Patents by Inventor Peter Heitkamper
Peter Heitkamper 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: 6784219Abstract: The present invention relates to polyurethane cast elastomers which are prepared from higher molecular weight polyhydroxy compounds, durene diisocyanate and low molecular weight chain-lengthening and/or crosslinking agents. These elastomers are particularly useful for the production of moldings exposed to high mechanical stresses.Type: GrantFiled: January 15, 2000Date of Patent: August 31, 2004Assignee: Bayer AktiengesellschaftInventors: Peter Heitkämper, Klaus Jost, Eduard Mayer, Thomas Münzmay, Joachim Wagner, Christian Wolfrum
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Publication number: 20030135008Abstract: The present invention relates to polyurethane cast elastomers which are prepared from higher molecular weight polyhydroxy compounds, durene diisocyanate and low molecular weight chain-lengthening and/or crosslinking agents. These elastomers are particularly useful for the production of moldings exposed to high mechanical stresses.Type: ApplicationFiled: January 15, 2000Publication date: July 17, 2003Inventors: Peter Heitkamper, Klaus Jost, Eduard Mayer, Thomas Munzmay, Joachim Wagner, Christian Wolfrum
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Patent number: 6486346Abstract: Durene diisocyanate is prepared by reacting durene with nitric acid in sulfuric acid, catalytic hydrogenation of the dinitrodurene that is formed, and phosgenation of the resultant durene diamine in a conventional manner. The intermediate products dinitrodurene and durene diamine do not have to be worked up in a complicated manner as solid products, but can be worked up in dissolved form. The intermediate products dinitrodurene and durene diamine do not have to be isolated and purified in a complicated manner. but can be processed directly after preparation. Another advantage of this process is that only a single organic solvent need be used for the overall preparation process. Separation and re-use of spent acid in the conversion of durene with nitric acid also renders the process of the present invention significantly less environmentally harmful than the known processes of the prior art.Type: GrantFiled: December 14, 1999Date of Patent: November 26, 2002Assignee: Bayer AktiengesellschaftInventors: Peter Heitkämper, Klaus Jost, Stefan Penninger
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Patent number: 6428895Abstract: The present invention relates to composite materials made of at least one composite layer of a polyurethane and of a second composite layer which is directly bonded to the first layer and which consists of a thermoplastic material that is different from the polyurethane of layer A). The polyurethane material of layer A) is characterized by a residual content of free reaction components containing ether groups of no more than 400 ppm, and preferably of no more than 100 ppm. The invention also relates to a process for the production of these composite materials and to a method of their use as materials in motor vehicles.Type: GrantFiled: July 31, 2001Date of Patent: August 6, 2002Assignee: Bayer AktiengesellschaftInventors: Karsten Reihs, Werner Rasshofer, Holger Warth, Dirk Wegener, Manfred Schmidt, Peter Heitkämper
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Publication number: 20020025438Abstract: The present invention relates to composite materials made of at least one composite layer of a polyurethane and of a second composite layer which is directly bonded to the first layer and which consists of a thermoplastic material that is different from the polyurethane of layer A). The polyurethane material of layer A) is characterized by a residual content of free reaction components containing ether groups of no more than 400 ppm, and preferably of no more than 100 ppm. The invention also relates to a process for the production of these composite materials and to a method of their use as materials in motor vehicles.Type: ApplicationFiled: July 31, 2001Publication date: February 28, 2002Inventors: Karsten Reihs, Werner Rabhofer, Holger Warth, Dirk Wegener, Manfred Schmidt, Peter Heitkamper
