Patents Represented by Law Firm Keil & Witherspoon
  • Patent number: 4477424
    Abstract: An improved process for the continuous preparation of hydroxylammonium salts by catalytic reduction of nitric oxide with hydrogen in a dilute aqueous solution of a mineral acid in the presence of a suspended noble metal catalyst at an elevated temperature in several reaction zones connected in series, wherein the improvement comprises maintaining a pH of <2.0 in the last reaction zone.
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: October 16, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Otto-Alfred Grosskinsky, Elmar Frommer, Gunther Rapp, deceased, Erwin Thomas
  • Patent number: 4474741
    Abstract: A process for the preparation of a crystalline aluminosilicate of the pentasil type by hydrothermal crystallization of SiO.sub.2 and Al(OH).sub.3 in the presence of an alkali metal salt at from 80.degree. to 250.degree. C., wherein the crystallization is carried out in ether or aqueous ether. Particularly suitable solvents include the ethers from the group of the poly-(ethylene glycol) dimethyl ethers and mixtures of these ethers with water. The use of these crystalline aluminosilicates as catalysts for alkylating aromatics, and for preparing olefins and/or aromatics from methanol and/or dimethyl ether is also described.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: October 2, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Hoelderich, Laszlo Marosi, Wolf D. Mross, Matthias Schwarzmann
  • Patent number: 4474986
    Abstract: A process for the preparation of propafenone wherein1. 2'-hydroxyacetophenone is reacted with epichlorohydrin,2. the resulting 2-(2',3'-epoxypropoxy)-acetophenone is reacted with propylamine,3. the resulting 2-(2'-hydroxy-3'-propylaminopropoxy)-acetophenone is reacted with benzaldehyde, accompanied by elimination of water, and4. the resulting 2-(2'-hydroxy-3'-propylaminopropoxy)-benzalacetophenone is hydrogenated.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: October 2, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Helmut Lietz
  • Patent number: 4468315
    Abstract: A process for hydrogenating coal which has been mixed with oils, by bringing the coal slurry to the reaction pressure by pumping, heating the slurry and catalytically hydrogenating it with hydrogen, wherein some or all of the hot gases and vapors formed during hydrogenation are intimately re-mixed with the coal slurry in a plurality of stages. After the first mixing stage, the gases are freed from the product, and the product-free gases, especially hydrogen, are used as a thermal medium.
    Type: Grant
    Filed: January 7, 1982
    Date of Patent: August 28, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Helmut Romberg
  • Patent number: 4465247
    Abstract: A magnetic tape transport apparatus wherein at least one capstan simultaneously drives the take-up and supply reels, and wherein tape tension is generated by a braking device allotted to each tape reel, each braking device consisting of an assembly of levers (A, B, C, and D, E, Z) and a braking cable which is wound around the axle supporting the tape reel, and by means of which the braking forces are so adjusted that it is always the axle of the supply reel which is braked, while the axle of the take-up reel runs relatively freely. In a practical embodiment, the lever assembly comprises at least three hingedly connected levers (A, B, C and D, E, Z), viz. two lateral levers and an interconnecting lever, it being possible to obtain different lever arrangements by varying the locations of the movable pivot points (G) and the fixed fulcrum points (F) FIGS. 1 to 3).
    Type: Grant
    Filed: September 1, 1981
    Date of Patent: August 14, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Lothar Gliniorz, Peter Dobler, Klaus Schoettle
  • Patent number: 4461327
    Abstract: A process and device for charging a plurality of tubes in a tube reactor with granular solids, preferably with catalysts, which, for this purpose, are fed from one or more stock vessels to a controllable metering device and from there, via guiding and directing devices and flexible hose connections, successively into the tubes to be filled, wherein, during the packing of the tubes, a stream of gas of constant amount is generated, which can, after an individual tube has been packed, be passed temporarily, via one or more controllable valves, through this packed tube, a pressure drop measurement being carried out at the same time and the differential between the measured value and the predetermined intended value being used to determine a small additional amount of packing material which is subsequently introduced into the tube which has been subjected to measurement, and wherein thereafter a program control triggers the mechanical packing of the next tube, metered in the same manner, with subsequent pressure d
    Type: Grant
    Filed: May 28, 1981
    Date of Patent: July 24, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Magin, Franz Nenninger, Gerd-Juergen Engert
  • Patent number: 4458929
    Abstract: The subject of the invention is an automatic locking mechanism for a revolving shutter to protect the latter against unauthorized pulling up from the outside, using a locking device which is moved into the locking position after the revolving-shutter casing has been lowered. The device has a lateral axle bearing, with a round bearing element (11) for a belt pulley (2) and a fixed square bearing pin (8) connected thereto and the end of which is designed as a round cylinder. The belt pulley (2) has an annular web (2a) and the roller insertion cap (1) has an annular web (1a), the side webs (1a/2a) having different diameters and interlocking coaxially. A pivotable locking lever (6) engages positively through coinciding gaps. In the lowered state of the revolving-shutter casing, the lever (6) engages with the fixed bearing pin (8) and clamps belt pulley and roller insertion cap against unauthorized turning, so that the revolving-shutter roller connected to the roller insertion cap is also locked.
