Patents Assigned to Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
  • Patent number: 4408064
    Abstract: Novel bis-(silylethyl)-oligosulphides are obtained by reacting a vinyl silane of the formula (CH.sub.2 .dbd.CH).sub.m -SiR.sub.n.sup.1 R.sub.4-(m+n) in which R represents chlorine, bromine, iodine, C.sub.1 -C.sub.3 -alkoxy, 2-methoxyethoxy, 2-ethoxyethoxy or hydroxy, R.sup.1 represents C.sub.1 -C.sub.3 -alkyl, phenyl or C.sub.5 -C.sub.7 -cycloalkyl, n is 0, 1 or 2, m is 1 or 2 and m+n is 1, 2 or 3 with sulphur as well as in a given case hydrogen sulphide in molar ratios of vinyl silane to sulphur of from 1:2.5 to 1:10 and vinyl silane to hydrogen sulphide of from 1:0 to 1:5 at temperatures between about 100.degree. and 200.degree. C. under pressure of from 1 to 25 bars (total pressure at the reaction temperature) and in the presence of sulphidation catalysts known per se, in a given case followed by hydrolysis or partial hydrolysis of the reaction products.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: October 4, 1983
    Assignee: Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler
    Inventors: Rudolf Schwarz, Peter Kleinschmit, Christa Liedtke, Siegfried Wolff
  • Patent number: 4402733
    Abstract: Herbicidally active derivatives of the formula ##STR1## in which R represents methyl, ethyl or n-propyl.
    Type: Grant
    Filed: April 20, 1981
    Date of Patent: September 6, 1983
    Assignees: Ciba-Geigy Corporation, Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Georg Pissiotas, Willy Meyer, Werner Schwarze, Herbert Klenk, Wolfgang Leuchtenberg
  • Patent number: 4379871
    Abstract: There is disclosed a process for the production of a pigment-synthetic resin concentrate containing an organic solvent soluble polymer and carbon black having quicker distributability in organic media such as lacquer binding media, printing inks, etc., such concentrates being especially suitable for the production of molded parts, castings, films and/or synthetic fibers, the process comprising continuously homogenizing in a mixer powdery pigment and powdery synthetic resin jointly with an organic solvent in a given case also containing plasticizer, stabilizer and/or dispersing acid, dispersing the pigment in the mixture, removing the solvent from the dispersion, comminuting the resulting pigment-synthetic resin concentrated and grinding the product.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: April 12, 1983
    Assignee: Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler
    Inventors: Peter Werle, Hans Graf, Erwin Walter
  • Patent number: 4353208
    Abstract: An exhaust gas purification apparatus for an internal combustion engine including a catalyst chamber containing a catalyst composition for the catalytic conversion of harmful substances contained in the exhaust gases wherein the interior wall of the exhaust pipe connecting the engine with the catalyst chamber is provided with a catalytically active coating for at least a portion of its length.
    Type: Grant
    Filed: August 19, 1980
    Date of Patent: October 12, 1982
    Assignee: Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler
    Inventors: Herbert Volker, Polat ser
  • Patent number: 4340490
    Abstract: Waste water containing phenol, phenol derivatives or phenol plus formaldehyde is purified by treating the waste water with hydrogen peroxide and either iron, copper or the complex salt sodium iron (III) ethylenediamine tetraacetate.
    Type: Grant
    Filed: December 20, 1977
    Date of Patent: July 20, 1982
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Helmut Junkermann, Horst Kruger
  • Patent number: 4332940
    Abstract: 2,3-Cycloalkenopyridines of the formula ##STR1## are prepared by reacting a cycloalkanone or cycloalkenone of the formula ##STR2## with an oxo compound of the formula ##STR3## where Z is an aliphatic carbon chain which is unsubstituted or has hydrocarbon substituents and R.sub.1, R.sub.2 and R.sub.3 are hydrogen or lower alkyl groups and ammonia in the presence of a dehydrating and dehydrogenating catalyst at a temperature of about 250.degree. to 550.degree. C.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: June 1, 1982
    Assignee: Deutsche Gold -und Silber-Scheideanstalt Vormals Roessler
    Inventors: Helmut Beschke, Heinz Friedrich, Heribert Offermanns
  • Patent number: 4322250
    Abstract: Mastic asphalt mixture for road, building and industrial construction, which contains 0.1 to 2% by weight of silica. For example, a precipitated silica, a precipitated and spray dried, or a pyrogenously produced silica may be used as a synthetic silicic acid. The content of synthetic silica produces an essentially higher degree of hardness in the finished mastic asphalt layer.
