parts by weight of a crystalline polyolefin resin of a substantially saturated homopolymer or copolymer of a C.sub.2 -C.sub.8 alpha monoolefin and 5-95 parts by weight of a crosslinkable ethylene-containing terpolymer comprising ethylene, an alkyl acrylate or alkyl methacrylate wherein the alkyl group contains 1-6 carbon atoms or a vinyl ester of a monocarboxylic acid having 2-6 carbon atoms, and glycidyl acrylate or glycidyl methacrylate, and mixing and shearing the composition while crosslinking the ethylene-containing terpolymer with a crosslinking agent that is a combination of (a) from about 1.5-9 parts by weight per 100 parts ethylene-containing terpolymer of an organic aliphatic or aromatic polycarboxylic acid or anhydride thereof containing 3-8 carbon atoms and (b) from about 0.
    Type: Grant
    Filed: June 20, 1989
    Date of Patent: April 24, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Daniel E. George
  • Analysis device
    Patent number: 4917865
    Abstract: A centrifugal analysis device in which film capillaries communicate with peripheral cells, with a hydrophilic capillary providing the cell inlet and a hydrophobic capillary providing the cell outlet.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: April 17, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William A. Romanauskas
  • Pharmaceutical compositions for the prophylaxis and therapy of calculosis of biliary tract and of biliary dyspepsia
    Patent number: 4917898
    Abstract: Pharmaceutical compositions for the prophylaxis and therapy of biliary tract calculosis and of biliary dyspepsia, containing as the active principle taurohyodeoxycholic acid, are herein described.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: April 17, 1990
    Assignee: Pharmaricherche Di Allesandra Tonozzi e C. s.a.s.
    Inventors: Mario Angelico, Simos Contos
  • Waveguide structure using potassium titanyl phosphate
    Patent number: 4917451
    Abstract: An electro-optic waveguide structure having a single mode channeled waveguide pattern of the Mach-Zehnder configuration is formed in a substrate of potassium titanyl phosphate.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: April 17, 1990
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Michael P. Chouinard, Edward P. Gargiulo, James L. Hohman, Jr., Daniel B. Laubacher, Jiunn-Yau Liou, Moshe Oren
  • Combined clip and mounting stud
    Patent number: D307541
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: May 1, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Paul A. Tres