Patents Assigned to E
  • Patent number: 4293674
    Abstract: Compound of the formula CH.sub.2 .dbd.C(CH.sub.3)CO.sub.2 R wherein R is an alkadienyl or cycloalkadienyl group which contains the 1,3- or 1,4-diene carbon skeleton, homopolymers and copolymers of the compound, and curable finishes containing the homopolymer and/or copolymer.
    Type: Grant
    Filed: June 3, 1980
    Date of Patent: October 6, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gerald D. Andrews
  • Patent number: 4293473
    Abstract: Solid adhesive compositions consisting essentially of polyvinyl alcohol or ethylene/vinyl alcohol copolymer, and at least two component crystalline solvent system (such as urea and .epsilon.-caprolactam), ethylene polymer and optionally thermoplastic tackifier and carboxylic acid are disclosed. Outstanding adhesive properties with cellulosics, spun bonded polyolefins, aluminum foil and polyester film substrates have been obtained.
    Type: Grant
    Filed: July 25, 1980
    Date of Patent: October 6, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ernest F. Eastman
  • Patent number: 4292437
    Abstract: Preparation of isobutyric acid and esters by carbonylation of propylene in the presence of water or an alcohol, a palladium catalyst and ortho-substituted triarylphosphine.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: September 29, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Edward N. Squire, Francis J. Waller
  • Patent number: 4292394
    Abstract: Process for preparation of multicolor images on a single negative-working photosensitive layer which comprises imagewise exposing the layer through a transparency to form tacky image areas; toning the tacky image areas with a toner which becomes swollen or solubilized upon contact with the tacky areas; buffing or rubbing the toned image areas until glossy; and repeating the exposing, toning and buffing or rubbing using a different image-bearing transparency and appropriate toner. The process is useful in preparing multicolor proofs, e.g., maps, textile and wall covering design proofs and samples, etc.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: September 29, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Victor F. H. Chu, James Riesenfeld
  • Patent number: 4292120
    Abstract: A process of forming an image of toner on a latent magnetic image in a magnetic imaging member followed by transfer to a heated transfer member. The transfer member is formed of a backing sheet coated with polyvinyl alcohol. The toner image is then transferred to a substrate using heat and pressure. The backing sheet portion of the transfer member is then stripped away and the polyvinyl alcohol is washed away with water. The surface portion of the substrate not protected by the transferred resist toner image is then permanently modified by etching or plating. Chemically milled shapes are prepared as well as printed circuits and printing plates. The printed circuits may be formed by (1) etching away areas of a metal surface not protected by the resist, (2) electroless plating on areas not protected by the resist or (3) electroplating areas of a metal surface not protected by the resist, removing the resist, and in the case of (2) and (3), etching away the metal previously covered by the resist.
    Type: Grant
    Filed: April 10, 1980
    Date of Patent: September 29, 1981
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: George R. Nacci
  • Patent number: 4292391
    Abstract: Pyrazolo [3,4-d] pyrimidine, and derivatives thereof, can be added to either a silver halide emulsion, or to a hydroquinone (litho) developer to accelerate development and reduce the induction period.
    Type: Grant
    Filed: February 6, 1980
    Date of Patent: September 29, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Joseph D. Overman
  • Patent number: 4291704
    Abstract: A spirometer device includes an open ended inflatable elastomeric vessel with calibrated indicia along its length for indicating the volume of gas contained in the vessel and a mouth piece consisting of two relatively rotatable sections, one of said sections being connected to the open end of the vessel so that air can be blown through the mouth piece to inflate the vessel. The mouth piece contains a unique valving system and an air actuated sound generating device so that depending upon the relative angular relationship of the two sections, air can be blown into the vessel and retained in the vessel or allowed to escape from the vessel either through the sound generating device or not.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: September 29, 1981
    Assignee: Dale E. Braddy
    Inventors: Thomas L. Petty, Balinderjeet S. Baidwan
  • Patent number: 4292449
    Abstract: The reaction of a polyfluorocarbonyl compound such as a polyfluoroketone or polyfluorocarboxylic acid fluoride with fluoride ion and a polyfluoroallyl chloride, bromide or fluorosulfate produces a polyfluoroallyloxy compound, e.g., CF.sub.2 .dbd.CFCF.sub.2 OCF.sub.2 CF.sub.3. The polyfluoroallyloxy compounds copolymerize with ethylenically unsaturated monomers such as tetrafluoroethylene, chlorotrifluoroethylene or vinylidene fluoride to form polymers which are moldable, and in some cases electrically conducting or are water-wettable and dyeable.
