Patents Assigned to E
  • Stable aqueous aluminum flake dispersion
    Patent number: 5104922
    Abstract: A stable waterborne high solids metallic flake pigment dispersion containing an aqueous carrier, film forming binder and metallic flake pigment and having a solids content of about 40-90% by weight; wherein the film forming polymer is a phosphated acrylic polymer neutralized with ammonia or a primary, secondary or tertiary amine and contains metallic flake pigments in a pigment to binder weight ratio of about 30/100-1000/100 and is non-reactive with the binder and the dispersion has a pH of about 7-9.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: April 14, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: David C. K. Chang
  • Triazinic compounds
    Patent number: 5104986
    Abstract: Triazinic compounds of general formula (I): ##STR1## obtained by the reaction of one mole of a halide of cyanuric acid with two oles of an amine, and following reaction of the so obtained intermediate with a polyamine.The compounds of general formula (I) find a use, in particular, as flame-retardant additives for polymers.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: April 14, 1992
    Assignee: Ministero Dell' Universita' e Della Ricerca Scientifica e Tecnologia
    Inventors: Roberto Cipolli, Enrico Masarati, Gilberto Nucida, Roberto Oriani
  • Vortex mixer drive
    Patent number: 5104231
    Abstract: An apparatus for providing linear motion in two opposed directions and circular motion in a first direction using a single drive motor.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: April 14, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles F. Collier, James D. Riall
  • Particle counting nucleic acid hybridization assays
    Patent number: 5104791
    Abstract: An improved nucleic acid hybridization assay, relying on particle counting, is provided. Presence and quantity of target nucleic acid is determined by detecting, upon hybridization, signals associated with particle aggregation or coincident signals from particles and reporters.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: April 14, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Scot D. Abbott, Richard C. Ebersole
  • Polyimide insulation with improved arc track resistance
    Patent number: 5104966
    Abstract: Novel polyimide based films are disclosed that are resistant to arc tracking and that include aromatic dianhydrides together with aromatic diamines and aliphatic diamines. The compositions contain from 5 to 20 percent by weight of the aliphatic diamine. These compositions maximize the thermal aging capability of the polyimide. The compositions are useful as films and laminates for wire and cable.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: April 14, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harris B. David
  • High-boiling hydrochlorofluorocarbon solvent blends
    Patent number: 5104564
    Abstract: A high-boiling hydrochlorofluorofluorocarbon (HCFC) solvent comprising a blend of for every 100 parts by weight of a hydrochlorofluorocarbon (e.g., 1,1,1-trifluorodichloroethane or 1,1-dichloro-1-fluoroethane) from about 25 to about 400 parts by weight of a selected organic solvent (e.g., dipropylene glycol monomethyl ether, dipropylene glycol monomethyl ether acetate, or mixture of dimethyladipate, dimethylglutarate, and dimethylsuccinate). Such solvents are useful in liquid/vapor phase cleaning applications even at elevated temperatures above the boiling temperature predicted by Raoult's law.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: April 14, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David S. Lermond, Kenneth T. Dishart, Abid N. Merchant
  • Substitute coal from acetylene production by-products
    Patent number: 5104417
    Abstract: A coal substitute product and process for producing it from by-products formed in the production of acetylene from natural gas is disclosed. The first by-product is an aqueous slurry of soot which is mixed with the second by-product, an acetylene polymer. After mixing the material is filtered to produce a filter cake which is processed into chunks similar to coal in appearance, handling qualities and burning characteristics. Alternatively another carbonaceous tarry substance such as an asphaltenes or acryloid polymer waste can be substituted for the acetylene polymer.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: April 14, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Samuel R. Alexander
  • Batts and articles of new polyester fiberfill
    Patent number: 5104725
    Abstract: Batts and filled articles of polyester fiberfill of round peripheral cross-section, but containing voids arranged peripherally around an axial void, and preferably seven such voids in a hexagonal packing arrangement.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: April 14, 1992
    Assignee: E. I. DuPont de Nemours and Company
    Inventor: Clarke R. Broaddus, deceased
  • Catalysis using blends of perfluorinated ion-exchange polymers with perfluorinated diluents
    Patent number: 5105047
    Abstract: Improved processes for acid-catalyzed oligomerization of olefins and alkylation of toluene are disclosed using a catalyst blend of at least one perfluorinated ion-exchange polymer containing sulfonic acid groups and at least one polymer diluent in a nonpolar reaction mixture.
    Type: Grant
    Filed: August 2, 1989
    Date of Patent: April 14, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Francis J. Waller
  • Sucker rod pump
    Patent number: 5104301
    Abstract: A subsurface well pump is provided which is resitant to vapor locking. The pump is a reciprocating sucker rod pump which has a top inlet valve which comprises one or more hinged flapper valves.
    Type: Grant
    Filed: February 27, 1991
    Date of Patent: April 14, 1992
    Assignee: Shell Western E&P Inc.
