Patents Represented by Law Firm Keil & Witherspoon
  • Patent number: 4440461
    Abstract: A receptacle comprising a housing (14) and drawers (15) and (16). Drawers (15) and (16) having ends (17) provided with an integral upper ridge (18) and integral lower ridge (19). Housing (14) having end panels (23) provided with inwardly facing integral ridges (21) and indents (22). Coacting between the integral ridges is a floating element (8) which permits the drawers (15) and (16) to slide in and out of the housing (14).
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: April 3, 1984
    Assignee: Sinclair & Powell Proprietary Limited
    Inventors: George G. Powell, Reece J. Powell
  • Patent number: 4440859
    Abstract: Microorganism having a gene derived from a higher organism is produced by isolating cells from a higher organism containing messenger RNA, extracting the messenger RNA, synthesizing a double stranded cDNA using the messenger RNA as a template, inserting the cDNA into a plasmid and transforming a microorganism with the resultant recombinant plasmid.
    Type: Grant
    Filed: September 11, 1981
    Date of Patent: April 3, 1984
    Assignee: The Regents of the University of California
    Inventors: William J. Rutter, Howard M. Goodman, Axel Ullrich, John Shine, John Chirgwin, Raymond Pictet
  • Patent number: 4440960
    Abstract: A process for the continuous preparation of 3-alkyl-buten-1-als by oxidative dehydrogenation of 3-alkyl-buten-1-ols at from 320.degree. to 650.degree. C. with oxygen over a catalyst containing copper and/or silver, wherein, within one second after contact with the catalyst, the vaporous reaction mixture, which is at from 320.degree. to 650.degree. C., is brought into contact with a liquid comprising water and/or the condensed reaction mixture at from -20.degree. to 50.degree. C., and the 3-alkyl-buten-1-als are separated off from the resulting condensate.
    Type: Grant
    Filed: December 11, 1981
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Sauer, Werner Aquila, Wolfgang Hoffmann, Karl Brenner, Klaus Halbritter
  • Patent number: 4440693
    Abstract: A process for the preparation of electrically conductive products which are stable to air and have conductivities greater than 1 .times.10.sup.-3 S/cm, by reacting a cation of a metal of group VII or VIII or of sub-group I of the periodic table with an organic chelating compound to give a metal chelate and oxidizing the latter to form a oxidized product, wherein the organic chelating compound is a 1,9-substituted phenalene of the formula I ##STR1## where X is O, NH, S, Se or Te and Y is OH, NH.sub.2 or SH. The electrically conductive products are useful for the production of solar cells, the conversion and fixing of radiation, the production of electrical and magnetic switches and the antistatic treatment of plastics.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Naarmann, Klaus Penzien, Volker Muench, Klaus-Dieter Franz
  • Patent number: 4440299
    Abstract: A container for at least one carrier member bearing a tape-like recording medium comprises a hollow body and a ramp declining toward an insertion/withdrawal opening, the carrier member with the recording medium being held in the hollow body by holding means and being transferred, after its release, via the ramp to the withdrawal position in which it protrudes at least partially from the opening. The holding means is advantageously a spring-loaded element mounted movably relative to the hollow body and preferably located on a slide.A plurality of containers can easily be connected to one another by tongue-shaped members which can be inserted into recesses in two abutting side walls, and can easily be detached from one another again.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Ludwig Peinecke
  • Patent number: 4439933
    Abstract: A vertical cylinder for drying and heating granules which includes an inlet at the top of the cylinder, a conically tapered outlet at the bottom of the cylinder, a rotatable screening ring beneath the inlet, a chute beneath the screening ring and a scraper above the ring inlets for gases in the downward extending section of the cylinder, a shell and tube heat exchanger located coaxially in the bottom quarter of the cylinder, a horizontally movable grid as flow control device below the heat exchange and a discharge zone below the grid.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Ernst Dietrich, Ernst Guenther, Werner Hoerauf, Ernst Kissel, deceased, Hermann Linge, Eckart Neumann, Eberhard Schaefer
  • Patent number: 4441130
    Abstract: A carriage for a scanning head in recording and/or playback apparatus for disk records, a first rod-shaped guide member being provided for the support and longitudinal guidance of the carriage, and a second rod-shaped guide member being provided for the transverse support of the carriage, wherein the carriage possesses at least one prism-shaped aperture for said first rod-shaped guide member, and at least one leaf spring presses the carriage against the rod-shaped guide members.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Udo Boehm, Klaus Schulze-Berge, Roland Brotzler
  • Patent number: 4439231
    Abstract: Acicular ferromagnetic metal particles consisting essentially of iron are prepared by a process wherein acicular iron(III) oxide hydroxide provided with a shape-stabilizing surface coating, or iron(III) oxide obtained therefrom by dehydration, is reduced by means of a decomposable organic compound and hydrogen.