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: March 30, 1982
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Karl-Hans Muller, Walter Barthel
  • Patent number: 4318894
    Abstract: Baffle means coated with effective catalyts are positioned inside exhaust pipes to convert the harmful substances in said exhaust gases into harmless components. The baffle means impart a disturbed flow and/or change of the direction of flow of the exhaust gases in the exhaust pipe.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: March 9, 1982
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Jorg Hensel, Edgar Koberstein, Alfred Bozon, Martin H. Volker
  • Patent number: 4308673
    Abstract: There are provided thermoplastic or through the action of solvent shapable, shoe stiffening and likewise non-slip inner material for the heel region in the form of continuous sheets or blanks consisting of an embedded fiber structure which is loaded or filled with at least one synthetic resin acting as a stiffening agent at normal temperature up to about 60.degree. C. in an amount of 0.1 to 0.9 kg per square meter fiber structure in the course of which the loading in a given case can contain fillers, dyestuffs, pigments, plasticizers, propellants, stabilizers, processing aids and/or extenders in the customary amounts.
    Type: Grant
    Filed: June 26, 1979
    Date of Patent: January 5, 1982
    Assignee: Deutsche Gold-und Silber-Scheideanstalt Vormals Roessler
    Inventor: Olaf Mobius
  • Patent number: 4308074
    Abstract: Finely divided precipitated silicic acid is obtained by the method of the invention.Compositions containing the finely divided precipitated silicic acid as a filler distributed in an elastomer such as an organopolysiloxane are disclosed.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: December 29, 1981
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Peter Nauroth, Heinz Esch, Robert Kuhlmann, Rudolf Bode, Arthur Reisert, Harald Buhler, Gunter Turk
  • Patent number: 4303621
    Abstract: Methionine and potassium are recovered from the recycling solution of the potassium carbonate-methionine process by concentrating the mother liquor after the methionine precipitation and with cooling carbonating the mother liquor.
    Type: Grant
    Filed: August 1, 1978
    Date of Patent: December 1, 1981
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Theodor Lussling, Klaus-Peter Muller, Gerd Schreyer, Ferdinand Theissen
  • Patent number: 4300391
    Abstract: There is provided a hot wire anemometer for measuring the flow velocity of gases and liquids, especially for the intake air of internal combustion engines, with one or more temperature dependent resistances of which one or more are heated wherein there is applied to the side of the heated resistance in the direction of flow a heat insulating coating.
    Type: Grant
    Filed: June 15, 1979
    Date of Patent: November 17, 1981
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventor: Kurt Eiermann
  • Patent number: 4299725
    Abstract: Aqueous media having a dissolved content of a small amount, (less than 100 p.p.m.) of a mixture of aminoalkanols of the formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent H and C.sub.1-18 unbranched alkyl substituents (the sum of the carbon atoms in R.sub.1 and R.sub.2 being 9 to 18), R.sub.3 and R.sub.4 each represent H,C.sub.1-4 alkyl and C.sub.2-4 hydroxyalkyl substituents, x represents 2 to 6, and y represents 0 to 1, the ##STR2## units in the aminoalkanols being of at least two different chain lengths in the range of 11 to 20 carbon atoms, possess decreased tendency to corrode iron-containing metals including steel. The mixtures are also useful in salt form. The efficiency of the mixture is improved by various additives which act synergistically therewith.
    Type: Grant
    Filed: March 10, 1978
    Date of Patent: November 10, 1981
    Assignees: Henkel Kommanditgesellschaft auf Aktien, Deutsche Gold- und Silber Scheideanstalt vormals Roessler
    Inventors: Volker Wehle, Wolfgang Rupilius, Jurgen Reiffert, Gabriele Rogall
  • Patent number: 4294726
    Abstract: A three-way catalyst is described for the purification of automobile exhaust gases formed of an active substance of platinum and rhodium and possibly base metal(s) at a certain weight ratio between the two noble metals and at a certain atomic ratio between the noble and the base metal, which are precipitated onto active aluminum oxide containing certain quantities of CeO.sub.2, ZrO.sub.2 and Fe.sub.2 O.sub.3, and whereby the catalyst is obtained by impregnating active aluminum oxide, possibly stabilized with alkaline earth metal, with a solution of cerium, zirconium and iron salt which is thereupon calcined in air at 500.degree.-700.degree. C. and then treated after application of an impregnation of salts of the active substance components in a gas current containing hydrogen at temperatures below 650.degree. C.