    Type: Grant
    Filed: May 1, 1980
    Date of Patent: September 29, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Carl G. Krespan
  • Patent number: 4292372
    Abstract: Polyvinylbutyral sheeting, plasticized with a hydrolyzable ester, having low acid concentration through the use of formic acid salt as an adhesion control agent.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: September 29, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert E. Moynihan
  • Patent number: 4290417
    Abstract: A solar heating system in which the heating transfer medium is circulated from the heat absorbing member through the heat exchange area by means of gravitational forces which are augmented by the use of a transfer medium containing additives which change in state from fluid to gaseous as they move through the system. An emulsifying agent is also employed within the circulating fluid to prevent agglomeration of the additives. The use of one or more additives within the circulating fluid depending upon ambient conditions is disclosed.
    Type: Grant
    Filed: July 18, 1979
    Date of Patent: September 22, 1981
    Assignees: Walter Todd Peters, Margot E. Peters, Albert F. Kronman
    Inventors: Melville F. Peters, Walter T. Peters
  • Patent number: 4290224
    Abstract: A toy having combined rotational motion about a horizontal axis and translational motion in a vertical direction. Two parallel discs are connected through their centers by a single axle. One end of a torsion resistant tape is attached to the axle, at a position between the two discs. A swivel system is attached to the other end of the tape, and a ring for holding the toy is attached to the swivel system. In order to operate the toy, the user's finger is placed in the ring and an up-and-down motion is initiated. The balance of the toy during operation is facilitated by the support provided to the axle along the width of the tape.
    Type: Grant
    Filed: April 9, 1980
    Date of Patent: September 22, 1981
    Assignees: Ramon E. Bisque, Franklin J. Stermole
    Inventor: Patrick MacCarthy
  • Patent number: 4290456
    Abstract: An improved thermoplastic pipe stub end for welding to thermoplastic pipe is disclosed. The stub end has a flange portion integrally joined to a neck portion which has inner and outer surfaces and terminates at a welding face. The improvement resides in the reduction of the length of neck portion such that it extends from the flange a distance in millimeters of not greater than 1.5 .sqroot.O.D., where O.D. is the outer diameter in centimeters of the neck portion at the welding face. The improved stub end permits higher strength heat welds to be made by butt fusion between the thermoplastic stub end and a thermoplastic pipe to be joined thereto.
    Type: Grant
    Filed: July 13, 1977
    Date of Patent: September 22, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harold Ahrbeck
  • Patent number: 4291115
    Abstract: Photopolymerizable compositions containing(1) a polymer having a plurality of salt-forming groups,(2) an ethylenically unsaturated compound having at least one complementary salt-forming group,(3) an ethylenically unsaturated diester polyhydroxy polyether of the formula ##STR1## where R is H or CH.sub.3 ; R.sup.1 is H or an alkyl group of 1-4 carbon atoms; n is 1-15; p is 0 or 1; and when p is 1, R.sup.2 is H or CH.sub.3, and R.sup.3 is H, CH.sub.3 or C.sub.2 H.sub.5 ; and(4) a radiation-sensitive, free-radical generating systemprovide photopolymerizable elements which have outstanding photospeeds and are relatively insensitive to oxygen.
    Type: Grant
    Filed: September 17, 1980
    Date of Patent: September 22, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William J. Chambers
  • Patent number: 4291082
    Abstract: A breathable fabric which comprises a structure woven from thermoplastic polymeric tapes, wherein the woven structure is coated with a foamed permeable coating. The tapes are preferably made from polyethylene having a density between 0.940 and 0.970 g/cm.sup.3. The coating is preferably a lace coating made from polyethylene having a density between 0.910 and 0.940 g/cm.sup.3. The fabric is useful for making breathable sacks.