    Inventor: James R. Brewer
  • Coupled quantum-well electro-optical modulator
    Patent number: 5105301
    Abstract: A coupled quantum well electro-optical modulator, whose semiconductor structure is composed of one or of a plurality of successions formed by two layers capable of forming quantum wells, of a barrier layer which separates the two layers and of an intrinsic layer which separates the succession from other possible successions, where in presence of an electric field the absorption threshold of the light radiation shifts towards shorter wavelengths.
    Type: Grant
    Filed: December 14, 1989
    Date of Patent: April 14, 1992
    Assignee: CSELT - Centro Studi e Laboratori Telecommunicazioni S.p.A.
    Inventor: Domenico Campi
  • Thermoformed articles with improved ease of cutting and resistance to sticking
    Patent number: 5102943
    Abstract: Thermoformed trays prepared from a blend of 90 to 99.9 percent of polyethylene terephthalate resin, a small amount of sodium ion, and a small amount of wax exhibit effective crystallization rates and improved trimming and stacking properties.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: April 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Francis M. Logullo
  • Polymeric membranes
    Patent number: 5102600
    Abstract: Improved polymeric membranes and their method of manufacture are disclosed. The improved membranes are produced by increasing the draw ratio employed during the manufacture of the membrane. The membranes show at least substantially constant or increased selectivity and mechanical properties as the draw ratio is increased.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: April 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Okan M. Ekiner, George Vassilatos
  • Herbicidal pyridinesulfonylureas
    Patent number: 5102444
    Abstract: This invention relates to herbicidal pyridine-sulfonylureas which are highly active as preemergence and postemergence herbicides.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: April 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Paul H. Liang
  • Phosphonate substituted amino acids useful as antihypertensives
    Patent number: 5102875
    Abstract: Hypotensive activity is exhibited by new phosphonate substituted amino or imino acids of the formula ##STR1## isomeric mixtures thereof and pharmaceutically acceptable salts thereof, wherein:X is an imino or amino acid of the formula ##STR2##
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: April 7, 1992
    Assignee: E. R. Squibb & Sons, Inc.
    Inventor: Donald S. Karanewsky
  • Blue spectral sensitizers for non-tabular silver halide elements
    Patent number: 5102781
    Abstract: Zeromethine blue spectral sensitizing dyes have found utility in emulsions made without tabular grains. These emulsions are particularly useful for exposure to a light source rich in blue emission and are especially useful in radiographic elements designed for exposure to intensifying screens having such emission.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: April 7, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dietrich M. Fabricius, Raymond J. LeStrange
  • Dihydropyrimidine lactone derivatives
    Patent number: 5103006
    Abstract: Novel compounds of the formula ##STR1## wherein X is sulfur or oxygen, R.sub.2 is aryl or heterocyclo and R.sub.1 is as defined herein, are disclosed. Compounds of formula I possess calcium channel activating activity.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: April 7, 1992
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: George C. Rovnyak, Spencer D. Kimball
  • Device for identifying and sorting objects
    Patent number: 5101983
    Abstract: A device for identifying and sorting objects includes a low-friction surface for supporting parcels to be identified and sorted, each provided with a bar code on at least one side thereof, a dragging mechanism capable of conveying parcels from a staging area to a sorting area via a readout station which identifies each parcel by means of its bar code, and a plurality of trap doors, responsive to the readout station and located at predetermined positions on the low-friction surface, through which the identified parcels are selectively discharged and thereby routed to a corresponding plurality of intermediate or final destinations. The dragging mechanism comprises a pair of pulleys between which a flexible cable is operatively engaged which in turn pulls a plurality of drag arms over the low-friction surface.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: April 7, 1992
    Assignee: Meccanizzazione Postale E. Automazione S.p.A.
    Inventor: Mario Scata
  • Suture anchor and method of forming
    Patent number: 5102421
    Abstract: A suture anchor, or rivet, for fixing one end of a suture in a bone has a forward and formed of a plurality of truncated cones positioned in line behind a cone with a cylindrical member extending from the last truncated cone forming the rear end; a plurality of spiral grooves extend through the outer surfaces of the truncated cone and cone for spirally inserting the anchor, the spiral grooves forming serrations therebetween to prevent the suture anchor from being withdrawn from a bone into which it has been driven. An impact tool is used having a hole in the end to receive and engage the cylindrical member of the suture anchor.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: April 7, 1992
    Assignees: Wm. E. Anpach, III, Amy A. McGarrity, Thos. D. Anspach
    Inventor: William E. Anspach, Jr.
  • Method of gene mapping
    Patent number: 5102785
    Abstract: The method described characterizes each DNA segment to be mapped by cleaving it to produce DNA fragments which are then end labeled with a reporter(s) specific to the end nucleotides of each fragment. The labeled fragments are again cleaved to produce short fragments which are separated according to size. The short fragments are analyzed as to report identify and size which is indicative of the character of each fragment. By derivatizing the cleaved ends of the primary cleaved fragments, the labeling may be delayed until the second cleavage. Prior to the labeling the derivatized fragments, all underivatized fragments are removed, the derivatized fragments being immobilized.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: April 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kenneth J. Livak, Sydney Brenner