Patents Represented by Law Firm Keil, Thompson & Shurtleff
  • Patent number: 4122248
    Abstract: A process for the manufacture of copolymers of ethylene with tert-butyl acrylate and acrylic acid at from 200.degree. to 350.degree. C under pressures above 800 atmospheres using mean residence times of up to at most 100 seconds, in which the reaction mixture obtained from the polymerization is kept for from 2 to 10 minutes at from 200.degree. to 250.degree. C under a pressure of not more than 500 atmospheres. Terpolymers are obtained which may be used as hot-melt adhesives in the form of thin and extremely homogeneous films.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: October 24, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Pfleger, Klaus Boettcher, Wieland Zacher, Dirk Juza
  • Patent number: 4122263
    Abstract: Production of new 2-(o-alkylthiophenyl)-1,3-diazacycloalkene hydrohalides by reaction of a benzo-thietane-2-spiro-2'-(1',3'-diazacycloalkane) with an alkyl halide, and the new 2-(o-alkylthiophenyl)-1,3-diazacycloalkene hydrohalides which are pharmaceuticals, auxiliaries for the textile and rubber industries, plant protection agents and starting materials for the production of pharmaceuticals, plant protection agents and dyes.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: October 24, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Hagen, August Amann, Hubert Giertz
  • Patent number: 4122285
    Abstract: Butenediol diacetate is manufactured by reaction of butadiene, oxygen and acetic acid over a palladium or platinum catalyst, only liquid, and no gases, being present in the reaction chamber.
    Type: Grant
    Filed: August 13, 1976
    Date of Patent: October 24, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Martin Weitz, Ludwig Vogel, Juergen Hartig, Eckhard Hetzel
  • Patent number: 4122219
    Abstract: In the manufacture of flocked textiles by applying a polymer emulsion, flocking and drying, a heat-sensitized polymer emulsion is used and the emulsion coat is first only gelled, by heating, in the zone adjoining the textile substrate, and is then flocked and dried at an elevated temperature.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: October 24, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Fickeisen, Gert Elschnig, Hanns-Dietmar Haertl, Kurt Wendel, Klaus Eisentraeger
  • Patent number: 4120667
    Abstract: To isolate ammonia from gas mixtures containing ammonia and carbon dioxide, the gas mixture is first partially absorbed in a solvent, with residence times of at most 0.1 second, and the non-absorbed gas is then separated from the solution obtained. The solution is then subjected to a first desorption stage, in which only the ammonia present in an excess over a molar ratio of 3 parts of ammonia to 1 part of carbon dioxide is expelled by heating, and the entrained carbon dioxide is washed out of the expelled ammonia by means of solutions containing free ammonia. The solution remaining after the first desorption stage is substantially freed from ammonia and carbon dioxide in a second desorption stage and the expelled gas, containing solvent, together with fresh gas mixture is fed to the adsorption stage, while the solvent obtained from the second desorption stage is employed for the absorption.
    Type: Grant
    Filed: October 12, 1977
    Date of Patent: October 17, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Gettert, Hermann Dieter Fromm, Martin Molzahn, Ernst-Juergen Schier, Hans Henning Schneehage
  • Patent number: 4120884
    Abstract: Storage-stable, liquid, only slightly colored polyisocyanates possessing carbodiimide groups and having an isocyanate content of from about 25 to 35% by weight, based on total weight; these products are obtained by condensing polyisocyanates in the presence of phospholines, phospholidines and/or their oxides, and stopping the condensation and stabilizing the condensation products with the Lewis acids, aromatic carboxylic acid halides, aromatic sulfonic acid esters and/or alkyl sulfates.
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: October 17, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Frank Peter Woerner, Peter T. Kan, Georg Falkenstein
  • Patent number: 4120823
    Abstract: A process for the manufacture of a titanium-containing component of a catalyst for the polymerization of monoolefins by the Ziegler-Natta method by milling (a) a titanium trichloride/aluminum trichloride complex and (b) a particular ether with one another, in which process (1) a vibratory ball mill producing a particular milling acceleration is used, (2) until from 6 to 85% of the aluminum trichloride originally present in a bonded form in the titanium-containing compound (a) have been eliminated from the said compound (a). Polyolefins of high stereoregularity can be obtained in a high specific yield by means of the catalyst component manufactured according to the invention.