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Patent number: 6296908Abstract: The present invention relates to composite materials made of at least one composite layer of a polyurethane and of a second composite layer which is directly bonded to the first layer and which consists of a thermoplastic material that is different from the polyurethane of layer A). The polyurethane material of layer A) is characterized by a residual content of free reaction components containing ether groups of no more than 400 ppm, and preferably of no more than 100 ppm. The invention also relates to a process for the production of these composite materials and to a method of their use as materials in motor vehicles.Type: GrantFiled: May 16, 2000Date of Patent: October 2, 2001Assignee: Bayer AktiengesellschaftInventors: Karsten Reihs, Werner Rasshofer, Holger Warth, Dirk Wegener, Manfred Schmidt, Peter Heitkämper
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Patent number: 6054528Abstract: The present invention relates to aqueous compositions containinga) bis(1,3,4-oxadiazolin-5-ones) corresponding to formula (I) ##STR1## wherein R represents a single bond or a divalent aliphatic, araliphatic or aromatic radical having 1 to 18 carbon atoms andb) organic polyamines or polyamine blends having an average of more than 2 NH-- and/or NH.sub.2 -- groups.The present invention also relates to coatings, adhesives or sealants prepared from these aqueous compositions, in particular automotive clear coats.Type: GrantFiled: July 17, 1998Date of Patent: April 25, 2000Assignee: Bayer AktiengesellschaftInventors: Josef Pedain, Klaus Konig, Peter Heitkamper, Manfred Schonfelder
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Patent number: 5663439Abstract: The present invention relates to an improved process for the preparation of toluidines. This process comprises the reductive deamination of 2,3-diaminotoluenes and/or 3,4-diaminotoluenes in the presence of one or more iron oxide catalyst.Type: GrantFiled: August 15, 1996Date of Patent: September 2, 1997Assignee: Bayer AktiengesellschaftInventors: Stefan Penninger, Peter Heitkamper
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Patent number: 5467394Abstract: To improve the anti-sidetone of electro-acoustic installations, particularly to improve the intercom characteristics of a telecommunication terminal, with compander control by an echo evaluation circuit (52) assigned to the compander (4), the latter has an echo compensator (40) located upstream, and/or a voice-controlled balance (51) is located downstream of the compander (4), which are controlled by the echo evaluation circuit (52) of the compander (4). To control the echo compensator (40) and/or the voice-controlled balance (51), the usual control circuitry required for their operation can be omitted. The result is a particularly effective, economical method with very good intercom characteristics.Type: GrantFiled: February 16, 1994Date of Patent: November 14, 1995Assignee: Alcatel N.V.Inventors: Michael Walker, Peter Heitkamper
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Patent number: 5371271Abstract: Fungicidal substituted aminophenyl carbamates of the formula ##STR1## in which X represents --CO--NR.sup.8 R.sup.9 ; --CO--OR.sup.9 ; --CO--SR.sup.9 ; --CO--R.sup.10 ; --SO.sub.2 R.sup.9 or hydrogen, in whichR.sup.8 represents hydrogen or alkyl,R.sup.9 represents optionally substituted aryl, optionally substituted aralkyl, optionally substituted alkyl, alkenyl, halogenoalkenyl, or in each case optionally substituted cycloalkyl, cycloalkenyl or cycloalkylalkyl, and R.sup.10 has the meaning of R.sup.9 or represents an optionally substituted heterocyclic ring,Y.sup.1 to Y.sup.4 are identical or different and represent hydrogen, halogen, nitro, cyano, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylthio, alkylsulfonyl or halogenolkylthio,R.sup.1 to R.sup.Type: GrantFiled: August 18, 1993Date of Patent: December 6, 1994Assignee: Bayer AktiengesellschaftInventors: Bernd-Wieland Kruger, Klaus Sasse, Peter Heitkamper, Klaus Konig, Wilhelm Brandes, Gerd Hanssler, Albrecht Marhold
