Patents by Inventor Henry Giera
Henry Giera has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6414192Abstract: The invention provides a process for preparing 4-aminodiphenylamine, an important starting product for synthesizing antioxidants and stabilizers in the rubber and polymer industry, by hydrogenating nitrosobenzene with hydrogen in the presence of a proton acid as catalyst and in the presence of a hydrogenating catalyst, optionally in the presence of an inert organic solvent and thermally decomposing the 4-ADPA ammonium salt produced in this way, wherein 4-ADPA is obtained. 4-aminodiphenylamine is produced in good yields and high purity by the process according to the present invention. Furthermore, no effluent is produced, which makes the process particularly economic and ecological.Type: GrantFiled: November 6, 2001Date of Patent: July 2, 2002Assignee: Bayer AktiengesellschaftInventors: Michael Schelhaas, Carl Casser, Dietmar Bielefeldt, Pieter Ooms, Joachim Haider, Manfred Jautelat, Christian Laue, Henry Giera
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Publication number: 20020055652Abstract: The invention provides a process for preparing 4-aminodiphenylamine, an important starting product for synthesizing antioxidants and stabilizers in the rubber and polymer industry, by hydrogenating nitrosobenzene with hydrogen in the presence of a proton acid as catalyst and in the presence of a hydrogenating catalyst, optionally in the presence of an inert organic solvent and thermally decomposing the 4-ADPA ammonium salt produced in this way, wherein 4-ADPA is obtained.Type: ApplicationFiled: November 6, 2001Publication date: May 9, 2002Inventors: Michael Schelhaas, Carl Casser, Dietmar Bielefeldt, Pieter OOms, Joachim Haider, Manfred Jautelat, Christian Laue, Henry Giera
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Patent number: 6316673Abstract: The present invention relates to the production of aminodiphenyl-amines resulting in good yields and high purity levels when aromatic amines are reacted with nitrohalobenzenes in the presence of a palladium catalyst and a base and the product thus obtained is subsequently hydrogenated with hydrogen.Type: GrantFiled: February 2, 2001Date of Patent: November 13, 2001Assignee: Bayer AktiengesellschaftInventors: Henry Giera, Torsten Pohl, Uwe Hugger, Adolf Sicheneder, Fred Schuhmacher, Adolf Brill
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Patent number: 6303820Abstract: The invention relates to a process for the preparation of nitrosobenzenes from aromatic amines by oxidation with hydrogen peroxide in the presence of sodium molybdate dihydrate and an inert organic solvent.Type: GrantFiled: November 6, 2000Date of Patent: October 16, 2001Assignee: Bayer AktiengesellschaftInventors: Henry Giera, Walter Lange, Michaela Meiers, Raul Pires
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Patent number: 6274775Abstract: The invention relates to a process for the preparation of nitrosobenzene from aromatic amines by oxidation with hydrogen peroxide in the presence of a catalyst based on compounds of tungsten and/or molybdenum without the addition of the organic solvents conventionally used.Type: GrantFiled: November 6, 2000Date of Patent: August 14, 2001Assignee: Bayer AktiengesellschaftInventors: Henry Giera, Michaela Meiers, Uwe Hugger
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Publication number: 20010012906Abstract: The present invention relates to the production of aminodiphenyl-amines resulting in good yields and high purity levels when aromatic amines are reacted with nitrohalobenzenes in the presence of a palladium catalyst and a base and the product thus obtained is subsequently hydrogenated with hydrogen.Type: ApplicationFiled: February 2, 2001Publication date: August 9, 2001Inventors: Henry Giera, Torsten Pohl, Uwe Hugger, Adolf Sicheneder, Fred Schuhmacher, Adolf Brill
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Patent number: 6235937Abstract: The invention relates to a process for the preparation of nitrodiphenylamines by reaction of nitrohalogenobenzenes with aromatic amines in the presence of a palladium catalyst and a base, the base being ground and/or dried before its use.Type: GrantFiled: August 31, 2000Date of Patent: May 22, 2001Assignee: Bayer AktiengesellschaftInventors: Henry Giera, Walter Lange, Torsten Pohl, Adolf Sicheneder, Christoph Schild
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Patent number: 6207671Abstract: The cycloalkano-pyridines are prepared by reacting corresponding cycloalkano-pyridine-aldehydes with suitable organometallic compounds or Wittig or Grignard reagents or reacting compounds of the cycloalkano-pyridine alcohols type with suitable bromine compounds, and optionally varying the functional groups accordingly. The cycloalkanopyridines are suitable as active compounds in medicaments, in particular in medicaments for the treatment of hypertipoproteinaemia and arteriosclerosis.Type: GrantFiled: March 8, 2000Date of Patent: March 27, 2001Assignee: Bayer AktiengesellschaftInventors: Gunter Schmidt, Arndt Brandes, Rolf Angerbauer, Michael Lögers, Matthias Müller-Gliemann, Carsten Schmeck, Klaus-Dieter Bremm, Hilmar Bischoff, Delf Schmidt, Joachim Schuhmacher, Henry Giera, Holger Paulsen, Paul Naab, Michael Conrad, Jürgen Stoltefuss
