Patents by Inventor Walter Schafer
Walter Schafer 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: 5292807Abstract: The present invention relates to compositions which are storage stable at room temperature and containA) at least one compound having at least two cyclic isourea groups per molecule andB) at least one compound having at least two carboxyl groups per molecule,in an amount sufficient to provide a molar ratio of isourea groups to carboxyl groups of 0.5:1 to 1.5:1.Type: GrantFiled: January 27, 1993Date of Patent: March 8, 1994Assignee: Bayer AktiengesellschaftInventors: Walter Schafer, Hanns P. Muller, Hans-Joachim Kreuder, Manfred Bock, Knud Reuter
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Patent number: 5254124Abstract: The invention concerns a hair-plucking head for a motor-driven depilation appliance. The head has a gripping device with at least two diametrically opposed spring-biased gripper jaws which can be pressed against the inside of a hollow cylinder mounted in the casing of the appliance. The jaws operate in conjunction with a control element disposed equiaxially with the cylinder axis. The appliance also has a transmission link between the motor and the cylinder and/or the control element. The jaws are mounted to pivot on pins located inside the cylinder and driven by the control element and a lever assembly.Type: GrantFiled: April 2, 1992Date of Patent: October 19, 1993Assignee: Braun AktiengesellschaftInventors: Hans-Eberhard Heintke, Gebhard Braun, Walter Schafer
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Patent number: 5242978Abstract: The present invention is directed to a novel composition and the use thereof in various coating applications. The composition broadly comprises:a) an organic compound containing a primary amino group and an alkoxysilane group, andb) a plastic precursor containing at least two acetoacetate and/or acetoacetamide groups per molecule.Type: GrantFiled: October 15, 1991Date of Patent: September 7, 1993Assignee: Bayer AktiengesellschaftInventors: Walter Schafer, Hanns-Peter Muller, Michael Sonntag
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Patent number: 5234441Abstract: To treat small areas of the skin, to obtain neat contours and to avoid pinching the skin, the appliance which is comprised of a motor 2 contained in a casing 1, a driving device 9, 11, 13 and an expiation head 5 includes a working surface defined by the end surface of a hollow cylinder 7 (=epilation head 5). In the interior of the hollow cylinder 7, a tweezing device is provided having tweezing members 16 acted upon by a revolving cam 18.Type: GrantFiled: January 6, 1992Date of Patent: August 10, 1993Assignee: Braun AktiengesellschaftInventors: Hans-Eberhard Heintke, Gebhard Braun, Walter Schafer
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Patent number: 5234442Abstract: The invention is directed to an epilating appliance, having a casing serving as a handle, a motor received in the casing, as well as a shaft carried in the casing and driven by the motor, the shaft having mounted thereon in a manner preventing relative rotation a set of circumferentially closed, relatively spaced circular disks arranged parallel to each other, and further having a casing opening exposing part of the circumference of the disks. The disks cooperate in pairs, each pair constituting a plucking device. On opposed faces of the disks, partial space-reducing means are provided. In the area between the motor and the shaft and parallel to the shaft, an axle is disposed in the casing having spreader rollers rotatably mounted thereon. The spreader rollers engage with part of their circumference in the space intermediate the disks of each plucking device.Type: GrantFiled: February 28, 1992Date of Patent: August 10, 1993Assignee: Braun AktiengesellschaftInventors: Walter Schafer, Hans-Eberhard Heintke, Gebhard Braun
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Patent number: 5104959Abstract: The present invention is directed to a polyurethane-based reactive adhesive comprising A) at least one polyisocyanate, B) at least one polyol, and C) at least one polyamine C which is a polyether amine containing at least two amino groups, at least one phenyl group and recurring polyoxyalkylene units.Type: GrantFiled: June 11, 1990Date of Patent: April 14, 1992Assignee: Bayer AktiengesellschaftInventors: Heinrich Hess, Richard Kopp, Gerhard Groglerl, Horst Stepanski, Rudolf Hombach, Walter Schafer