    Type: Grant
    Filed: November 30, 1977
    Date of Patent: October 17, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Mueller-Tamm, Hans Schick, James F. R. Jaggard, Johann Nickl
  • Patent number: 4120078
    Abstract: A process for the simultaneous texturizing and entangling of filament bundles by treating filament bundles of synthetic, high-molecular weight materials with a heated fluid in two tubular treatment chambers, in which process spatial or periodic irregularities are produced, in the treatment zones, in the flow of fluid and/or filament bundles. Preferably, a certain range of values of a volume mass flow factor is adhered to.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: October 17, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Martin, Wolfgang Bauer, Dieter Herion, Hermann Linge, Hans Knopp
  • Patent number: 4121027
    Abstract: A process for the manufacture of reactive polymers of vinyl monomers by reacting the latter, or the polymers formed therefrom, with compounds which form free radicals.The latter compounds are tetrakis-(organylthio)-methanes, 1,1,2,2-tetrakis-(organylthio)-ethanes or hexakis-(organylthio)-ethanes.The polymers obtained can readily be modified, e.g. by oxidation or quaternisation.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: October 17, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Pohlemann, Herbert Naarmann, Dieter Seebach
  • Patent number: 4120868
    Abstract: New acetals, containing a 6-membered ring, of 2-methyl-2,4-dialkoxy-3-buten-1-al, are obtained by reacting the corresponding 2-methyl-2-alkoxy-3-butyn-1-al-acetals with a mixture of the appropriate alcohol and an alkali metal alcoholate of the said alcohol at from 100.degree. to 200.degree. C. The acetals are intermediates for the preparation of carotinoid-based physiologically safe food dyes.
    Type: Grant
    Filed: December 9, 1977
    Date of Patent: October 17, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Hagen Jaedicke, Joachim Paust
  • Patent number: 4121266
    Abstract: A polyamide-imide precondensate which is solid at room temperature, but is fusible and soluble in polar solvents. It is manufactured by first condensing 1 mole of diamine with 2 moles of tricarboxylic acid anhydride in a diol as the solvent, to give a diimide-dicarboxylic acid, then esterifying the diimide-dicarboxylic acid with the diol and finally effecting the polycondensation by adding 1 mole of diamine per mole of diester. The precondensate may be used, as a melt, as a solution in organic solvents or as an aqueous dispersion, for coating electrical conductors.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: October 17, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Jenoe Kovacs, Hans Jung, Matthias Marx, Herbert Spoor
  • Patent number: 4119665
    Abstract: A process for the manufacture of 6-aminocaproamide, wherein methyl or ethyl 5-cyanovalerate is reacted with excess ammonia at temperatures of from 25.degree. to 200.degree. C and the resulting 5-cyanovaleramide is hydrogenated at temperatures of from 25.degree. to 200.degree. C and pressures of from 50 to 300 bars in the presence of ammonia and of supported cobalt and/or nickel catalysts. 6-Aminocaproamide is suitable for the manufacture of caprolactam.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: October 10, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Martin Weitz, Rolf Fischer, Franz Josef Broecker
  • Patent number: 4119767
    Abstract: In a secondary battery employing an aqueous lead salt solution as the electrolyte, salts of manganese, cobalt, nickel, copper, thallium, bismuth and/or antimony are additionally present in concentrations of from 0.1 to 100 mmole/l.
    Type: Grant
    Filed: April 1, 1977
    Date of Patent: October 10, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz Beck, Rolf Wurmb, Klaus Boehlke
  • Patent number: 4119644
    Abstract: Dyes of the formula ##STR1## where X is chlorine or bromine, Y is ##STR2## and n is 0, 1 or 2. On synthetic fiber materials, the dyes give clear blue colorations which are very fast to thermofixing and fast to light.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: October 10, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Epple, Walter Himmele, Werner Fliege
  • Patent number: 4119621
    Abstract: P-aminoazo dyes of the formula: ##STR1## in which D is a benzoisothiazolyl group;B.sup.1 is hydrogen, methyl, ethyl, methoxy, ethoxy;B.sup.2 is hydrogen, methyl, ethyl, methoxy, ethoxy, chloro, bromo, C.sub.1 to C.sub.4 alkanoylamino or C.sub.1 to C.sub.4 alkoxycarbonylamino;R.sup.1 is the radical ##STR2## C.sub.1 to C.sub.4 alkyl optionally bearing hydroxy, C.sub.1 to C.sub.4 alkoxy, C.sub.1 to C.sub.4 alkanoyloxy, C.sub.1 to C.sub.4 alkoxycarbonyl, C.sub.1 to C.sub.4 alkanoylamino or chloro as a substituent, phenylethyl, phenoxyethyl or cyclohexyl and the group -A.sup.1 --CO--A.sup.2 represents acyl, acyloxy or acylamino derived from a carbonic acid derivative in which A.sup.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: October 10, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Guenter Hansen, Hermann Kaack, Norbert Grund
  • Patent number: 4119673
    Abstract: Formaldehyde is manufactured by oxidative dehydrogenation of methanol in the presence of a silver catalyst and of certain amounts of steam and formaldehyde, some formaldehyde and a part of the water being withdrawn from the reaction mixture and recycled. The formaldehyde manufactured by the process may be used as a disinfectant, tanning agent, reducing agent and starting material for the manufacture of synthetic resin, adhesives and plastics.