    Type: Grant
    Filed: November 14, 1979
    Date of Patent: September 22, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Alan D. Stall
  • Patent number: 4290228
    Abstract: Several types of toy vehicles are provided which automatically lean when negotiating turns. One such vehicle is a radio-controlled toy motorcycle, which carries two outriggers with supports that extend downward from the typical positions of a rider's feet. Each outrigger pivots about two independent axes, to bank the toy for negotiating turns. The outriggers are cam-operated from the same radio-controlled steering mechanism which operates the front fork of the toy to turn it. An articulated toy rider has arms which follow the handlebar motions, and legs which follow the outrigger supports--to suggest the illusion that the rider is supporting the motorcycle with his foot on turns. The radio receiver and control electronics, as well as electric motors to drive the rear wheel and the steering mechanism, are powered by dry cells advantageously mounted in the mufflers.
    Type: Grant
    Filed: February 13, 1980
    Date of Patent: September 22, 1981
    Assignee: Adolph E. Goldfarb
    Inventors: Adolph E. Goldfarb, Delmar K. Everitt
  • Patent number: 4291040
    Abstract: This invention is directed to compounds of the formulas ##STR1## and various intermediates therefore. The final products possess useful hypotensive activity.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: September 22, 1981
    Assignee: E. R. Squibb & Sons, Inc.
    Inventor: John Krapcho
  • Patent number: 4291054
    Abstract: 4-Oxo-2,5-cyclohexadien-1-ylideneaminooxy derivatives, such as N-[[[N-[[N-[3,5-bis(1,1-dimethylethyl)-4-oxo-2,5-cyclohexadien-1-ylidenami nooxycarbonyl]-N-methylaminothio]]-N-methylaminocarbonyloxy]]]ethanimidothi oic acid, methyl ester, useful for control of insects.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: September 22, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jiin-Duey Cheng
  • Patent number: 4289564
    Abstract: Stranding apparatus for fabricating open-weave structures includes a base frame supporting a pair of spaced apart plates, both of which plates includes a plurality of movable pins on which resin impregnated, continuous filament strands are placed. The pins retract into the plates after the resin has cured to allow the stranded product to be removed from the frame. The apparatus rotates about a central axis to provide a plurality of stations at which a specific process or step is accomplished.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: September 15, 1981
    Assignee: Arthur E. Thomson
    Inventors: Donald E. Hanaford, Dale R. Oldham
  • Patent number: 4289143
    Abstract: In order to determine the acoustic impedance of a human ear at various static pressures, a probe tightly fitted to the pinna of the ear transmits a short acoustic pulse with a wide frequency spectrum (such as white noise) from an electroacoustic transducer to the ear canal and receives back an acoustic response signal which a microphone converts into an electrical wave. The latter is digitized and transformed into terms of a Fourier series fed to a processor which, on the basis of similar terms stored in a memory and previously obtained with the same probe fitted to two different cylindrical calibrating cavities, derives therefrom the acoustic ear impedance at a particular air pressure. The processor also triggers an electric pulse generator, working into the electroacoustic transducer, and may progressively adjust a generator of static air pressure connected to the probe.
    Type: Grant
    Filed: January 9, 1980
    Date of Patent: September 15, 1981
    Assignee: CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.
    Inventors: Franco Canavesio, Rodolfo Ceruti
  • Patent number: RE30754
    Abstract: Process for the preparation of thermoplastic graft copolymers which comprises heating for about 15 seconds to 60 minutes, with mixing, a trunk copolymer of at least two monomers, at least one of said monomers providing amine-reactive sites taken from the group consisting of the anhydride group, e.g., maleic anhydride; a vicinal pair of carboxylic groups and a carboxylic acid adjacent to an alkoxycarbonyl group, wherein the alkoxy group contains up to 20 carbon atoms, and at least one of said monomers containing no amine-reactive sites, and at least one side chain polymer having per chain one active amine site taken from the group consisting of primary and secondary amines, the remainder of said side chain polymer being substantially unreactive with the reactive sites, e.g., amino-substituted polycaprolactam, polylaurolactam, polyethylene oxide, etc., of the trunk copolymer. The process provides control of the type and length of the side chain polymer grafted onto the trunk copolymer.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: September 29, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Clarence F. Hammer, Harold K. Sinclair