Patents by Inventor Hauke Furstenwerth
Hauke Furstenwerth 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).
-
Patent number: 5582621Abstract: Bulk dyeing of plastics using dyestuffs of the formula (I) ##STR1## wherein n denotes 1 or 2, preferably 1,R.sub.o for n=1, denotes aryl, hetaryl or heterocyclylidenemethyl, or for n=2, denotes a direct bond or arylene andthe ring A is unsubstituted or substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, C.sub.6 -C.sub.10 -aryl, C.sub.1 -C.sub.4 -alkyloxy, C.sub.6 -C.sub.10 -aryloxy, C.sub.6 -C.sub.10 -aryl- or C.sub.1 -C.sub.4 -alkylsulphonyl, cyano, halogen, in particular chlorine or bromine, or a radical of the formula --COR.sub.1, wherein R.sub.1 represents C.sub.1 -C.sub.4 -alkoxy, amino, C.sub.1 -C.sub.4 -alkylamino, di-C.sub.1 -C.sub.4 -alkylamino, C.sub.6 -C.sub.10 -arylamino, C.sub.1 -C.sub.4 -alkyl or C.sub.6 -C.sub.10 -aryl, or contains a fused-on aromatic or cycloaliphatic ring,the plastics used being, in particular, thermoplastics, preferably vinyl polymers, polyesters or polyamides.Type: GrantFiled: September 13, 1995Date of Patent: December 10, 1996Assignee: Bayer AktiengesellschaftInventors: Peter Roschger, Stephan Michaelis, Hauke Furstenwerth
-
Patent number: 5420284Abstract: The title compounds of the formula ##STR1## can be prepared by cyclization of aminomethylenated 2-pentenoic acid derivatives of the formula ##STR2## where R, X, R.sup.1, R.sup.2 and Z have the meaning given in the description,in the presence of acids or ammonia. Preferably, aminomethylenated pentenoic acid derivatives are employed which can be prepared from pentenoic acid derivatives of the formulaR--CH.sub.2 --CH.sub.2 --CH.dbd.CH--Z (III)orR--CH.sub.2 --CH.dbd.CH--CH.sub.2 --Z (IV)with ortho-amides of the formula ##STR3## The meanings of A and B are also given in the description.Type: GrantFiled: October 7, 1993Date of Patent: May 30, 1995Assignee: Bayer AktiengesellschaftInventors: Helmut Kraus, Alexander Klausener, Hauke Furstenwerth
-
Patent number: 5328993Abstract: The new cationic triazatrimethine dyestuffs of the formula ##STR1## wherein the substituents B, Z, R.sup.2 and An.sup..crclbar. have the meaning given in the description, are suitable for dyeing and printing naturally occurring and synthetic materials.Type: GrantFiled: April 15, 1993Date of Patent: July 12, 1994Assignee: Bayer AktiengesellschaftInventors: Hauke Furstenwerth, Karl-Heinrich Lange, Roderich Raue, Alfred Brack
-
Patent number: 5250498Abstract: A method of combating unwanted vegetation which comprises applying to such vegetation or to a locus from which it is desired to exclude such vegetation, a herbicidally effective amount of a 2-iminopyridine of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another represent hydrogen, halogen, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylthio or halogenalkylthio,R.sup.Type: GrantFiled: December 7, 1990Date of Patent: October 5, 1993Assignee: Bayer AktiengesellschaftInventors: Roland Andree, Hauke Furstenwerth, Klaus Jelich, Gunther Beck, Peter Babczinski, Klaus Lurssen, Hans-Joachim Santel, Robert R. Schmidt
-
Patent number: 4895957Abstract: A process for the preparation of a 4-substituted 3-methyl-1-aryl-5-amino-pyrazole of the formula ##STR1## in which X.sup.1, X.sup.2 and X.sup.3 independently of one another each stand for halogen andAr stands for optionally substituted phenyl.Type: GrantFiled: December 1, 1988Date of Patent: January 23, 1990Assignee: Bayer AktiengesellschaftInventor: Hauke Furstenwerth
-
Patent number: 4892958Abstract: A process for the preparation of a 5-amino-1-phenyl-4-nitropyrazole of the formula ##STR1## in which Ar is optionally substituted phenyl, which comprises reacting an arylhydrazine of the formulaAr--NH--NH.sub.Type: GrantFiled: December 8, 1988Date of Patent: January 9, 1990Assignee: Bayer AktiengesellschaftInventor: Hauke Furstenwerth
-