    Type: Grant
    Filed: September 16, 1975
    Date of Patent: October 10, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Albrecht Aicher, Hans Haas, Hans Diem, Christian Dudeck, Fritz Brunnmueller, Gunter Lehmann
  • Patent number: 4119387
    Abstract: Pavement joint structures utilizing laterally spaced, elongated metal frames with a four-sided, compartmented, elongated, elastomer seal locked in the frames and spanning the space, the seal having a double arch, nadir-to-apex internal web structure.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: October 10, 1978
    Assignee: The D. S. Brown Company
    Inventor: Delmont D. Brown
  • Patent number: 4118843
    Abstract: Apparatus and process for thermal treatment of thermoplastic polymer multifile filaments embodying at least one stuffing chamber for forming at least one multifile filament into at least one tightly coherently packed filamentary body, feeding one or more of said filamentary bodies onto gas-permeable, slowly rotating drum on which it or they are conveyed in a side-by-side, spiral orientation by the rotating drum while a fluid, e.g., air is drawn through the filamentary bodies, said filamentary bodies being conveyed from the stuffing chamber at a constant rate and being deflected at a predetermined pitch angle before or during initial contact with the drum surface.
    Type: Grant
    Filed: July 13, 1977
    Date of Patent: October 10, 1978
    Assignee: Barmag Barmer Maschinenfabrik Aktiengesellschaft
    Inventors: Heinz Schippers, Peter Dammann, Karl Bauer
  • Patent number: 4119622
    Abstract: An azo compound useful in copying processes of the formula ##STR1## where R.sup.1 is hydrogen or alkyl of 1 to 4 carbon atoms, R.sup.2 and R.sup.3 are each alkyl of 1 to 4 carbon atoms, or one of the radicals R.sup.1, R.sup.2 and R.sup.3 is unsubstituted phenyl or phenyl substituted by alkyl of 1 to 4 carbon atoms, methoxy or ethoxy, and A denotes ##STR2## where R.sup.4 and R.sup.5 are each hydrogen; alkyl of 1 to 8 carbon atoms which may be substituted by hydroxy, alkoxy, halogen or alkoxycarbonyl; cyanoethyl; alkylcarbonyl with 1 to 3 carbon atoms in the alkyl; cyclohexyl; phenalkyl of 7 to 10 carbon atoms; or substituted or unsubstituted phenyl, or R.sup.4 is N,N-dialkylaminoalkyl or N,N-bisphenalkylaminoalkyl, or the group ##STR3## is a 5-membered or 6-membered saturated heterocyclic ring which may contain an --O-- or --S-- group as ring member, Y is hydroxy, alkyl, alkoxy, chlorine, bromine or alkylcarbonylamino, n is 0, 1 or 2, R.sup.6 and R.sup.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: October 10, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Baumann, Andreas Oberlinner
  • Patent number: 4118616
    Abstract: A cassette, particularly a cassette for a wide recording tape, consisting essentially of a lid-closable housing of plastics material, snap latch means being provided which interact between the long side of the lid and the wall of the housing opposite the lid hinge, which means consist, according to the invention, of cams on the lid and grooves in the wall of the housing, which cams and grooves engage each other to produce, when the cassette is opened, an initial closing force by deformation of the adjacent wall of the housing, in order to make opening of the cassette more difficult.
    Type: Grant
    Filed: May 12, 1977
    Date of Patent: October 3, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Wittkamp, Manfred Gehrung