Patents Assigned to Aktiengesellschaft
  • Catalytic hydrolysis process for polyamines
    Patent number: 4931595
    Abstract: Polyamines containing primary amino groups are prepared in a single stage process by hydrolyzing an isocyanate in the presence of a catalyst incorporable through an NCO reactive group and a water-miscible aprotic-dipolar solvent. This hydrolysis is carried out at from 20.degree. to 210.degree. C. with the reactants being in substantially homogeneous phase. The isocyanate starting material has an NCO content of from 0.5 to 40% by weight. The catalyst is used in a quantity of at least 0.0001% by weight, based on 100% by weight of isocyanate compound. The water-miscible solvent is used in a quantity of at least 10% by weight, based on 100% by weight of isocyanate compound. The polyamines thus produced are particularly useful in the production of polyurethanes.
    Type: Grant
    Filed: August 2, 1989
    Date of Patent: June 5, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventor: Werner Rasshofer
  • Fiber-reinforced thermoplastic panels
    Patent number: 4931358
    Abstract: The invention relates to semifinished material consisting of a thermoplastic polymer and a needled textile fabric made up of at least two layers of oriented continuous filament yarn, each having an areal mass of not more than 300 g/m.sup.2, and at least one layer of unoriented fibers.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: June 5, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Ludwig Wahl, Helmut Vogel
  • Stud link
    Patent number: 4928740
    Abstract: A stud link for a tire chain, including a plate-like link body that has a tire contact surface and a wearing surface. The link body has at least one attachment hole for a chain link that is to be connected, and at least one central wearing element and two other wearing elements, one on each side of the central element. The wearing elements are disposed one after the other in a longitudinal direction of the stud link. At least one of the side faces of the central wearing element is recessed relative to the adjacent side faces of the other elements.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: May 29, 1990
    Assignee: Eisen- und Drahtwerk Erlau Aktiengesellschaft
    Inventor: Hubert Konig
  • Process for the separation of monolithic LED chip arrangements generated on a semiconductor substrate wafer
    Patent number: 4929300
    Abstract: LED chip arrangements fabricated monolithically on a semiconductor substrate wafer are to be separated from one another by scribing in such a way that they can be properly arrayed to obtain a tight image-dot grid over several LED chip arrangements. The metallization of the back side of the semiconductor substrate wafer is exposed in the area of a prescribed separation track. Prior to the separation, a depression is etched into the back side of the semiconductor substrate wafer.The process according to the invention is particularly useful in the manufacture of high-resolution LED arrays.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: May 29, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventor: Walter Wegleiter
  • New polyisocyanate-polyaddition compounds, a process for their preparation and their use for the dispersion of solids
    Patent number: 4929705
    Abstract: New polyisocyanate-polyaddition compounds, a process for their preparation and their use as wetting or dispersing agents for the incorporation of solids, in particular pigments, in lacquer or synthetic resin formulation.
    Type: Grant
    Filed: March 28, 1989
    Date of Patent: May 29, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jan Mazanek, Ulrich von Gizycki, Hanns P. Muller, Martin Wienkenhover, Karl-Heinz Wieser, Volker Paulat, Werner Theuer, Walter Muller
  • Shock wave generator for generating an acoustical shock wave pulse
    Patent number: 4928671
    Abstract: A shock wave generator has a focusing stage wherein a number of different lenses having respectively different concentrating characteristics are accommodated, and which can be selectively introduced transversely into the path of the shock wave pulse, by linear displacement or by pivoting. The lenses can be alternatively introduced one at a time in one embodiment, or in a second embodiment more than one lens can be simultaneously introduced to achieve a concentrating characteristic resulting from a combination of lenses. For further adjustment and flexibility, the shock wave generator is provided with at least two capacitors for selectively varying the amount of discharge energy used to trigger the shock wave. The approach path between the membrane which generates the shock wave and the lens can also be varied.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: May 29, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventors: Helmut Reichenberger, Georg Naser
  • Protective circuit for a power pack for excitation or de-excitation of a superconduction coil system
    Patent number: 4930034
    Abstract: A protective circuit for a power pack for exciting or de-exciting a superconducting system has a voltage monitoring circuit at the output of the power pack. A switch in parallel to the output of the power pack is closed by the voltage monitoring circuit as soon as output voltage exceeds a predetermined value in a direction opposite a supply voltage of the power pack. During a malfunction, the switch closes and conducts the current which is being driven by the superconducting coil system. The protective circuit can be utilized in devices such as superconducting magnets of a tomography apparatus.