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Patent number: 5359653Abstract: A circuit arrangement for dynamic control of a voice terminal apparatus contains a compander function. Instead of analog circuits for dynamic expander and compressor, a digital signal processor (DSP) is employed which, via a prestored characteristic (KL), assigns to individual average level values of the input signal, amplification factors which are fed to the amplifier (VS) located in the send path of the terminal apparatus. The stored characteristic can be shifted or replaced by another characteristic as a function of a noise average value, or from a receive average value obtained from the audible feedback signal. Thus, an amplification change in the send path is compensated in its action upon the audible feedback signal arriving via the receive path. In a further development, the circuits delivering the level average values are replaced by the digital signal processor, which carries out the functions assigned to these circuits by means of subprograms.Type: GrantFiled: September 9, 1992Date of Patent: October 25, 1994Assignee: Alcatel N.V.Inventors: Michael Walker, Peter Heitkamper
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Patent number: 5260474Abstract: Fungicidal substituted aminophenyl carbamates of the formula ##STR1## in which X represents --CO--NR.sup.8 R.sup.9 ; --CO--OR.sup.9 ; --CO--SR.sup.9 ; --CO--R.sup.10 ; --SO.sub.2 R.sup.9 or hydrogen, in whichR.sup.8 represents hydrogen or alkyl,R.sup.9 represents optionally substituted aryl, optionally substituted aralkyl, optionally substituted alkyl, alkenyl, halogenoalkenyl, or in each case optionally substituted cycloalkyl, cycloalkenyl or cycloalkylalkyl, and R.sup.10 has the meaning of R.sup.9 or represents an optionally substituted heterocyclic ring,Y.sup.1 to Y.sup.4 are identical or different and represent hydrogen, halogen, nitro, cyano, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylthio, alkylsulfonyl or halogenoalkylthio,R.sup.1 to R.sup.Type: GrantFiled: March 16, 1992Date of Patent: November 9, 1993Assignee: Bayer AktiengesellschaftInventors: Bernd-Wieland Kruger, Klaus Sasse, Peter Heitkamper, Klaus Konig, Wilhelm Brandes, Gerd Hanssler, Albrecht Marhold
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Patent number: 5130466Abstract: The present invention is directed to a diisocyanate which corresponds to the formula ##STR1## The present invention is also directed to the preparation of this diisocyanate and to its use for the production of polyisocyanate polyaddition products.Type: GrantFiled: January 11, 1990Date of Patent: July 14, 1992Assignee: Bayer AktiengesellschaftInventors: Manfred Schmidt, Klaus Konig, Peter Heitkamper, Josef Pedain
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Patent number: 4952701Abstract: A process for the preparation of 4-amino-1,2,4-triazol-5-one of the formula ##STR1## in which R is alkyl, comprising in a first step reacting phosgene with an acylhydrazide of the formula ##STR2## to produce an oxadiazolinone of the formula ##STR3## and in a second step reacting the oxadiazolinone with hydrazine hydrate.Type: GrantFiled: December 15, 1988Date of Patent: August 28, 1990Assignee: Bayer AktiengesellschaftInventors: Klaus-Helmut Muller, Klaus Konig, Peter Heitkamper
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Patent number: 4939170Abstract: Fungicidal substituted aminophenyl carbamates of the formula ##STR1## in which X represents --CO--NR.sup.8 R.sup.9 ; --CO--OR.sup.9 ; --CO--SR.sup.9 ; --CO.sup.R.sup.10 ; --SO.sub.2 R.sup.9 or hydrogen, in whichR.sup.8 represents hydrogen or alkyl,R.sup.9 represents optionally substituted aryl, optionally substituted aralkyl, optionally substituted alkyl, alkenyl, halogenoalkenyl, or in each case optionally substituted cycloalkyl, cycloalkenyl or cycloalkylalkyl, andR.sup.10 has the meaning of R.sup.9 or represents an optionally substituted heterocyclic ring,Y.sup.1 to Y.sup.4 are identical or different and represent hydrogen, halogen, nitro, cyano, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylthio, alkylsulfonyl or halogenoalkythio,R.sup.1 to R.sup.7 are identical or different and represent hydrogen, alkyl, halogenoalkyl or alkoxyalkyl,n represents 0 or 1, andZ represents alkyl, halogenoalkyl or a ##STR2## radical, in which R.sup.11 to R.sup.Type: GrantFiled: May 20, 1988Date of Patent: July 3, 1990Assignee: Bayer AktiengesellschaftInventors: Bernd-Wieland Kruger, Klaus Sasse, Peter Heitkamper, Klaus Konig, Wilhelm Brandes, Gerd Hanssler, Albrecht Marhold
