Patents Examined by D. Horwitz
  • Patent number: 3944575
    Abstract: Tetranitro aryl ether compounds are prepared by aromatic nucleophilic substitution of various aryl diols with 4-fluoro-1,2-dinitrobenzene. By reducing the nitro moieties of the tetranitro compounds, tetraamino aryl ether compounds are obtained. These latter compounds are useful as monomers in preparing thermally stable polymers having good solubility parameters.
    Type: Grant
    Filed: May 30, 1974
    Date of Patent: March 16, 1976
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Frank W. Villaescusa, John G. Breland, Fred E. Arnold
  • Patent number: 3941844
    Abstract: N-alkylated arylamines are prepared by reaction of arylamines which have at least one hydrogen atom on the nitrogen, with olefins or cycloolefins which can have substituents which are inert under the reaction conditions, at temperatures from 180.degree. to 450.degree.C, in the presence of catalysts. The improvement is that silicic acid which contains from 0.1 to 30 percent by weight of phosphoric acids, based on silicic acid, is used as the catalysts and that catalytic amounts of water are employed. N-alkylated arylamines are starting materials for the manufacture of dyes, pesticides, plant protection agents and growth regulators, and can also be used as mineral oil additives.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: March 2, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Joachim Szymanski, Toni Dockner
  • Patent number: 3941843
    Abstract: Dark colored impurities, 2-aminonaphthalene and 2-naphthol are extracted from crude N,N'-di-2-naphthyl-p-phenylenediamine by contacting with a mixed solvent system comprising (A) at least one compound selected from the group consisting of alkanols and alkanediols and (B) at least one alkylated benzene.
    Type: Grant
    Filed: May 16, 1974
    Date of Patent: March 2, 1976
    Assignee: The B. F. Goodrich Company
    Inventors: George Kletecka, Mark E. Forry
  • Patent number: 3939218
    Abstract: 1,1-Diphenylalkanes having a p-tert-butyl and a p'-alkyl group substituted thereon are a new class of compounds possessing a broad range of insecticidal activity.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: February 17, 1976
    Assignee: Mobil Oil Corporation
    Inventor: Jerry G. Strong
  • Patent number: 3936508
    Abstract: A process for producing chloroprene from 3,4-dichlorobutene-1 and sodium hydroxide solution wherein a dehydrated mixture of n-butanol and aqueous sodium hydroxide solution is reacted with 3,4-dichlorobutene-1 to form chloroprene and solid sodium chloride.
    Type: Grant
    Filed: February 27, 1974
    Date of Patent: February 3, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rupert Wenzel, Gerhard Scharfe
  • Patent number: 3936504
    Abstract: 2-Nitroindane-1,3-dione derivatives are useful in the prophylaxis and treatment of asthma, hay fever and also in the treatment of rhinitis.
    Type: Grant
    Filed: December 21, 1972
    Date of Patent: February 3, 1976
    Assignee: Beecham Group Limited
    Inventors: Derek Richard Buckle, Harry Smith
  • Patent number: 3935239
    Abstract: A process for producing .alpha.-diketones which comprises oxidizing diaryl-substituted acetylenes with potassium permanganate in an aqueous acetone solution preferably in the presence of acetic acid.
    Type: Grant
    Filed: March 15, 1974
    Date of Patent: January 27, 1976
    Inventors: Oyar Yanovich Neiland, Yana Nikolaevna Kreitsberga
  • Patent number: 3935287
    Abstract: The tendency for methyl chloroform to decompose in the presence of metals, particularly aluminum, is inhibited by a stabilizer mixture comprising an epoxide, a nitroalkane, trioxane and either propylene glycol mono-methyl ether, dioxepane or a mixture thereof.
    Type: Grant
    Filed: October 25, 1974
    Date of Patent: January 27, 1976
    Assignee: Diamond Shamrock Corporation
    Inventors: Norman L. Beckers, Edward A. Rowe
  • Patent number: 3935286
    Abstract: A process for converting trichloroethylene present in 1,2-dichloroethane by chlorination of the trichloroethylene in the liquid phase in the absence of light and in the presence of a Lewis acid catalyst wherein chlorine, 1,2-dichloroethane containing trichloroethylene and ethylene are introduced to a homogeneous reaction zone, with the mole ratio of ethylene to trichloroethylene being at least 50 and the mole ratio of trichloroethylene to chlorine being a maximum of 0.02.
    Type: Grant
    Filed: December 21, 1973
    Date of Patent: January 27, 1976
    Assignee: Rhone-Progil
    Inventors: Jean-Claude Strini, Jean-Raymond Costes
  • Patent number: 3933931
    Abstract: Perfluoroaklyl iodides are prepared by reacting iodine, iodine pentafluoride and tetrafluoroethylene in the presence of a fluoride catalyst selected from the group consisting of niobium fluoride, tantalum fluoride, boron fluoride, and molybdenum fluoride.
    Type: Grant
    Filed: October 8, 1971
    Date of Patent: January 20, 1976
    Assignee: Asahi Glass Co., Ltd.
    Inventors: Yoshio Oda, Manabu Suhara
  • Patent number: 3933915
    Abstract: Lower hydroxyalkyl amines in which at least one of the amino hydrogens is replaced by an acyclic monoterpenyl radical or hydrogenated acyclic monaterpenyl radical are useful repellents for insect repelling compositions.
    Type: Grant
    Filed: May 16, 1974
    Date of Patent: January 20, 1976
    Assignee: SCM Corporation
    Inventors: Carl Bordenca, Kenneth P. Dorschner, Robert P. Johnson
  • Patent number: 3932519
    Abstract: A multi-step, stereospecific total synthesis of steroids is disclosed. The starting materials for this process are the relatively inexpensive and readily available m-alkoxy acetophenones. The process is suitable for the preparation of racemic or optically active, medicinally valuable steroids, particularly A-ring aromatic steroids. This process features an early optical resolution and a unique asymmetric induction which insures the correct stereochemistry of the final steroidal product.
    Type: Grant
    Filed: October 16, 1973
    Date of Patent: January 13, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Noal Cohen, Gabriel Saucy
  • Patent number: 3932544
    Abstract: Meso-1,2,3,4-tetrachlorobutane is produced in an improved liquid phase chlorination process wherein trans-1,4-dichlorobutene-2 is contacted with chlorine which is added to the reaction zone throughout the chlorination reaction at a rate of from about 0.01 to about 2.0 mole percent per minute based on the amount of trans-1,4-dichlorobutene-2 initially present.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: January 13, 1976
    Assignee: Petro-Tex Chemical Corporation
    Inventor: Billy J. Lovelace
  • Patent number: 3932542
    Abstract: Selective bromination process for 2,5-dibromo-p-xylene which comprises bromination of p-xylene using approximately stoichiometric amounts of bromine and a hydrated iron containing bromination catalyst to give selectively high yields of substantially pure 2,5-dibromo-p-xylene.
    Type: Grant
    Filed: August 26, 1974
    Date of Patent: January 13, 1976
    Assignee: Great Lakes Chemical Corporation
    Inventor: Fred R. Gerns
  • Patent number: 3931344
    Abstract: The following newly synthesized bromofluoromethylcyclopropanes have been found to possess utility as general inhalation anesthetics: 1-bromo-1,2-difluoro-2-methylcyclopropane and 1-bromo-1-fluoro-2-methylcyclopropane.
    Type: Grant
    Filed: December 26, 1974
    Date of Patent: January 6, 1976
    Assignee: W. R. Grace & Co.
    Inventors: Charles Alden Billings, Gerald Joseph O'Neill, Charles William Simons, Robert S. Holdsworth