Patents Represented by Attorney James A. Costello
  • Patent number: 4063882
    Abstract: Concentrated storage-stable quaternary styryl dye solutions useful to dye paper, the solutions comprising, by weight,I. 20% to 40% of the dye ##STR1## wherein A is an anion, II. 30% TO 50% OF AT LEAST ONE OF ACETIC ACID AND PROPIONIC ACID,Iii. 10% to 40% of at least one acrylic acid and methacrylic acid, andIv. 3.3% to 4.5% of water.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: December 20, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Werner Douglas Steiner
  • Patent number: 4063880
    Abstract: An improved aqueous-organic solvent solution, having a pH between 10 and 13, of the disazo dye ##STR1## wherein X is a cation, preferably the sodium or lithium cation, having therein a combination ofI. 0.1% to 10%, by total weight, of a particular anionic surfactant, andIi. 0.1% to 10.0%, by total weight, of a particular nonionic surfactant.
    Type: Grant
    Filed: November 6, 1975
    Date of Patent: December 20, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Victor Tullio
  • Patent number: 4054560
    Abstract: Disperse monoazo dyes, useful for the dyeing and printing of polyester, polyamide and cellulose acetate fibers in navy-blue shades, having the formula ##STR1## wherein R.sub.1 is Br, Cl or CN; R.sub.2 is CN or NO.sub.2 ; is C.sub.2-4 --alkylene; and R.sub.4 is a selected aliphatic, cycloaliphatic, or aromatic radical.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: October 18, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Salvatore Anthony Bruno
  • Patent number: 4054422
    Abstract: Mannich condensation products useful in gasoline as carburetor detergents; the condensation compositions having the formula ##STR1## wherein Z is an alkyl - and hydroxy - substituted benzyl group wherein the alkyl has 20 to 1000 carbon atoms, n is 2 or 3; R is an alkyl of 1 to 20 carbon atoms; a, x and c are each 0 or 1; and b is 0 to 5; with the provisos that when a = 0, then b is at least 1 and c = 1; when a = 1 and x = 0, then b and c = 0; and when a = 1 and x = 1, then c = 1.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: October 18, 1977
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Bruce Hollis Garth
  • Patent number: 4043752
    Abstract: Dye solutions having excellent Kusters dye bath stability comprising, by weight,I. 10% to 20% of a dye of the formula ##STR1## wherein R is H or Cl, and X is a mixture of di- and tri-C.sub.1-4 alkanolammonium,Ii. 15% to 30% of n-butanol,Iii. 10% to 20% of ethyleneglycol,Iv. 10% to 20% of nonionic polyethylene oxide-polypropylene oxide copolymer surfactant,V. 5% to 10% of nonionic polyethoxylated aliphatic amine surfactant, andVi. 0 to 50% water.
    Type: Grant
    Filed: December 17, 1975
    Date of Patent: August 23, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lindsay Kilmurry, Howard Kirby Urion
  • Patent number: 4041115
    Abstract: A continuous process for preparing particulate microporous, open-celled polymer structures in a co-rotating twin-screw processor comprising agitating normally solid organic polymer and chlorofluorocarbon in the melt zone of said processor, cooling the resulting solution under agitation in the cooling and milling zone, extruding a snow-like mass from the cooling and milling zone, and then removing the chlorofluorocarbon from the snow-like mass to leave the polymer structures.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: August 9, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Francis Edward Jenkins, Daniel Gregory Tynan
  • Patent number: 4038044
    Abstract: A combination of diamine and higher polyamine Mannich condensation products useful in gasoline as carburetor detergents and useful also to control intake valve deposits and quick-heat intake manifold deposits; the diamine being ZNHC.sub.n H.sub.2n NHZ and the polyamine being ZNH(C.sub.x H.sub.2x N(R')).sub.y --C.sub.x H.sub.2x NHZ wherein Z is an alkyl- and hydroxy-substituted benzyl, the alkyl having 50 to 1000 carbon atoms; R' is hydrogen or Z with the proviso that at least one R' is hydrogen; n is 2 to 6; x is 2 or 3; and y is 1 to 5.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: July 26, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Bruce Hollis Garth
  • Patent number: 4038043
