Patents by Inventor Werner Waldenrath
Werner Waldenrath 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: 5236657Abstract: The production of multi-layer mouldings (17) from a sheet (6) injection-moulded behind with a resin can be simplified by the sheet (6) being deformed in an injection mould by means of a fluid pressure medium, in particular nitrogen, at at least 20 bar and the deformed sheet (6) injection-moulded behind with resin directly thereafter in this injection mould, a pressure keeping the deformed sheet (6) in position being maintained during the injection-moulding behind.Type: GrantFiled: January 25, 1991Date of Patent: August 17, 1993Assignee: Bayer AktiengesellschaftInventors: Werner Waldenrath, Joachim Wank, Wolfgang Lamaack, Dietmar Benner, Friedrich Johannaber, Karl-Heinz Julicher
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Patent number: 5227458Abstract: Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,m is an integer of from 4 to 7,R.sup.3 and R.sup.4, individually selectable for each X, independently of one another represent hydrogen or C.sub.1 -C.sub.6 alkylandX represents carbon with the proviso that, at at least one atom X, both R.sup.3 and R.sup.4 are alkyl,a process for their production, their use for the production of high molecular weight polycarbonates, the polycarbonates made from dihydroxydiphenyl cycloalkane of formula (I) and films made from these polycarbonates.Type: GrantFiled: March 31, 1992Date of Patent: July 13, 1993Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Uwe Westeppe, Claus H. Wulff, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans, Lutz Schrader, Werner Waldenrath
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Patent number: 5207961Abstract: The invention relates to new injection-moulded articles made from metal/plastic composite systems containing a polyurethane adhesive (intermediate) layer, and a process for the preparation thereof.Type: GrantFiled: August 6, 1990Date of Patent: May 4, 1993Assignee: Bayer AktiengesellschaftInventors: Joachim Wank, Werner Waldenrath, Eckart Reese
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Patent number: 5140056Abstract: The invention relates to the use of salts of sulfosuccinic acid esters as internal antistatic agents, take-off and winding aids for transparent cast films of polycarbonates, to a process for the production of cast polycarbonate films and to the cast polycarbonate films themselves containing salts of sulfosuccinic acids and also to the use of the new cast polycarbonate films in the electrical field and optical field.Type: GrantFiled: February 21, 1990Date of Patent: August 18, 1992Assignee: Bayer AktiengesellschaftInventors: Volker Wiskamp, Dittmar Nerger, Bernhard Schulte, Werner Waldenrath
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Patent number: 5126428Abstract: Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,m is an integer of from 4 to 7,R.sup.3 and R.sup.4, individually selectable for each X, independently of one another represent hydrogen or C.sub.1 -C.sub.6 alkyl andX represents carbon with the proviso that, at least one atom X, bothR.sup.3 and R.sup.4 are alkyl,a process for their production, their use for the production of high molecular weight polycarbonates, the polycarbonates made from dihydroxydiphenyl cycloalkane of formula (I) and films made from these polycarbonates.Type: GrantFiled: October 15, 1990Date of Patent: June 30, 1992Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Uwe Westeppe, Claus H. Wulff, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans, Lutz Schrader, Werner Waldenrath
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Patent number: 5076987Abstract: A process for the production of optically isotropic extrusion films is disclosed. Accordingly in a first process step a thermoplsatic resin is extruded to form a film having a thickness below 600 .mu.m. The second process step entailsa) calendering said film between a ground elastic roller and a high gloss steel roller to produce a film having a high gloss surface and a matt surface, orb) calendering said film between a lacquered elastic roller and a high gloss steel roller to produce a film having high gloss on both surfaces, orc) calendering said film between a ground elastic roller and a high gloss steel roller to produce a film having a high gloss surface and a matt surface, and then coating said matt surface with a melt of said thermoplastic polymer and calendering the resulting coated film between a high gloss steel roller and a ground elastic roller, with the high gloss side of the coated film facing the roller of elastic material.Type: GrantFiled: April 4, 1990Date of Patent: December 31, 1991Assignee: Bayer AktiengesellschaftInventors: Joachim Wank, Hans L. Weber, Claus Burkhardt, Dieter Freitag, Bernhard Schulte, Werner Waldenrath