    Type: Grant
    Filed: June 30, 1981
    Date of Patent: July 10, 1984
    Inventor: Gunter J. A. Pade
  • Patent number: 4459301
    Abstract: Bispidine derivatives of the formula I ##STR1## where R is hydrogen or amino, and their salts with physiologically tolerated acids. The compounds possess antiarrhythmic properties.
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: July 10, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz Binnig, Claus D. Mueller, Manfred Raschack, Gerda von Philipsborn
  • Patent number: 4457723
    Abstract: A fabric formed from fiber-like strands of hollow, transparent filaments which have been woven or otherwise joined together is disclosed. The hollow strands contain a liquid in which color-coded micromagnets are dispersed. The micromagnets are free to rotate within the filament, the fabric thereby being capable of changing colors, either selectively or totally, when an activating magnetic force causes the micromagnets therein to rotate. The fabric may incorporate, in place of color-coded micromagnets, other orientable bodies which are also capable of being oriented, as for example by an electromagnetic or electrostatic force field, to produce a visual display. Further, the fabric may comprise a material having one or more liquid filled veins, the liquid again containing color-coded micromagnets or orientable bodies dispersed therein.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: July 3, 1984
    Assignee: Thalatta, Inc.
    Inventor: Clarence R. Tate
  • Patent number: 4456160
    Abstract: A guide device for tape-like recording media, especially a reversing guide device for magnetic tapes, that are transported at high speed, which comprises at least one guide roll, around whose periphery the recording medium is guided, and which is rotatably mounted in bearings, a deliberate specific braking torque being produced between the guide roll and its bearings. Further embodiments concern the roughness of the roll's peripheral surface, the design of flanges for the lateral guidance of the recording medium and the use of two guide rolls. The braking torque is produced by braking means acting on the guide roll. The novel guide device can be used advantageously in any high-speed magnetic tape transport apparatus for the recording/reproduction of any type of audio, video or data signal.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: June 26, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Andreas Ilmer, Joachim Flohr
  • Patent number: 4455252
    Abstract: A phlegmatized organic peroxide composition is disclosed which contains a liquid organic peroxide and a metallic soap of a higher fatty acid in an amount sufficient to phlegmatize the liquid peroxide. Viscosity modifiers may be added to render the composition non-tacky.
    Type: Grant
    Filed: July 22, 1981
    Date of Patent: June 19, 1984
    Assignee: The Norac Company, Inc.