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Patent number: 5064884Abstract: The invention relates to blends of polyarylene sulfides, epoxides, glass fibers, optionally anhydride-containing polymers and optionally other additives. They are distinguished by good mechanical properties.Type: GrantFiled: March 4, 1991Date of Patent: November 12, 1991Inventors: Burkhard Kohler, Walter Uerdingen, Wolfgang Wehnert, Manfred Schmidt, Walter Schafer, Klaus Reinking
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Patent number: 4945137Abstract: A binder for a coating composition is a combination of(a) polymers containing intramolecular carboxylic anhydride groups and having an average molecular weight of from 500 to 25,000 and(b) organic compounds containing 4,5-dihydrooxazole groups in a quantity corresponding to an equivalent ratio of carboxylic anhydride groups to 4,5-dihydrooxazole groups of from 0.5:1 to 2:1, and contains from 0.005 to 5% by weight, based on the weight of components (a) and (b), of ammonia, a primary amine or secondary amine.Type: GrantFiled: October 2, 1989Date of Patent: July 31, 1990Assignee: Bayer AktiengesellschaftInventors: Walter Schafer, Hans Rudolph, Rolf Dhein, Hanns-Peter Muller, Michael Sonntag, Christian Wamprecht, Harald Blum, Walter Krauss
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Patent number: 4921996Abstract: The present invention relates to isocyanto-acylurethanes corresponding to Formula I ##STR1## wherein R has a valency of m+n and is a hydrocarbon group,R' is a hydrocarbon group andm and n may be identical or different, and each have a value of 1 or 2.The present invention also relates to a process for preparation of these isocyanato-acylurethanes which comprises reacting isocyanato-carboxylic acid chlorides with carbamic acid esters. Finally, the present invention is directed to the use of these isocyanato-acylurethanes as intermediate products for the production of thermally cross-linkable synthetic resins or synthetic resin precursors and also as intermediate products for the preparation of cross-linking agents for synthetic resins.Type: GrantFiled: August 2, 1988Date of Patent: May 1, 1990Assignee: Bayer AktiengesellschaftInventors: Walter Schafer, Hanns P. Muller, Tillmann Hassel
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Patent number: 4918135Abstract: An improved coating for heat resistant substrates is an aqueous dispersion of polymers prepared by polymerization of olefinically unsaturated monomers in an aqueous medium in the presence of radical formers and emulsifiers, wherein the emulsifiers are polyisocyanate addition products having a molecular weight below 20,000 and containing from 5 to 1000 milliequivalents of anionic structures corresponding to the following formula--NH--CO--N.sup..crclbar. --C.tbd.Nincorporated therein per 100 g of solids content.Type: GrantFiled: April 10, 1989Date of Patent: April 17, 1990Assignee: Bayer AktiengesellschaftInventors: Joachim Probst, Walter Schafer, Klaus Schuster, Heinrich Alberts, Hanns P. Muller, Adolf Schmidt, Wolfhart Wieczorrek
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Patent number: 4906181Abstract: A device for personal use includes a heating means that uses liquified petroleum gas, a gas container for liquified petroelum gas that has a longitudinal axis, and a vaporization element for supplying vaporized liquified petroelum gas from the gas container to the heating means. Non-porous structure in the gas container defines at least one capillary extending essentially transversely to the longitudinal axis of the gas container conveys liquified petroleum gas to the vaporization element.Type: GrantFiled: November 29, 1988Date of Patent: March 6, 1990Assignee: Braun AktiengesellschaftInventors: Richard Ebner, Michael Haas, Gerhard Hildebrand, Joachim Manthey, Karl ffinger, Walter Schafer, Gunther Seidel, Horst Urban, Udo Milutzki