    Type: Grant
    Filed: July 28, 1983
    Date of Patent: March 27, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Steck, Peter Rudolf, Wilhelm Sarnecki, Werner Loeser, Jenoe Kovacs, Helmut Jakusch
  • Patent number: 4438892
    Abstract: In a magnetic tape cassette, especially a compact cassette, at least one hole in the conventional liners is provided, according to the invention, with at least one raised edge portion which is located between the aperture in the housing wall for admitting the drive spindle and the inner wall of the hub, and serves as a resilient support for the hub.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: March 27, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Horst Fitterer, Hubert Koob, Bert Nestler
  • Patent number: 4439579
    Abstract: Aqueous thermosetting electrical insulating varnishes are prepared by a process wherein hydroxyl-containing polyester-imides which have kinematic viscosities of from 16 to 30 mm.sup.2 .multidot. s.sup.-1 and acid numbers of <10, and which have been obtained by condensing aromatic tricarboxylic acid monoanhydrides, aromatic dicarboxylic acids or their esterifiable or transesterifiable derivatives, diamines, diols, and triols containing an isocyanurate ring, are treated, at from 80.degree. to 130.degree. C., in the presence or absence of up to 5% by weight, based on polyester-imide, of an organic solvent, with from 5 to 15% by weight, based on polyester-imide, of ammonia in the form of an aqueous solution, thereby producing aminolysis and hydrolysis so that a neutral or slightly acidic solution results, which is diluted to a viscosity of from 100 to 10,000 mPa.s by adding demineralized water, from 0.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: March 27, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Udo Reiter, Hans-Uwe Schenck, Helmut Lehmann, Ferdinand Hansch
  • Patent number: 4438131
    Abstract: .omega.-Cyano-1,.omega.-diphenyl-azaalkane derivatives of the formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, m and n have the meanings given in the description, and salts thereof with physiologically tolerated acids, are useful in treating cardiovascular disorders.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Oskar Ehrmann, Manfred Raschack, Josef Gries, Rolf Kretzschmar, Hans D. Lehmann, Ludwig Friedrich, Dirk Wuppermann, Frank Zimmermann, Werner Seitz, Hans J. Treiber, Ferdinand Dengel, Wolfram Frank, Hans-Georg Kurbjuweit, Claus D. Mueller
  • Patent number: 4438084
    Abstract: Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction is carried out in vessels of which the walls consist essentially of conventional copper-free molybdenum-containing austenitic chromium-nickel steels which contain from 16 to 28% by weight of chromium, from 10 to 50% by weight of nickel, from 1 to 4% by weight of molybdenum and at most 0.05% by weight of carbon, together with at least 0.05% by weight of nitrogen up to 0.5% by weight.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Guenther Rapp, Erwin Thomas, Rolf Muenster
  • Patent number: 4437878
    Abstract: Dihydrothiophenecarboxylates of the formula ##STR1## where R.sup.1 and R.sup.2 have the meanings given in the description, are used for controlling undesirable plant growth.
    Type: Grant
    Filed: March 31, 1983
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf-Dieter Acker, Phillip A. Rossy, Gerhard Hamprecht, Bruno Wuerzer
  • Patent number: 4438462
    Abstract: A process for authenticating recording media which are to be safeguarded against falsification and which possess a layer of exchange-anisotropic magnetic material, by determining the residual recording which is left over, because of the exchange anisotropy of the magnetic material, from a recording of a sequence of signals after exposure of the material to a specific temperature cycle and, subsequently, to a magnetic AC field which decreases to zero, and an apparatus for carrying out the said process.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Koester, Joachim Hack, Manfred Steuerwald
  • Patent number: 4436897
    Abstract: An improved process for the preparation of fiber-forming polycaprolactam by polymerizing .epsilon.-caprolactam, and an aqueous extract containing .epsilon.-caprolactam and caprolactam oligomers, which extract has been obtained by extracting polycaprolactam with water, wherein the aqueous extract contains from 0.1 to 5.0% by weight of oligomers of caprolactam, based on the monomeric caprolactam in the aqueous extract.