    Type: Grant
    Filed: July 12, 1988
    Date of Patent: May 29, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bernd Kusserow, Klaus Gagneur, Siegfried Hofler
  • Terminal assembly for an integrated semiconductor circuit
    Patent number: 4930000
    Abstract: A terminal assembly for an integrated semiconductor circuit includes a semiconductor chip in the semiconductor circuit having a surface, end faces, an electrically active chip surface regions of the surface adjacent the end faces, electric circuits of the semiconductor chip within the electrically active chip surface defining at least one given area of the surface within the electrically active chip surface being free of electric circuits, contact pads disposed in the regions of the surface adjacent the end faces for electrically connecting the semiconductor circuit to electrical signals and/or potentials, and other contact pads disposed in the at least one given area between the regions of the surface adjacent the end faces for electrical connection to at least some of the electrical signals and/or potentials.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: May 29, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventor: Dieter Kantz
  • Method and compositions for controlling the pear leaf blister moth, Leucoptera scitella
    Patent number: 4929779
    Abstract: 5,9-dimethylheptadecane is used as an attractant in a composition for controlling the pear leaf blister moth, Leucoptera scitella.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: May 29, 1990
    Assignee: BASF Aktiengesellschaft
    Inventor: Wittko Francke
  • Copolymers of ethylene and methoxyacetic acid vinyl ester and their use as additives for mineral oil distillates
    Patent number: 4928720
    Abstract: Copolymers consisting of 95 to 50 weight percent of ethylene and 5 to 50 weight percent of methoxyacetic acid vinyl ester and having a molecular mass from 500 to 10,000 g.times.mole .sup.-1. Methods for preparation and use are also disclosed. The copolymers are used as flow improvers for mineral oil distillates, in particular mineral oil middle distillates.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: May 29, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Payer, Heinz D. Buhnen, Wilhelm Zoller
  • Polycarbonate containing aralkylphenyl end groups
    Patent number: 4929709
    Abstract: This invention relates to thermoplastic, aromatic polycarbonates prepared with the aid of chain terminating agents corresponding to formula (I) ##STR1## to a process for the preparation of these polycarbonates and to their use for the production of moulded articles for optical purposes.
    Type: Grant
    Filed: January 25, 1989
    Date of Patent: May 29, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Dujardin, Rolf-Volker Meyer, Wolfgang Siebourg
  • Novel 4,5-disubstituted 1,3-thiazol-2-yloxyacetamide herbicides
    Patent number: 4929743
    Abstract: Herbicidally active novel 4,5-disubstituted 1,3-thiazol-2-yloxyacetamides of the formula ##STR1## in which R.sup.1 is fluorine or chlorine,R.sup.2 is alkyl or halogenoalkyl, andR.sup.3 and R.sup.4 each independently is alkyl, alkenyl, alkinyl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, halogenoalkyl, alkoxyalkyl, alkoxyalkyleneoxy, alkoxy, aralkyl or optionally substituted aryl, orR.sub.3 and R.sub.4, conjointly with the nitrogen atom to which they are bonded form an optionally substituted, heterocyclic ring which can contain further hetero-atoms.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: May 29, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz Forster, Gunther Beck, Erich Klauke, Hans-Joachim Santel, Robert R. Schmidt
  • Hydroxycarboxylic acid/Unsaturated aromatic hydrocarbon resin useful as recording material
    Patent number: 4929710
    Abstract: Hydroxycarboxylic acid derivatives of the formula ##STR1## are particularly suitable for use as color developers in recording materials.
    Type: Grant
    Filed: October 7, 1987
    Date of Patent: May 29, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Scholl, Gert Jabs, Adolf Richartz
  • Shockwave source having a centrally disposed ultrasound locating system
    Patent number: 4928672
    Abstract: A shockwave source of the type wherein a shockwave is generated by rapid electromagnetic repulsion of a membrane by a rapidly energized coil has a central opening extending through the membrane and the coil. An ultrasound head of an ultrasound transmission and reception system is received in the opening. The ultrasound head is disposed in a mount which is rotatable around its longitudinal axis by a rotary drive. In one embodiment of the shockwave source, the shockwave source also has a focusing device disposed in front of the membrane, and in this embodiment the focusing device also has a central opening in which the ultrasound head is received. The ultrasound head has a distal end in contact with a liquid coupling agent for promoting transmission to, and reception from, a patient to which the shockwave source is coupled. The shockwave source is particularly suited for lithotripsy treatment of gallstones.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: May 29, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventors: Franz Grasser, Helmut Reichenberger, Dietrich Hassler, Georg Naser, Erhard Schmidt
  • Process for the preparation of 3-aminophenyl 2-hydroxy-ethyl sulphone
    Patent number: 4929757
    Abstract: 3-Aminophenyl 2-hydroxyethyl sulphone (I) can be prepared in a high yield and purity by treating 2-chloro-5-nitrophenyl 2-hydroxyethyl sulphone (II) or 4-chloro-3-nitrophenyl 2-hydroxyethyl sulphone (III) with hydrogen in the presence of hydrogenation catalysts in an aqueous or aqueous organic medium. (II) is obtained by reducing 2-chloro-5-nitrobenzenesulphochloride with sodium sulphite and subsequently reacting the product with ethylene oxide.