    Inventors: Kenneth B. Wylegala, James R. Fischer, Franklin A. Long, Deborah L. Golob
  • Patent number: 4453683
    Abstract: A cassette system for any type of recording medium in strip or tape form, such as films and magnetic tapes, consists essentially of a housing whose external dimensions match those of a conventional type of cassette, and a protective holder for the recording medium which is wound into at least one roll. The housing and the holder are separate or separable members and can be fitted together. Both are provided with means for inserting the holder into the housing in the correct position, and for introducing the recording medium into the transport apparatus. The housing is provided with opening and closing means. The holder can be designed to be separable from the roll of recording medium. Preferably, the housing is a precision-made article and the holder a low-cost article.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: June 12, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl-Juergen Reimer, Dietmar Pfefferkorn, Eberhard Koester, Norbert Kreimes, Wilhelmus Andriessen, Herbert Wagner, Werner Wagner
  • Patent number: 4454358
    Abstract: Ethanol is produced continuously via the carbonylation of methanol, by(a) carbonylating methanol, in a reactor R, in the presence of a carbonyl complex of a metal of group VIII of the periodic table and of a halogen compound,(b) separating, in a distillation column D1, the reactor discharge, into a top fraction comprising methyl acetate, methanol, dimethyl ether and an organohalogen compound, and into a bottom fraction comprising water, small quantities of acetic acid and the catalyst, if the latter is not in a fixed bed, the residence time being so adjusted that the greater part of the acetic acid reacts with the methanol present to give methyl acetate,(c) separating the top fraction from D1, in a distillation column D2, into a top fraction comprising small quantities of methyl acetate, methanol, dimethyl ether and the organo-halogen compound, and a bottom fraction comprising methyl acetate and methanol, and recycling the top fraction to reactor R,(d) distilling off, via the top of distillation column D3, th
    Type: Grant
    Filed: January 7, 1982
    Date of Patent: June 12, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Kummer, Volker Taglieber, Heinz-Walter Schneider
  • Patent number: 4454318
    Abstract: 4-Chloro-5-amino-2-phenyl-3(2H)-pyridazinone is prepared from 4,5-dichloro-2-phenyl-3(2H)-pyridazinone and ammonia in high yield and substantially free from 4-amino-5-chloro-2-phenyl-3(2 H)-pyridazinone in a method comprising reacting 4,5-dichloro-2-phenyl-3(2H)-pyridazinone with aqueous ammonia in the presence of a catalyst which is capable of selectively exchanging the 5-chlorine atom in 4,5-dichloro-2-phenyl-3(2H)-pyridazinone with a leaving group of such a nature that the resulting intermediate compound is capable of alkylating ammonia to 4-chloro-5-amino-2-phenyl-3(2H)-pyridazinone in high yield in the reaction medium, thereby regenerating the catalyst. The end product is isolated by filtration after the reaction and washed with water, and the mother liquor plus the wash water are used as reaction medium for the next batch.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: June 12, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Niels Clauson-Kaas, Gert Jansen, Erik Olsen
  • Patent number: 4453577
    Abstract: A nozzle for filling containers with liquid, with automatic closing of the nozzle, when they are full, by means of a flow valve which is controllable by a delivery lever via a detachable connection. The connection is acted upon by a switching device which, according to the pressure in a pressure channel terminating at the outlet orifice of the nozzle, causes the valve to close.
    Type: Grant
    Filed: April 22, 1982
    Date of Patent: June 12, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Romberg, Horst Koerner
  • Patent number: 4454178
    Abstract: Poly(acetylene) films are produced by polymerization of acetylene, if appropriate mixed with a di- and/or poly(alkyne), in the presence of an active transition metal catalyst on filaments, fibers, woven or knitted fabrics, nonwovens, laid webs, interlaced structures or nets composed of metals, glass or natural and/or synthetic fibers.
    Type: Grant
    Filed: October 29, 1982
    Date of Patent: June 12, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Naarmann, Dieter Naegele, Klaus Penzien
  • Patent number: 4451088
    Abstract: A process for gaining access to the coal of very deep seams, and for extracting this coal with the aid of a conveying liquid, which is fed to the seams via boreholes and is thence brought back again to the surface with coal which has been detached, wherein agents for detaching and breaking up the coal are admixed to the liquid.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: May 29, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Karl Wisseroth
  • Patent number: 4449914
    Abstract: An injection mold comprising a fixed and a movable mold half and a demolding device for the moldings, which essentially consists of grippers and a kinematic chain, by means of which the opening movement of the mold half is transferable to the holders of the grippers. By this means, the opening movement of the mold half can cause the grippers to move towards the moldings to be taken out of the mold half.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: May 22, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Kurt Schmidts, Walter Schuett, Edmond Zeysolff, Wilhelm Saumer
  • Patent number: 4450277
    Abstract: A process for the preparation of 1-substituted imidazoles by reacting an .alpha.-dicarbonyl compound with ammonia, an aldehyde and a primary amine in an aqueous medium, in a single stage, at 20.degree.-150.degree. C.
    Type: Grant
    Filed: September 25, 1980
    Date of Patent: May 22, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz Graf, Leopold Hupfer
  • Patent number: D276910
    Type: Grant
    Filed: September 8, 1981
    Date of Patent: December 25, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Emil Lohrer, Guenter Hirsch, Hans J. Wolf