Patents by Inventor Günther Ittmann
Günther Ittmann 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: 7704586Abstract: The present invention relates to plastic molded bodies having two-dimensional or three-dimensional image structures produced in the interior through laser subsurface engraving. The plastic molded bodies are made of plastic materials which have a content of nanoscale metal oxides having particle sizes from 1 to 500 nm, both the plastic material and also the included metal oxide being transparent to the laser light used for producing the image structures. The plastic materials from which the molded bodies are manufactured particularly contain metal oxides having particle sizes from 5 to 100 nm at a content of 0.0001 to 0.1 weight-percent. Typical metal oxides are nanoscale indium-tin oxide or antimony-tin oxide.Type: GrantFiled: March 7, 2006Date of Patent: April 27, 2010Assignee: Degussa AGInventors: Klaus-Dieter Schübel, Jürgen Kreutz, Wilhelm Wolff, Günther Ittmann, Thomas Hasskerl, Harald Häger, Ralf Richter, Wolfgang Stuber
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Patent number: 7497972Abstract: The invention relates to a moulding composed of a plastics matrix composed of a transparent plastic, comprising a soluble fluorescent dye and a scattering agent whose refractive-index difference from the plastics matrix is +/? from 0.003 to 0.2, characterized in that a white pigment whose refractive-index difference from the plastics matrix is from +0.4 to 1.5 is also present, at a concentration of from 0.001 to 0.1% by weight.Type: GrantFiled: July 25, 2003Date of Patent: March 3, 2009Assignee: Roehm GmbH & Co. KGInventors: Hans Lichtenstein, Guenther Ittmann, Eduard Albrecht
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Publication number: 20060237872Abstract: The alkylamino salt of mono- or dialkyl-substituted phosphoric acid can be used as release agent in polymers.Type: ApplicationFiled: April 13, 2004Publication date: October 26, 2006Applicant: ROEHM GBMH & CO KGInventor: Guenther Ittmann
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Publication number: 20060229397Abstract: The invention relates to moulded bodies for illuminated advertising, comprising a poly(meth)acrylate matrix, diffusion particles containing plastic and inorganic diffusion particles. Said moulded bodies contain between 0.05 and 0.5 wt. % diffusion particles containing plastic with a size ranging between 5 and 15 ?m and between 0.1 and 3 wt. % inorganic diffusion particles with a size ranging between 1 and 7.5 ?m.Type: ApplicationFiled: March 2, 2004Publication date: October 12, 2006Applicant: Roehm GMBH & Co. KGInventors: Hans Lichtenstein, Guenther Ittmann
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Publication number: 20060155048Abstract: The alkylamino salt of mono- or dialkyl-substituted phosphoric acid can be used as heat stabilizer in polymers.Type: ApplicationFiled: April 17, 2004Publication date: July 13, 2006Applicant: Roehm GMBH & Co. KGInventor: Guenther Ittmann
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Patent number: 7052161Abstract: The invention relates to an illuminative device essentionaly comprising a light source and a diffusing cover which is assigned to the light source and is made of colored plastic. The light source consites of one or several light-emitting diodes (LEDs) emitting a colored an substantially monocromatic light. The diffusing cover assigned thereto has a transmition (DIN 5036) of at least 35% and a reflection (DIN 5036) of at least 15% with the wavelength of the light-emitting diode operating at relative maximum energy.Type: GrantFiled: November 21, 2002Date of Patent: May 30, 2006Assignee: ROEHM GmbH & Co. KGInventors: Hans Lichtenstein, Jann Schmidt, Guenther Ittmann, Eduard Albrecht
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Patent number: 7046903Abstract: The present invention relates to a light-guide body, which has at least one light-entry surface and at least one light-exit surface, the ratio of the light-exit surface area to the light-entry surface area being at least 4, comprising at least one light-guiding layer with a thickness of at least 2 mm, characterized in that the light-guiding layer comprises at least 60% by weight, expressed in terms of the weight of the light-guiding layer, of polymethyl methacrylate and from 0.001 to 0.08% by weight, expressed in terms of the weight of the light-guiding layer, of spherical barium sulphate particles with an average diameter in the range of from 0.3 to 20 ?m.Type: GrantFiled: October 16, 2002Date of Patent: May 16, 2006Assignee: Roehm GmbH & Co. KGInventors: Jann Schmidt, Guenther Ittmann, Hans Lichtenstein, Herbert Groothues
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Publication number: 20050288416Abstract: The invention relates to a moulding composed of a plastics matrix composed of a transparent plastic, comprising a soluble fluorescent dye and a scattering agent whose refractive-index difference from the plastics matrix is +/? from 0.003 to 0.2, characterized in that a white pigment whose refractive-index difference from the plastics matrix is from +0.4 to 1.5 is also present, at a concentration of from 0.001 to 0.1% by weight.Type: ApplicationFiled: July 25, 2003Publication date: December 29, 2005Applicant: ROEHM GmbH & Co., KGInventors: Hans Lichtenstein, Guenther Ittmann, Eduard Albrecht