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Patent number: 5056617Abstract: The positive characteristics of loudspeaker diaphragms are improved by the use of a thermoplastic polyurethane sheet with a thickness of 0.06 to 0.8 mm at least for the moving part (1).Type: GrantFiled: September 8, 1989Date of Patent: October 15, 1991Assignee: Bayer AktiengesellschaftInventors: Joachim Wank, Werner Waldenrath, Dieter Freitag
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Patent number: 5055345Abstract: A 0.3 to 2 mm thick multilayer composite material comprising the following layers:1st layer: 0.01 to 0.3 mm thick highly transparent thermoplastic2nd layer: 5 to 50 .mu.m thick decorative ink layer and/or 5 to 50 .mu.m thick adhesive layer3rd layer: 0.05 to 0.5 mm thick thermoplastic containing 0.1 to 30% by weight pigment4th layer: 0.05 to 0.8 mm thick highly elastic plastic containing up to 30% by weight pigment5th layer: 0.05 to 0.5 mm thick thermoplastic containing 0.1 to 30% by weight pigment6th layer: 5 to 50 .mu.m decorative ink layer and/or 5 to 50 .mu.m thick adhesive layer7th layer: 0.01 to 0.3 mm thick highly transparent thermoplastic is disclosedlayers 3 and 5 being optional.Type: GrantFiled: February 20, 1990Date of Patent: October 8, 1991Assignee: Bayer AktiengesellschaftInventors: Joachim Wank, Walter Uerdingen, Lutz Schrader, Werner Waldenrath
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Patent number: 5037220Abstract: Films from aromatic polyesters and from aromatic polyestercarbonates are excellently suitable for preparing printing ribbons, in particular for thermal and electrothermal recording processes.Type: GrantFiled: July 13, 1988Date of Patent: August 6, 1991Assignee: Bayer AktiengesellschaftInventors: Volker Serini, Bernhard Schulte, Claus Burkhardt, Dieter Freitag, Uwe Hucks, Werner Waldenrath, Hans-Leo Weber
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Patent number: 4982014Abstract: Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,m is an integer of from 4 to 7,R.sup.3 and R.sup.4, individually selectable for each X, independently of one another represent hydrogen or C.sub.1 -C.sub.6 alkylandX represents carbonwith the proviso that, at at least one atom X, both R.sup.3 and R.sup.4 are alkyl, a process for their production, their use for the production of high molecular weight polycarbonates, the polycarbonates made from dihydroxydiphenyl cycloalkane of formula (I) and films made from these polycarbonates.Type: GrantFiled: August 4, 1989Date of Patent: January 1, 1991Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Uwe Westeppe, Claus H. Wulff, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans, Lutz Schrader, Werner Waldenrath
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Patent number: 4970108Abstract: This invention relates to multilayer films composed of thermoplastic films, tough elastic polyurethane films and optionally a sealing layer and to the use of these multilayer films for the manufacture of crash pad films, i.e. as outer skin for automobile dash boards.Type: GrantFiled: March 30, 1990Date of Patent: November 13, 1990Assignee: Bayer AktiengesellschaftInventors: Joachim Wank, Werner Waldenrath, Walter Uerdinger, Dieter Freitag, Hans E. Braese
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Patent number: 4908430Abstract: This invention relates to the use of new special polyimides for the production of cast films and coatings.Type: GrantFiled: May 2, 1988Date of Patent: March 13, 1990Assignee: Bayer AktiengesellschaftInventors: Wilfried Zecher, Dieter Arlt, Lutz Schrader, Werner Waldenrath
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Patent number: 4902573Abstract: The invention relates to a method for the production of shaped plastic parts which are provided with an antistatic adhesive thermoplastic coating; according to the method, the adhesive thermoplastic coating is coated with a solution which contains a binder and a suitable oxidant for the oxidative polymerization of 5- or 6-membered heterocyclic compounds which have nitrogen or sulphur as heteroatoms, and the coating thus obtained is treated with a solution of the 5- or 6-membered heterocyclic compound.Type: GrantFiled: August 22, 1988Date of Patent: February 20, 1990Assignee: Bayer AktiengesellschaftInventors: Friedrich Jonas, Werner Waldenrath