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Patent number: 6166256Abstract: The present invention provides a process for preparing (4-nitroso-phenyl)phenyl-hydroxylamine which is characterized in that nitrobenzene is reacted in the presence of hydroxide and/or oxide-containing bases, optionally in the presence of solvents, at temperatures of 20 to 180.degree. C. and pressures of 0.1 to 10 bar.The process according to the invention has the particular advantage that it uses inexpensive and cost-effective nitrobenzene as starting material instead of the nitrosobenzene conventionally used hitherto.Type: GrantFiled: May 8, 2000Date of Patent: December 26, 2000Assignee: Bayer AktiengesellschaftInventors: Henry Giera, Carl Casser, Pieter Ooms, Michael Schelhaas, Christian Laue, Michaela Meiers, Gerhard Braun
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Patent number: 6069148Abstract: The cycloalkano-pyridines are prepared by reacting corresponding cycloalkano-pyridine-aldehydes with suitable organometallic compounds or Wittig or Grignard reagents or reacting compounds of the cycloalkano-pyridine alcohols type with suitable bromine compounds, and optionally varying the functional groups accordingly. The, cycloalkanopyridines are suitable as active compounds in medicaments, in particular in medicaments for the treatment of hyperlipoproteinaemia and arteriosclerosis.Type: GrantFiled: July 8, 1997Date of Patent: May 30, 2000Assignee: Bayer AktiengesellschaftInventors: Gunter Schmidt, Arndt Brandes, Rolf Angerbauer, Michael Logers, Matthias Muller-Gliemann, Carsten Schmeck, Klaus-Dieter Bremm, Hilmar Bischoff, Delf Schmidt, Joachim Schuhmacher, Henry Giera, Holger Paulsen, Paul Naab, Michael Conrad, Jurgen Stoltefuss
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Patent number: 5869731Abstract: There has been found1) a method for reducing the toxicity of spent liquors from dyeing with cationic dyes or mixtures thereof, characterized by the step of dyeing with cationic dyes having a computed electrostatic shielding energy (idealized hydration energy) of .gtoreq.50 kcal/mol,2) cationic, generally low toxicity dyes, their preparation and use for dyeing.Type: GrantFiled: September 25, 1997Date of Patent: February 9, 1999Assignee: Bayer AktiengesellschaftInventors: Henry Giera, Felix Reichel, Horst Berneth
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Patent number: 5866353Abstract: A variety of diazacyanine mediators that are soluble in aqueous media and which do not inhibit enzymatic activity are provided for use on the surface of a working electrode of a electrochemical biosensor for electrochemical co-enzyme regeneration. The co-enzyme, dihydronicotinamide adenine dinucleotide (NADH) or dihydronicotinamide adenine dinucleotide phosphate (NADPH), is oxidized to NAD.sup.+ OR NADP.sup.+ which is reduced by an oxidoreductase such as a dehydrogenase acting on a substrate. By applying the mediator together with NADH or NADPH to the surface of the working electrode, the voltage necessary to achieve oxidation is substantially reduced. Biosensor electrodes such as graphite electrodes may be produced-by screen printing techniques.Type: GrantFiled: December 9, 1996Date of Patent: February 2, 1999Assignee: Bayer CorporationInventors: Horst Berneth, Thomas Bocker, Henry Giera, Alison J. Murray, Hans-Ulrich Siegmund
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Patent number: 5749925Abstract: 4,5-Dihydro-1H-1,2,3-triazolium compounds of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 independently of one another denote C.sub.6 -C.sub.14 -aryl or a heterocyclic radical having up to 3 rings and up to 4 heteroatoms from the series consisting of O, S and N,R.sup.3 and R.sup.4 independently of one another denote hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.2 -C.sub.12 -alkenyl, C.sub.4 -C.sub.8 -cycloalkyl, C.sub.7 -C.sub.17 -aralkyl, C.sub.6 -C.sub.14 -aryl or nitrile orR.sup.3 and R.sup.4 together denote a 2- to 5-membered C bridge, which can optionally be interrupted by up to two oxygen and/or nitrogen atoms, andX.sup.- denotes an anion,wherein all the alkyl, alkenyl, cycloalkyl, aralkyl and aryl radicals and fused and heterocyclic radicals present can optionally be substituted by nonionic substituents, carboxyl groups, ammonium groups and/or pyridinium groups, are used as dyestuffs.New 4,5-dihydro-1H-1,2,3-triazolium compounds correspond to the formula (I), with the provisos that if R.sup.Type: GrantFiled: June 26, 1996Date of Patent: May 12, 1998Assignee: Bayer AktiengesellschaftInventors: Thomas Bocker, Horst Berneth, Henry Giera
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Patent number: 5725607Abstract: There has been found1) a method for reducing the toxicity of spent liquors from dyeing with cationic dyes or mixtures thereof, characterized by the step of dyeing with cationic dyes having a computed electrostatic shielding energy (idealized hydration energy) of .gtoreq.50 kcal/mol,2) cationic, generally low toxicity dyes, their preparation and use for dyeing.Type: GrantFiled: June 25, 1996Date of Patent: March 10, 1998Assignee: Bayer AktiengesellschaftInventors: Henry Giera, Felix Reichel, Horst Berneth, Thomas Bocker, Karin Hassenruck, Karl Lange, Karlheinrich Meisel