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Patent number: 4904750Abstract: Dental fillings, coatings and teeth are formed of polymers and copolymers of a polyfunctional ester-urethane derivative of (meth)-acrylic acid of the formula ##STR1## in which A is a straight-chain or branched aliphatic radical which has 2 to 20 carbon atoms and optionally contains 1 to 3 oxygen bridges, an aromatic radical with 6 to 24 carbon atoms, an araliphatic radical with 7 to 26 carbon atoms or a cycloaliphatic radical with 6 to 26 carbon atoms,r denotes the number of chains starting from A and denotes a number from 2 to 6,R.sup.1 and R.sup.Type: GrantFiled: December 20, 1988Date of Patent: February 27, 1990Assignee: Bayer AktiengesellschaftInventors: Jurgen Reiners, Carlhans Suling, Walter Schafer, Hanns P. Muller, Wolfgang Podszun, Jens Winkel
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Patent number: 4900800Abstract: The present invention relates to a powder lacquer containing a mixture of(A) a polyisocyanate component in power form which is solid below about 40.degree. C. and liquid above about 150.degree. C. and(B) a organic polyhydroxyl component in powder form which is solid below about 40.degree. C. and liquid above about 150.degree. C.,components (A) and (B) being present in quantities corresponding to an equivalent ratio of isocyanate groups to hydroxyl groups of about 0.6:1 to 1.2:1, characterized in that component (A) is based on a polyisocyanate or polyisocyanate mixture which(a) does not contain any blocking agents for isocyanate groups,(b) has a content of free isocyanate groups (expressed as NCO) attached to tertiary, aliphatic or cycloaliphatic carbon atoms of about 8 to 24% by weight and an average NCO functionality of at least 2.1,(c) has a urethane group content (expressed as --NH--CO--O--) of about 3 to 30% by weight and(d) has an isocyanurate group content (expressed as C.sub.3 N.sub.3 O.sub.Type: GrantFiled: July 15, 1987Date of Patent: February 13, 1990Assignee: Bayer AktiengesellschaftInventors: Reinhard Halpaap, Josef Pedain, Hans-Joachim Kreuder, Gerhard Klein, Walter Schafer, Dieter Arlt
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Patent number: 4895921Abstract: The present invention is directed to water soluble or dispersible blocked polyisocyanates which contain(a) a statistical average per molecule of at least one structural unit corresponding to the formula:B--CO--NH--wherein B denotes a group obtainable by removal of the acidic hydrogen atom from a monofunctional blocking agent for organic isocyanates and(b) structural units corresponding to the formula ##STR1## in a quantity sufficient to ensure the solubility or dispersibility of the blocked polyisocyanate in water,the blocked polyisocyanates containing on statistical average a total of at least two structural units corresponding to the formulae (a) and (b) per molecule.The present invention also relates to a process for the preparation of these blocked polyisocyanates and to their use in combination with water soluble or dispersible organic compounds containing at least two isocyanate-reactive groups for the production of coated substrates which are cured by heating.Type: GrantFiled: October 4, 1988Date of Patent: January 23, 1990Assignee: Bayer AktiengesellschaftInventors: Walter Schafer, Hanns P. Muller, Rolf Dhein
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Patent number: 4882362Abstract: Foamed microbeads with a shell and an encased core are characterized in that the shell is a reaction product of an NCO-containing carbodiimide and a polyamine, and the core is at least partly filled with a polymeric carbodiimide or its reaction product with a polyamine, and in that the foamed microbeads are self-supporting and can be laden with hydrophilic and if appropriate hydrophobic liquids.Type: GrantFiled: October 7, 1988Date of Patent: November 21, 1989Assignee: Bayer AktiengesellschaftInventors: Norbert Weimann, Manfred Dahm, Ulrich Nehen, Walter Schafer
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Patent number: 4804687Abstract: Foamed microbeads with a shell and an encased core are characterized in that the shell is a reaction product of an NCO-containing carbodiimide and a polyamine, and the core is at least partly filled with a polymeric carbodiimide or its reaction product with a polyamine, and in that the foamed microbeads are self-supporting and can be laden with hydrophilic and if appropriate hydrophobic liquids.Type: GrantFiled: March 17, 1988Date of Patent: February 14, 1989Assignee: Bayer AktiengesellschaftInventors: Norbert Weimann, Manfred Dahm, Ulrich Nehen, Walter Schafer