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Patent number: 4888125Abstract: .alpha.-(4-isocyanatophenoxy)-.psi.-(4-isocyanato-3-methyl-phenoxy)-alkanes and mixtures thereof with the corresponding methyl-free and/or dimethyl substituted diisocyanates are made by phosgenating the corresponding diamine(s). These diisocyanates do not form a precipitate when reacted with a polyol and produce polyurethanes having outstanding properties.Type: GrantFiled: December 3, 1987Date of Patent: December 19, 1989Assignee: Bayer AktiengesellschaftInventors: Klaus Konig, Peter Heitkamper
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Patent number: 4657940Abstract: The present invention is directed to 4,4'-diisocyanato phenylbenzylether, its method of production by reaction of the corresponding diamine with phosgene and the use of the diisocyanate for the production of polyisocyanate polyaddition products, preferably polyurethane plastics.Type: GrantFiled: February 13, 1986Date of Patent: April 14, 1987Assignee: Bayer AktiengesellschaftInventors: Klaus Konig, Peter Heitkamper
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Patent number: 4597910Abstract: Bis-(4-isocyanatophenoxy)-alkanes corresponding to the formula ##STR1## in which R represents a divalent, saturated aliphatic hydrocarbon radical having from 2 to 6 carbon atoms with at least two carbon atoms between the two ether oxygen atoms, andR' represents hydrogen or a methyl group with R' being the same on both rings,are produced by phosgenating the corresponding diamine or an adduct of the corresponding diamine. These diisocyanates are particularly useful in the production of isocyanate addition products having outstanding physical and mechanical properties.Type: GrantFiled: November 8, 1985Date of Patent: July 1, 1986Assignee: Bayer AktiengesellschaftInventors: Klaus Konig, Peter Heitkamper
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Patent number: 4594441Abstract: A process for the preparation of urethanes. Urethanes having the general formula R.sub.1 (NHCOOR.sub.2).sub.n are reacted with an alcohol at a temperature of 120.degree. to 400.degree. C. in amounts such that, for every mol of the urethane, at least one mol of the alcohol is present. R.sub.1 is a radical obtained by removing the isocyanate groups from an n-functional organic isocyanate, which isocyanate has a boiling point greater than 100.degree. C. at atmospheric pressure. R.sub.2 is a radical obtained by removing the hydroxyl group from a monohydric alcohol which has a boiling point greater than 140.degree. C. at atmospheric pressure.Type: GrantFiled: May 14, 1984Date of Patent: June 10, 1986Assignee: Bayer AktiengesellschaftInventors: Kurt Findeisen, Klaus Konig, Rudolf Fauss, Peter Heitkamper
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Patent number: 4593117Abstract: Low molecular weight N- and O-substituted diurethanes and/or polyurethanes are prepared by reacting a diamine and/or polyamine containing a primary amino group with an N-aryl-0-alkyl urethane in the presence of at least one high boiling alcohol. This reaction may be carried out at a temperature of from 180.degree. to 350.degree. C. and a pressure of approximately 0.1 to 1,500 mbar. The arylamine corresponding to the N-ary-0-alkyl urethane which forms during this reaction is continuously removed from the reaction mixture.Type: GrantFiled: December 5, 1984Date of Patent: June 3, 1986Assignee: Bayer AktiengesellschaftInventors: Hartmut Knofel, Stefan Penninger, Gunther Hammen, Peter Heitkamper