Patent number: 4705861Abstract: Benzothiazole derivatives of the formula ##STR1## with the substituent meanings mentioned in the description, are starting compounds for the preparation of new azo dyestuffs. Some methods of preparing the new benzothiazole derivatives are described.Type: GrantFiled: November 14, 1985Date of Patent: November 10, 1987Assignee: Bayer AktiengesellschaftInventors: Hauke Furstenwerth, Karl H. Schundehutte
-
Patent number: 4579805Abstract: Dyes corresponding to formula I may be released imagewise from dye releasers in the dye diffusion transfer process. The dyes obtained are lightfast cyan dyes with improved spectral properties and reduced sensitivity to reducing agents ##STR1## the meanings of symbols given in formula I (A, A', G, R.sup.1, R.sup.2, R.sup.3 and R.sup.4) are indicated in the description.Type: GrantFiled: November 23, 1984Date of Patent: April 1, 1986Assignee: Agfa-Gevaert AktiengesellschaftInventors: Peter Bergthaller, Hauke Furstenwerth, Rudolf Stolzenburg, Paul Marx, Holger Heidenreich
-
Patent number: 4500715Abstract: 1,3,4-Thiazole derivatives of the formula ##STR1## wherein R.sub.26 ' denotes a C.sub.1 -C.sub.8 -alkyl radical which is optionally substituted by hydroxyl, halogen, cyano, C.sub.1 -C.sub.4 -alkoxy, carboxyl, aminocarbonyl or C.sub.1 -C.sub.4 -alkoxycarbonyl, a C.sub.2 -C.sub.4 -alkenyl radical, a cyclohexyl radical which is optionally substituted by C.sub.1 -C.sub.4 -alkyl, a phenyl, benzyl or phenylethyl radical which is optionally substituted by halogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, a C.sub.1 -C.sub.2 -alkylcarbonyl, C.sub.1 -C.sub.4 -alkoxycarbonyl, mono- or di-C.sub.1 -C.sub.4 -alkylaminocarbonyl, aminocarbonyl, mono- or di-C.sub.1 -C.sub.4 -alkylaminosulphonyl, 2-thienyl, 2-furyl, 2-tetrahydrofuryl, amino, C.sub.1 -C.sub.4 -alkylamino or di-(C.sub.1 -C.sub.4 -alkyl)-amino radical or a phenylamino or benzylamino radical which is optionally substituted by C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy and R.sub.27 ' denotes a C.sub.1 -C.sub.Type: GrantFiled: January 26, 1981Date of Patent: February 19, 1985Assignee: Bayer AktiengesellschaftInventor: Hauke Furstenwerth
-
Patent number: 4432897Abstract: The cationic triazene dyestuffs of the general formula ##STR1## wherein B denotes alkylmercapto, arylmercapto or a radical of the formula ##STR2## R denotes hydrogen or an alkyl, alkenyl, acyl, cycloalkyl, aryl, aralkyl, amino, alkylamino, dialkylamino, arylamino, aralkylamino or heterocyclic radical andR.sub.1 denotes hydrogen or an alkyl, alkenyl or aralkyl radical, orR and R.sub.1 are bonded to a heterocyclic structure,R.sub.2 and R.sub.3 denote an alkyl, alkenyl, alkinyl or aralkyl radical, or one of the radicals R.sub.2 or R.sub.3 also denotes hydrogen, orR.sub.3 is bonded to the o-position of A,A denotes an aryl radical andAn.sup.(-) denotes an anion,and wherein the cyclic and acyclic radicals can contain non-ionic substituents and/or a carboxyl group, can be used for dyeing and printing natural and synthetic materials.Type: GrantFiled: November 16, 1981Date of Patent: February 21, 1984Assignee: Bayer AktiengesellschaftInventor: Hauke Furstenwerth
-
Patent number: 4268438Abstract: Cationic 1,3,4-thiadiazole dyestuffs of the general formula ##STR1## wherein R denotes hydrogen or an alkyl, alkenyl, acyl, cycloalkyl, aryl, aralkyl, amino, alkylamino, dialkylamino, arylamino, aralkylamino or heterocyclic radical andR.sub.1 denotes hydrogen or an alkyl, alkenyl or aralkyl radical, orR and R.sub.1 are linked to form a heterocyclic ring, with the condition that if R denotes aryl, R.sub.1 cannot be hydrogen.R.sub.2 denotes an alkyl, alkenyl, alkinyl or aralkyl radical,K denotes a radical of a coupling component and An.sup.(-) denotes an anion,are suitable for the dyeing and printing of natural and synthetic materials, in particular of polyacrylnitrile and acid-modified polyesters and polyamides.Type: GrantFiled: March 13, 1979Date of Patent: May 19, 1981Assignee: Bayer AktiengesellschaftInventor: Hauke Furstenwerth