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Patent number: 4739094Abstract: New alkoxylated aminopolyethers of the formula ##STR1## in which Q denotes a polyalkylene oxide radical which has a valency corresponding to n, which has a structure derived from an aminopolyether by removal of the terminal amino groups and which has an average molecular weight of 82 to 30,000,A.sub.1 and A.sub.2 denote identical or different mono- or polyalkylene oxide radicals of the type (RO).sub.y,whereineach radical R represents an alkylene radical with 2 to 40 C atoms andy represents an integer from 1 to 200,B.sub.1 and B.sub.2 denote identical or different mono- or polyalkylene oxide radicals of the type (R'O).sub.z,whereinat least 50% of the R' radicals represent a --CH.sub.2 --CH.sub.2 -- group,the other R' radicals which may be present each represent an alkylene radical with 3 to 40 C atoms andz represents an integer from 1 to 300,Z denotes hydrogen, ##STR2## wherein M.sup..sym. represents one equivalent of a metal ion or represents NH.sub.4.sup..sym.Type: GrantFiled: December 10, 1985Date of Patent: April 19, 1988Assignee: Bayer AktiengesellschaftInventors: Jan Mazanek, Hanns P. Muller, Roland Nast, Wolfgang Oberkirch, Franz-Moritz Richter, Walter Schafer
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Patent number: 4707386Abstract: The present invention relates to a process for the production of water- and solvent-resistant coatings by coating substrates with an aqueous coating composition containing as binder a mixture of(1) reaction products, containing anionic structural units of the formula ##STR1## in a quantity of 5 to 1200 milliequivalents per 100 g of said reaction products, obtained by reacting organic polyisocyanates with salts of cyanamide and bases selected from ammonia, volatile primary and secondary amines having a pKb-value of at least 3.1 and any volatile aliphatic tertiary amines and(2) polyepoxides having at least two epoxide groups per molecule and an epoxide equivalent of at least about 80, said polyepoxides being used in a quantity corresponding to an equivalent ratio of epoxide groups to anionic structural units of about 0.1:1 to 3:1, andcross-linking the binder at a temperature of about 5 to 200.degree. C. The present invention is also directed to the aqueous coating composition based on components 1 and 2.Type: GrantFiled: December 22, 1986Date of Patent: November 17, 1987Assignee: Bayer AktiengesellschaftInventors: Walter Schafer, Hanns P. Muller, Rolf Kuchenmeister, Armin Sickert
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Patent number: 4619966Abstract: The present invention is directed to a process for the production of water- and solvent-resistant coated substrates by coating heat-resistant substrates with a solution or dispersion of an anionic group-containing polyisocyanate addition product in an aqueous solvent or dispersant and subsequently thermally treating the coating at a temperature of about 60.degree. to 200.degree. C., with evaporation or vaporization of the solvent or dispersant and simultaneous crosslinking of the polyisocyanate addition product which has been applied to the substrate, characterized in that incorporated anionic structural units corresponding to the formula ##STR1## are used in a quantity of about 5 to 1000 milliequivalents per 100 g of solids and the solids are based on reaction products of organic polyisocyanates with salts of cyanamide and bases selected from ammonia, primary and secondary amines having a minimum pKb value of 3.1, tertiary amines and mixtures thereof.Type: GrantFiled: November 7, 1985Date of Patent: October 28, 1986Assignee: Bayer AktiengesellschaftInventors: Walter Schafer, Manfred Hajek, Hanns P. Muller, Rolf Dhein, Rolf Kuchenmeister, Armin Sickert
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Patent number: 4611034Abstract: Polyamide block copolymers obtained by activated anionic polymerization of lactams having at least 5 ring members in the presence of basic catalysts, polyisocyanates as activators and amino-terminated polyethers, which are characterized in that the amino-terminated polyethers have a functionality of at least 3.0 preferably at least 3.2, and a molecular weight of at least 3500, and the polyisocyanates are aliphatic or cycloaliphatic polyisocyanates.Type: GrantFiled: July 1, 1985Date of Patent: September 9, 1986Assignee: Bayer AktiengesellschaftInventors: Rolf-Volker Meyer, Friedrich Fahnler, Rolf Dhein, Dietrich Michael, Kurt Weirauch, Walter Schafer