    Abstract: A combination of monoamine and polyamine Mannich condensation products, useful in gasoline as carburetor detergents and useful also to control intake valve deposits and quick-heat intake manifold deposits; the monoamide being Z.sub.n NR.sub.3.sub.-n, and the polyamine being: ZNH(C.sub.x H.sub.2x N(R')).sub.y C.sub.x H.sub.2x NHZ wherein Z is an alkyl- and hydroxy-substituted benzyl group, the alkyl having 50 to 1000 carbon atoms; R is hydrogen or alkyl of 1 to 18 carbon atoms; n is 1 or 2; R' is hydrogen or Z with the proviso that at least one R' is hydrogen; x is 2 or 3; and y is 1 to 5.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: July 26, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Bruce Hollis Garth
  • Patent number: 4035396
    Abstract: A solution of alkylbenzoylbenzoic acid in a solvent that resists sulfonation is contacted at or below about 95.degree. C with oleum to effect ring closure. The product alkylanthraquinone is obtained in solution from which the alkylanthraquinone can be isolated.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: July 12, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James Milano
  • Patent number: 4029585
    Abstract: Dry soil resistance and nonflame propagating characteristics are insured in textile fibers by applying thereto an aqueous dispersion containing a perfluoroalkyl ester of a carboxylic acid of from 3 to 30 carbon atoms. After the dispersion is applied, the fibers are dried at between 120.degree. to 170.degree. C.
    Type: Grant
    Filed: August 7, 1975
    Date of Patent: June 14, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert Harold Dettre, Edward James Greenwood
  • Patent number: 4029480
    Abstract: Electrically conductive hydrocarbon fuel compositions containing from 0.01 to 40 ppm of an antistatic polysulfone copolymer additive consisting essentially of units derived from sulfur dioxide, C.sub.6.sub.-24 1-alkene and, optionally, an olefin of the formula ##STR1## wherein A is a group having the formula, --(C.sub.x H.sub.2x)--COOH, where x is from 0 to 17, and B is hydrogen or carboxyl; and a process for preparing same.
    Type: Grant
    Filed: August 5, 1975
    Date of Patent: June 14, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas E. Johnston
  • Patent number: 4028276
    Abstract: Pressure-sensitive compositions adaptable for use as elastic resistors over a wide pressure range, useful as keyboard switches or vehicle-crash sensors, comprising hard, metallic-conductive particles insulatively distributed in elastomer.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: June 7, 1977
    Assignee: E. I. Du Pont de Nemours & Company
    Inventors: John Charles Harden, Sebastian V. R. Mastrangelo
  • Patent number: 4014646
    Abstract: Improved concentrated dye solutions comprising anionic monosulfonated anthraquinone dye, the cations including alkanolammonium cations, in a mixed solvent of water and an inert organic cosolvent, the improvement comprising the addition thereto of about 0.03 to 0.20 part by weight, per part of dye of ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, or N-hydroxyethylethylenediaminetriacetic acid, said dye solution containing no more than about 0.2 percent, based on total solution weight, of cations other than alkanolammonium cations.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: March 29, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Victor Tullio
  • Patent number: 4014799
    Abstract: A relatively small amount of a volatile compound which is completely vaporized when applied to a fire and has a heat of combustion between about 8 to 13.5 kilocalories per gram is combined with bromotrifluoromethane for use in extinguishing fires of materials having heats of combustion between about 2.5 to 5 kilocalories per gram.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: March 29, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert J. Owens
  • Patent number: 4013634
    Abstract: Water-soluble polyazo direct dyes for paper and other cellulosics having the formula ##SPC1##Wherein:R is selected from unsubstituted phenyl, unsubstituted naphthyl, phenyl substituted with up to 3 substituents and naphthyl substituted with up to 3 substituents, said substituents selected from the group methyl, ethyl, methoxy, ethoxy, sulfonic acid, benzothiazolyl, and chlorotrimethylammonium acetyl, andX, y and Z are substituted so as to give derivatives of at least one of 1-amino-8-naphthol-4,6-disulfonic acid, 1-amino-8-naphthol-3,6-disulfonic acid, and 1-amino-8-naphthol-4-sulfonic acid.