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Patent number: 4888243Abstract: The invention relates to a process for the preparation of plastic mouldings, preferably plastic films, antistatically treated with a transparent layer of polypyrrole; the process is characterized by a certain combination of special measures which are coordinated with one another.Type: GrantFiled: July 14, 1988Date of Patent: December 19, 1989Assignee: Bayer AktiengesellschaftInventors: Friedrich Jonas, Werner Waldenrath
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Patent number: 4876033Abstract: This invention relates to carbon-containing moulded bodies based on thermoplastic polycarbonates and thermoplastic polyalkylene terephtalates with an addition of carbon black and graphite and to a process for the production of these moulded bodies.Type: GrantFiled: April 25, 1988Date of Patent: October 24, 1989Assignee: Bayer AktiengesellschaftInventors: Heinz-Jurgen Dziurla, Dieter Freitag, Werner Waldenrath, Claus Burkhardt, Bernhard Schulte
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Patent number: 4859263Abstract: A method for manufacturing printed electrical circuits which comprise a substrate and copper foil applied thereto by hot embossing in a predetermined circuit pattern, said method comprising(a) providing a laminate which comprises the sequence of a printed circuit substrate, a heat activated adhesive layer, a copper foil and a carrier film which is electrically conductive,(b) passing an electrical current between two electrodes and through the carrier film wherein one electrode has sufficiently large film contact area whereby substantially no resistance heating results from the current density and the other electrode serves as an embossing tool and is of sufficiently small film contact area whereby sufficient resistance heating results from the current density to activate the adhesive layer to bond the copper foil to the substrate in the pattern of said other electrode, and(c) removing from the laminate the carrier film and such copper foil overlying areas where the adhesive was not heat activated thereby leavType: GrantFiled: March 17, 1988Date of Patent: August 22, 1989Assignee: Bayer Aktiengesellschaft AGInventors: Heinz-Jurgen Dziurla, Hans-Leo Weber, Dieter Freitag, Werner Waldenrath
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Patent number: 4828901Abstract: An invention relates to new injection-moulded articles made from metal/plastic composite systems containing a polyurethane adhesive (intermediate) layer, and a process for the preparation thereof.Type: GrantFiled: May 26, 1987Date of Patent: May 9, 1989Assignee: Bayer AktiengesellschaftInventors: Joachim Wank, Werner Waldenrath, Eckart Reese
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Patent number: 4806412Abstract: The invention relates to laminates of five or six components and to their use for the production of skis, surfboards and furniture components.Type: GrantFiled: April 13, 1988Date of Patent: February 21, 1989Assignee: Bayer AktiengesellschaftInventors: Joachim Wank, Werner Waldenrath, Rudolf Hombach
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Patent number: 4791016Abstract: A polycarbonate film obtained by dispersing carbon black in a solution of thermoplastic aromatic polycarbonate, producing a cast film, and subsequently stretching the cast film, is characterized in that its elongation at break is greater than that of a corresponding unstretched similarly filled film having an identical thickness.Type: GrantFiled: February 20, 1987Date of Patent: December 13, 1988Assignee: Bayer AktiengesellschaftInventors: Bernhard Schulte, Werner Tischer, Werner Waldenrath, Hans Kaloff
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Patent number: 4786708Abstract: Films from aromatic polyesters and from aromatic polyestercarbonates are excellently suitable as electrically insulating films, for example as dielectric for capacitors and as conductor track films.Type: GrantFiled: April 29, 1987Date of Patent: November 22, 1988Assignee: Bayer AktiengesellschaftInventors: Volker Serini, Bernhard Schulte, Claus Burkhardt, Dieter Freitag, Uwe Hucks, Werner Waldenrath, Hans-Leo Weber