    Type: Grant
    Filed: February 11, 1980
    Date of Patent: October 13, 1981
    Assignee: Deutsche Gold-und Silber-Scheideanstalt vormals Roessler
    Inventors: Alfred Bozon, Edgar Koberstein, Hans-Dieter Pletka, Herbert Volker, Eduard Lakatos
  • Patent number: 4292291
    Abstract: There is set forth a process for the production of furnace black comprising spraying an oily carbon black forming material into a stream of hot combustion gases produced by reaction of fuel with reaction air, chilling and recovery of the carbon black by separation from the waste gases during which the reaction air is heated by means of waste gases. The waste gases are burned in a combustion apparatus by means of secondary air in order to heat the reaction air to a temperature between 600.degree. and 1,250.degree. C., preferably between 800.degree. and 1100.degree. C. and the thus heated reaction air is then introduced into the process.
    Type: Grant
    Filed: June 15, 1979
    Date of Patent: September 29, 1981
    Assignee: Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler
    Inventors: Lothar Rothbuhr, Josef Witte
  • Patent number: 4287094
    Abstract: The invention relates to coordination compounds of rhodium with silicon-substitued dialkyl or diaryl sulfide groups as ligands in monomeric, polymeric or carrier-fixed forms. The substance can be used as catalysts.
    Type: Grant
    Filed: August 2, 1979
    Date of Patent: September 1, 1981
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Peter Panster, Wolfgang Buder, Peter Kleinschmit
  • Patent number: 4283337
    Abstract: Tryptophane and tryptophane derivatives are purified by treating them in an inert solvent at a temperature between about 20.degree. C. and the boiling point of the mixture with a salt of dithionous acid. Preferably there is used as solvent a mixture of water and a lower aliphatic carboxylic acid. Normally a single treatment results in a pure, colorless, satisfactory product.
    Type: Grant
    Filed: November 15, 1979
    Date of Patent: August 11, 1981
    Assignee: Deutsche Gold und- Silber-Scheideanstalt Vormals Roessler
    Inventors: Theodor Lussling, Alfred Maierhofer, Paul Scherberich
  • Patent number: 4282198
    Abstract: High quality carbon black forming material convertible with high yield into furnace black having a high abrasion resistance in rubber is prepared by dissolving pitch with conventional thinly liquid carbon black feed stock and mechanically separating suspended matter from the mixture obtained.
    Type: Grant
    Filed: January 4, 1980
    Date of Patent: August 4, 1981
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Lothar Rothbuhr, Werner Sroka, Walter Fritz
  • Patent number: 4280914
    Abstract: In the detoxification of waste waters containing nitrite ions by means of hydrogen peroxide the addition of hydrogen peroxide is automatically controllable by adding the hydrogen peroxide continuously or in portions with continuous measurement of the pH and stopping the addition when no further reduction of the pH is caused by it. By control of the hydrogen peroxide addition through the change of the pH it is guaranteed that sufficient hydrogen peroxide is added to reach a complete detoxification of the waste water while on the other hand there is not wasted hydrogen peroxide unnecessarily.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: July 28, 1981
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Helmut Knorre, Joachim Fischer
  • Patent number: RE31071
    Abstract: There are produced 6-aza-3H-1,4-benzodiazepines and 6-aza-1,2-dihydro-3H-1,4-benzodiazepines of the formula ##STR1## where R.sub.1 is a halogen, R.sub.2 and R.sub.3 are hydrogen, halogen, trifluoromethyl, nitro, nitrile, hydroxy, lower alkyl, lower alkoxy, R.sub.4 is hydrogen, hydroxyl, hydroxyl acylated with a mono or dicarboxylic aid of 2 to 6 carbon atoms, lower alkoxy, lower alkyl, benzyl, lower aliphatic acyl, carboxy or carb-lower alkoxy, Z is nitrogen or NO, R.sub.5 is hydrogen, lower alkyl, lower alkyl substituted with cycloalkyl of 3 to 6 carbon atoms, lower alkenyl, cycloalkyl of 3 to 6 carbon atoms, lower hydroxyalkyl, benzyl, aliphatic acyl of 2 to 6 carbon atoms aminoalkyl of 2 to 7 carbon atoms, mono or di lower alkyl substituted aminoalkyl of 2 to 7 carbon atoms, lower alkyl substituted with 5 to 7 membered N-heterocyclic ring, containing 0 to 1 additional nitrogen or oxygen atoms, and A is oxygen, sulfur, .dbd.NR.sub.5, .dbd.NOR.sub.5, .dbd.NH--NHR.sub.5 or two hydrogen atoms and the --N(R.
    Type: Grant
    Filed: September 1, 1981
    Date of Patent: November 2, 1982
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Walter von Bebenburg, Heribert Offermanns