    Type: Grant
    Filed: August 24, 1982
    Date of Patent: March 13, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Hugo Strehler, Werner Hoerauf, Friedrich Urbanek
  • Patent number: 4436833
    Abstract: A process for the preparation of methanol by reacting a gaseous mixture of carbon monoxide, carbon dioxide and hydrogen at an elevated temperature and under superatmospheric pressure over a catalyst which contains zinc, copper and aluminum, the catalyst being prepared from a co-crystalline material of the formulaCu.sub.2.2 Zn.sub.2.8 (OH).sub.6 (CO.sub.3).sub.2,containing aluminum hydroxide as a structual promoter, by calcination and reduction at from 160.degree. to 350.degree. C. The novel catalyst has the advantage of giving a substantially increased space-time yield and having a longer life.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: March 13, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz J. Broecker, Karl-Heinz Gruendler, Laszlo Marosi, Matthias Schwarzmann, Bruno Triebskorn, Guenter Zirker
  • Patent number: 4436854
    Abstract: Self-extinguishing molding materials, comprising (A) a polymer of a vinyl-aromatic compound, especially a styrene polymer, which has been made impact-resistant (B) a polyphenylene ether and (C) a flameproofing additive, with or without (D) conventional additives, wherein one part of the soft component of the impact-resistant polymer of the vinyl-aromatic compound has a mean particle size of .ltoreq.1.5 .mu.m and the other part has a mean particle size of .ltoreq.3 .mu.m. Such molding materials not only have good self-extinguishing properties but also give moldings having a particularly uniform matt surface.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: March 13, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Brandstetter, Volker Muench, Herbert Naarmann, Edmund Priebe
  • Patent number: 4436870
    Abstract: Molding materials containing high molecular weight polyphenylene ethers are produced by a process in which a solution of a polyphenylene ether in an organic solvent, together with another polymer, is freed of solvent by multi-stage evaporation.The solvent is preferably an aromatic compound from the class comprising the hydrocarbons, halohydrocarbons, ethers or esters, the ratio of the other polymer to the polyphenylene ether is advantageously from 99:1 to 20:80 parts by weight, the other polymer is, in particular, a homopolymer or copolymer of styrene or of a homolog thereof, which may be modified with rubber, and the multi-stage evaporation process preferably comprises not less than two and not more than four working up stages.The evaporation is carried out in general at from 120.degree. to 280.degree. C. and under a pressure of from 1 to 3,000 mbar, advantageously in the presence of assistants which reduce the partial pressure, eg. water and/or methanol.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: March 13, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Hinselmann, Herbert Naarmann, Adolf Echte, Eduard Heil, Albert Nikles, Rudi W. Reffert, Juergen Hambrecht
  • Patent number: 4436869
    Abstract: A process for the preparation of moldings, in particular resilient elements, which by virtue of a densified surface zone with substantially closed cells, have only a low water absorption, wherein a mixture comprising:(a) 100 parts by weight of an NCO-containing prepolymer, having an NCO content of from 3 to 6% by weight and based on organic diisocyanates and substantially linear polyester-polyols or polytetramethylene ether glycol,(b) from 0.5 to 1.6 parts by weight of water,(c) one or more catalysts, preferably a tertiary amine, in an amount of from 0.01 to 2.0 parts by weight and(d) assistants, with or without additives, is reacted in a closed mold, while undergoing densification, the surface temperature of the inner wall of the mold being from 50.degree. to 70.degree. C.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: March 13, 1984
    Assignee: Elastogran GmbH
    Inventors: Otmar Zipp, Heinz Bollmann, Herbert Stutz, Wolfgang Scholz
  • Patent number: 4436944
    Abstract: O-xylene and ethylbenzene are prepared by converting, 2,7-octadien-1-ol, 1,7-octadien-3-ol or mixtures containing these octadienols, or carboxylates of 2,7-octadien-1-ol or of 1,7-octadien-3-ol, or mixtures containing these carboxylates at from 200.degree. to 550.degree. C. over a catalyst.
    Type: Grant
    Filed: January 5, 1982
    Date of Patent: March 13, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Martin Weitz, Rolf Fischer, Hans H. Pohl