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Publication number: 20050084993Abstract: The present invention relates to a [lacuna] having at least one light-entry surface and at least one light-exit surface, the ratio of the light-exit surface area to the light-entry surface area being at least 4, comprising at least one light-guiding layer, characterized in that the light-guiding layer comprises at least 60% by weight, expressed in terms of the weight of the light-guiding layer, of polymethyl methacrylate and from 0.0001 to 0.2% by weight, expressed in terms of the weight of the light-guiding layer, of spherical particles with an average diameter in the range of from 0.3 to 40 ?m, and the light-exit surface of the light-guiding layer is provided with structurings.Type: ApplicationFiled: May 6, 2003Publication date: April 21, 2005Applicant: Roehm Gbmh & Co. KGInventors: Jann Schmidt, Markus Parusel, Herbert Groothues, Guenther Ittmann
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Publication number: 20050002189Abstract: An illuminative device including a light source and a diffusing cover assigned to the light source and of colored plastic. The light source includes one or plural light-emitting diodes (LEDs) emitting a colored and substantially monochromatic light. The diffusing cover has a transmission of at least 35% (measured according to DIN 5036) and a reflection of at least 15% (measured according to DIN 5036) with the wavelength of the light-emitting diode operating at relative maximum energy.Type: ApplicationFiled: November 21, 2002Publication date: January 6, 2005Inventors: Hans Lichtenstein, Jann Schmidt, Guenther Ittmann, Eduard Albrecht
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Publication number: 20040264159Abstract: The present invention relates to a light-guide body, which has at least one light-entry surface and at least one light-exit surface, the ratio of the light-exit surface area to the light-entry surface area being at least 4, comprising at least one light-guiding layer with a thickness of at least 2 mm, characterized in that the light-guiding layer comprises at least 60% by weight, expressed in terms of the weight of the light-guiding layer, of polymethyl methacrylate and from 0.001 to 0.08% by weight, expressed in terms of the weight of the light-guiding layer, of spherical barium sulphate particles with an average diameter in the range of from 0.3 to 20 &mgr;m.Type: ApplicationFiled: March 11, 2004Publication date: December 30, 2004Inventors: Jann Schmidt, Guenther Ittmann, Hans Lichtenstein, Herbert Groothues
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Publication number: 20040191485Abstract: A plastic body including a base molded body produced from a transparent, thermoplastic base material, and that includes at least two opposing flat layers interconnected by vertical or diagonal connecting elements. One of the flat layers is provided with an additional layer of a plastic matrix in a transparent, plastic base material. The additional layer is an IR-absorbent layer containing at least one IR-absorber that does not impair transparency of the plastic body and has an average transmission of less than 80% in the region of the near-infrared radiation (780 nm to 1100 nm). The plastic body has a light transmission of between 15% and 86%, a maximum heat transition coefficient of 4 W/m2K and a minimum Sk value of 1.15. The plastic body can be used, e.g., as a glazing element, a roofing element, a heat insulating element.Type: ApplicationFiled: February 9, 2004Publication date: September 30, 2004Inventors: Herbert Groothues, Volker Mende, Hans Lorenz, Wolfgang Scharnke, Guenther Ittmann, Thomas Hasskerl, Norbert Brand, Bernhard Schaefer
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Patent number: 6716950Abstract: The invention describes a polymer with high transmission for UV rays, this transmission being preserved even after prolonged exposure to UV light (tanning lamps). The polymer is further characterized by a low residual monomer content (determined as methyl methacrylate).Type: GrantFiled: April 20, 2001Date of Patent: April 6, 2004Assignee: Roehm GmbH & Co. KGInventors: Sabine Servaty, Rolf Neeb, Guenther Ittmann
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Patent number: 6624226Abstract: By copolymerisation of compounds which are acid or have a hydroxy or epoxy function in a casting resin with a filler contents of between 10 and 80%, moulded parts on a polymethylmethacrylate basis are obtained which pass the B1-test even without addition of fire-retardant agents and in addition present improved mechanical properties.Type: GrantFiled: February 7, 2001Date of Patent: September 23, 2003Assignee: Roehm GmbH & Co. KGInventors: Sabine Servaty, Guenther Ittmann