    Type: Grant
    Filed: February 21, 1974
    Date of Patent: March 22, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harvey Irvin Stryker
  • Patent number: 4011057
    Abstract: An improved antioxidant composition comprising hindered phenol antioxidant wherein the improvement comprises, in combination with the hindered phenol, from about 1% to 10%, by total weight, of at least one amino compound having a pKb of from 0.3 to 8.0.
    Type: Grant
    Filed: April 16, 1974
    Date of Patent: March 8, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Alvin Sayers
  • Patent number: 4010358
    Abstract: An improved process and apparatus for measuring fuel octane numbers in a knock test engine of a multiplicity of fuels, using at least one fuel of known octane number as a reference, wherein fuel feed means, memory means, and calculating means cooperate so that the fuel feed means selects the fuel source and the fuel feed-rate for that fuel source, the memory means receives the knock intensity values generated in the test engine and the corresponding fuel feed-rate settings, the calculating means (a) determines the approximate feed-rate setting that corresponds to the maximum knock intensity, (b) provides a series of feed-rate settings bracketing said approximate feed-rate setting and generates a corresponding set of knock intensity values, (c) determines the refined feed-rate setting that corresponds to maximum knock intensity, (d) sends said setting to the memory means for storage, and (e) from the knock intensities that are generated during subsequent comparison of the fuels of known and unknown octane numb
    Type: Grant
    Filed: June 19, 1975
    Date of Patent: March 1, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William Emery Morris
  • Patent number: 4002424
    Abstract: Solution of a mixture of isomers of naphthylazophenylazonaphthyl dye containing two sulfonate substituents, the solution comprising said dye, water, triethanolamine, lithium base and urea. The dyes have good solubility and substantivity and are useful among other things, for dyeing cellulosic substrates.
    Type: Grant
    Filed: June 14, 1973
    Date of Patent: January 11, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Sanford Byrom Smith
  • Patent number: 3987022
    Abstract: Biscationic disazo dyes having good exhaust and buildup on acid-modified BCF nylon fibers as well as good lightfastness and wetfastness on such fibers; and a process for dyeing nylon therewith at a pH of about 4 to 7. The dyes have the formula: ##SPC1##WhereinX is selected from --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --NH--, --O--, --OCH.sub.2 (CH.sub.2).sub.1.sub.-2 O--, --OCH.sub.2 CH(OH)CH.sub.2 O--, --SO.sub.2 --, --S--, --S--S--, --NHCO--, and --NHCONH--;R.sub.1 is selected from H, CH.sub.3, C.sub.2 H.sub.5, Cl, and Br;R.sub.2 is selected from H, alkyl, alkoxy, Cl, NHCO-alkyl, and NHCOC.sub.6 H.sub.5 ;R.sub.3 is selected from H, alkyl, and alkoxy;Y.sup.+ is selected from ##EQU1## whereinn is 0 or 1;Z is H when n is 0 and Z is OH when n is 1;Q.sup.+ is selected from NR.sub.4 R.sub.5 R.sub.6, and NHCOCH.sub.2 NR.sub.4 R.sub.5 R.sub.6 ;R.sub.4 and R.sub.5 together with the nitrogen atom form a piperidinium pyrrolidinium, or morpholinium ring, or, together with R.sub.6, form a pyridinium ring;R.sub.
    Type: Grant
    Filed: February 25, 1975
    Date of Patent: October 19, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Daniel Shaw James
  • Patent number: 3973903
    Abstract: A process for making yellow, basic azomethine dyes for paper, leather and textiles, and concentrated, stable solutions thereof; the process being an improvement in the process of reacting an azo dye base precursor of the formula ##SPC1##Wherein A is phenyl or substituted phenyl, with dimethyl sulfate in solution, and in the presence of an acid-binding agent,THE IMPROVEMENT COMPRISING EMPLOYING AN AQUEOUS SOLUTION HAVING AT LEAST 30 WEIGHT PERCENT WATER, EMPLOYING DIMETHYL SULFATE IN A MOLAR EXCESS OF FROM 100% TO 300%, AND EMPLOYING FROM 2.0 TO 3.5 MOLES OF MAGNESIUM OXIDE AS THE ACID-BINDING AGENT PER MOLE OF PRECURSOR.
    Type: Grant
    Filed: March 5, 1974
    Date of Patent: August 10, 1976
    Assignee: E. I. Du Pont de Nemours and Co.
    Inventor: Ray Allen Clarke