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: May 29, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventor: Karl-Josef Herd
  • Measuring head
    Patent number: 4929084
    Abstract: A measuring head, in particular a manual device for the determination of photometric data, includes an optical illuminating device with an aspherical mirror having a groove which extends in an annular manner around an axis of rotational symmetry of the groove, and which, in cross-section, has the configuration of an elliptical segment. The measuring optics to detect the light reflected from a measuring spot forms a round measuring spot on an ellipse at the inlet slit of a monochromator, for which a spherical/cylindrical lens, a first glass rod and a second glass rod are used, the glass rods being provided with cylindrical surfaces, the associated cylinder axes of which are crossed with each other.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: May 29, 1990
    Assignee: GRETAG Aktiengesellschaft
    Inventors: Fred Mast, Jean A. Knus
  • Mixtures of thermoplastic poly(ester) carbonates with thermoplastic polyurethanes
    Patent number: 4929674
    Abstract: This invention relates to mixtures of thermoplastic aromatic poly(ester)carbonates with thermoplastic polyurethanes containing special graft polymers and, optionally, suitable additives, to a process for their production and to the use of the mixtures according to the invention for the production of moldings, particularly by injection molding or extrusion.
    Type: Grant
    Filed: April 4, 1989
    Date of Patent: May 29, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Werner Nouvertne, Franz-Josef Gielen, Peter Tacke, Ulrich Grigo, Bernd Quiring, Christian Lindner
  • 2-tert-butyl-5-isoxazolylmethylthio-3(2H)-pyridazin-3-one
    Patent number: 4929617
    Abstract: 2-tert-butyl-5-isoxazolylmethylthio-3(2H)-pyridazin-3-one derivatives of the general formula ##STR1## where R.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.2 is hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.2 -C.sub.8 -alkenyl, C.sub.1 -C.sub.4 -haloalkenyl, C.sub.2 -C.sub.8 -alkoxyalkyl, C.sub.3 -C.sub.10 -cycloalkyl, C.sub.2 -C.sub.5 -alkoxycarbonyl, aryl or C.sub.7 -C.sub.20 -aralkyl, or aryl which is monosubstituted, disubstituted or trisubstituted by halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -haloalkoxy, phenyl, phenoxy or cyano and/or monosubstituted or disubstituted by nitro or C.sub.7 -C.sub.20 -aralkyl substituted by the said substituents in the aryl moiety, R.sup.3 is hydrogen, halogen, C.sub.1 -C.sub.8 -alkyl or C.sub.2 -C.sub.8 -alkenyl and X is chlorine or bromine, their preparation and their use for controlling pests.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: May 29, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Joachim Leyendecker, Rainer Buerstinghaus, Hans Theobald, Christoph Kuenast, Peter Hofmeister
  • Polyolefinecarboxylic acids, their preparation and their use for preparing polyolefine-polycarbonate block copolymers
    Patent number: 4929689
    Abstract: The present invention relates to poly-(C.sub.2 -C.sub.10 -.alpha.-olefine)-carboxylic acids of Mw (weight average) 2000 to 350,000, to their preparation by oxidative degradation of polyolefines or by reaction of "Living" polyolefines with CO.sub.2, to their conversion into poly-(C.sub.2 -C.sub.10 -.alpha.-olefine)-carbonyl halides and to their use for preparing polyolefine/polycarbonate block copolymers and the block copolymers obtainable by the process according to the invention.
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: May 29, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Kurt P. Meurer, Helmut Waniczek, Gerd Sylvester, Josef Witte
  • Process for the production of uretdione group-containing compounds, the compounds obtained according to this process and the use thereof in the production of polyurethane plastics material
    Patent number: 4929724
    Abstract: The invention is directed to a process for the production of uretdione group-containing compounds by dimerizing at least a part of the isocyanate groups of organic isocyanates in the presence of compounds containing phosphorus-nitrogen bonds as dimerization catalysts, characterized in that the reaction is carried out in the presence, as co-catalysts, of H-active organic compounds having a pKa-value of at least 6, which have at least one hydrogen atom bound to oxygen, sulphur or nitrogen.The invention also relates to the uretdione group-containing compounds obtained according to this process and to their use for the production of plastics materials according to the isocyanate-polyaddition process.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: May 29, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Theodor Engbert, Jurg Frohlich, Werner Kubitza, Peter Breidenbach, Gerhard Mennicken