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Publication number: 20020052460Abstract: The invention describes a polymer with high transmission for UV rays, this transmission being preserved even after prolonged exposure to UV light (tanning lamps). The polymer is further characterized by a low residual monomer content (determined as methyl methacrylate).Type: ApplicationFiled: April 20, 2001Publication date: May 2, 2002Applicant: ROEHM GmbH & Co., KGInventors: Sabine Servaty, Rolf Neeb, Guenther Ittmann
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Patent number: 5756211Abstract: The invention relates to high filler content plastic molded articles, which articles have a surface having a pronounced glitter appearance resembling that of a microcrystalline mineral material. The glitter effect is obtained by incorporating glitter-producing particles having a plastic basis and a specific gravity <2, in the composition of said articles. A method of manufacturing such molded articles is described, according to which all of the components are adjusted to corresponding densities. The products have a particularly durable simulated-rock appearance with good glitter characteristics.Type: GrantFiled: June 3, 1996Date of Patent: May 26, 1998Assignee: Roehm GmbH Chemische FabrikInventors: Guenther Ittmann, Manfred Krieg
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Patent number: 5690872Abstract: A method for the casting of highly filled plastics containing polymethyl methacrylate, the method involving:preparing a filler suspension by combining from 30 to 80 wt %, based on the amount of filler suspension, of at least one particle-shaped, inorganic filler with a polymer precursor under high-speed stirring, wherein the polymer precursor is made from methyl methacrylate and a polymethyl methacrylate prepolymer, wherein the filler suspension further contains from 1 to 20 parts by weight, based on the amount of filler suspension, of a colored, filled, comminuted polymer material having a density precisely adapted to the density of the filler suspension and wherein the comminuted polymer material contains a polymer component which is highly crosslinked; andpolymerizing the filler suspension by contacting the filler suspension with at least one radical initiator.Type: GrantFiled: March 7, 1996Date of Patent: November 25, 1997Assignee: Roehm GmbH Chemische FabrikInventors: Manfred Krieg, Guenther Ittmann
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Patent number: 5464898Abstract: A cast resin suspensions comprising:(A) 40 to 80% by weight of an inorganic filler,(B) 60 to 20% by weight of a liquid polymerizable organic monomer, and(C) 0 to 5 parts by weight based on the sum of (A) and (B) of a polymerizable organosilicon component as coupling agent,wherein inorganic filler (A) is a mixture of at least two filler particle fractions having different median particle sizes, wherein the size ratio of the average particle sizes of the large and small filler particles ranges from 10:1 to 2:1 and wherein the weight ratio of the contents of large and small filler particles is from 4:1 to 1:4.Type: GrantFiled: September 19, 1994Date of Patent: November 7, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Guenther Ittmann, Manfred Krieg
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Patent number: 5449727Abstract: Color concentrates comprising a colorant such as a pigment and a polymeric binder, and polymeric binders therefor, said polymeric binders comprising:(a) 70-90 percent of methyl methacrylate, by weight of the polymer;(b) 10-20 percent of methyl acrylate; and(c) from 0 to 10 percent of at least one free radically polymerizable monomer of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl and R.sub.2 is a moiety carrying a functional group.Type: GrantFiled: September 1, 1993Date of Patent: September 12, 1995Assignee: Rohm GmbHInventors: Manfred Krieg, Hans Lichtenstein, Ludwig Hosch, Guenther Ittmann
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Patent number: 5266253Abstract: The present invention relates to a method of manufacturing molded polymer articles comprised of casting resins and having color-differentiated surface regions, wherein prior to the charging of the casting resin, a surface region of the molding implement is coated with a hardenable coating of a colorant-containing composition, producing color-differentiation in the surface of the molded articles. The designated surface regions of the molding implement are coated with at least two layers, whereby, according to the present method, the first coating step applies a filler-containing coating dispersion (L-1) without added colorant, and the second coating step applies a colorant-containing coating (L-2) without filler. Thereafter, the coating layers are dried, the casting resin is charged to the molding implement, the resin is polymerized by heating, and the molded articles removed from the mold.Type: GrantFiled: June 29, 1992Date of Patent: November 30, 1993Assignees: Roehm GmbH Chemische Fabrik, Bowic B.V.Inventors: Okko K. Dijkhuizen, Manfred Krieg, Guenther Ittmann