Patents by Inventor Olaf Bohme
Olaf Bohme 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: 8430973Abstract: The present invention relates to a process for improving the heat and corrosion resistance of stainless steel by means of a novel passivation process. This process comprises a chemical treatment with an aqueous solution comprising a complexing agent combination of at least one oxidant, a subsequent rinsing and a subsequent treatment at elevated temperature in an oxygen-containing atmosphere. The stainless steel surfaces obtained according to the invention have a homogeneous passive layer having increased chemical resistance and resistance to thermal discoloration.Type: GrantFiled: February 22, 2008Date of Patent: April 30, 2013Assignee: Poligrat GmbHInventors: Olaf Böhme, Siegfried Piesslinger-Schweiger
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Patent number: 8080148Abstract: The present invention relates to a method of electrochemical polishing of surfaces of cobalt or cobalt alloys. It employs an electrolyte comprising glycolic acid and at least one alkane-sulfonic acid with an alkyl residue that has 1 to 3 carbon atoms. This electrolyte is also one aspect of the present invention. In one embodiment, at least one alkane-sulfonic acid comprises methane-sulfonic acid. The electrolyte and the method using this electrolyte are suitable in particular for surfaces of cobalt or cobalt alloys, including cobalt-chromium alloys such as stellite.Type: GrantFiled: September 24, 2007Date of Patent: December 20, 2011Assignee: Poligrat GmbHInventors: Siegfried Piesslinger-Schweiger, Olaf Böhme
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Patent number: 7807039Abstract: The present invention relates to electrolytes for electrochemically polishing workpieces consisting of titanium, titanium alloys, niobium, niobium alloys, tantalum and tantalum alloys, which electrolytes contain sulfuric acid, ammonium bifluoride and at least one hydroxycarboxylic acid, and a method for electrochemical polishing.Type: GrantFiled: April 30, 2004Date of Patent: October 5, 2010Assignee: Poligrat-Holding GmbHInventors: Siegfried Piesslinger-Schweiger, Razmik Abedian, Olaf Böhme
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Publication number: 20100132844Abstract: The present invention relates to a process for improving the heat and corrosion resistance of stainless steel by means of a novel passivation process. This process comprises a chemical treatment with an aqueous solution comprising a complexing agent combination of at least one oxidant, a subsequent rinsing and a subsequent treatment at elevated temperature in an oxygen-containing atmosphere. The stainless steel surfaces obtained according to the invention have a homogeneous passive layer having increased chemical resistance and resistance to thermal discoloration.Type: ApplicationFiled: February 22, 2008Publication date: June 3, 2010Applicant: POLIGRAT GMBHInventors: Olaf Bohme, Siegfried Piesslinger-Schweiger
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Publication number: 20090200178Abstract: The present invention describes a cost-saving and environmentally conserving process for the electrochemical polishing of steel, in particular of low-alloy steels. The workpieces are rinsed after electropolishing in an arid phosphoric acid-sulfuric acid-bath in a first rinsing step with a phosphoric acid-containing solution, whereby a chemical attack on the freshly polished surfaces is avoided without the use of environmentally harmful and unhealthy inhibitors such as chromates. By recycling of the acids and the rinsing solution, these acids and solutions can be regenerated, whereby the process can be designed effluent-free.Type: ApplicationFiled: July 31, 2006Publication date: August 13, 2009Applicant: POLIGRAT GMBHInventors: Siegfried Piesslinger-Schweiger, Olaf Böhme
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Publication number: 20080289970Abstract: The present invention relates to a method of electrochemical polishing of surfaces of cobalt or cobalt alloys. It employs an electrolyte comprising glycolic acid and at least one alkane-sulfonic acid with an alkyl residue that has 1 to 3 carbon atoms. This electrolyte is also one aspect of the present invention. In one embodiment, at least one alkane-sulfonic acid comprises methane-sulfonic acid. The electrolyte and the method using this electrolyte are suitable in particular for surfaces of cobalt or cobalt alloys, including cobalt-chromium alloys such as stellite.Type: ApplicationFiled: September 24, 2007Publication date: November 27, 2008Applicant: POLIGRAT GMBHInventors: Siegfried PIESSLINGER-SCHWEIGER, Olaf BOHME
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Publication number: 20080217186Abstract: The present invention relates to a method of electrochemical polishing of surfaces of titanium or titanium-containing alloys, such as Nitinol. An electrolyte is used that comprises methanesulfonic acid and one or more alkanediphosphonic acids. These alkanediphosphonic acids can optionally be substituted with hydroxy and/or amino groups. A further aspect of the present invention relates to the use of said electrolyte for the electropolishing of titanium or titanium-containing alloys.Type: ApplicationFiled: March 10, 2008Publication date: September 11, 2008Applicant: POLIGRAT GmbHInventors: Olaf Bohme, Siegfried Piesslinger-Schweiger
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Publication number: 20080182562Abstract: An efficient monitoring of non-real time data connection contexts is simply and efficiently achieved by a method permitting the monitoring of a non-real time data connection context of a user of a cellular mobile radio network for an interruption, characterized in that a signaling context for the user is established as a real-time signaling context with the mobile radio network and, in the case of a determined interruption of the real-time signaling context for the user are assumed.Type: ApplicationFiled: December 7, 2005Publication date: July 31, 2008Applicant: NOKIA SIEMENS NETWORKS GMBH & CO. KGInventors: Olaf Bohme, Uwe Foll
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Publication number: 20080121530Abstract: The present invention relates to a method for the electropolishing of surfaces of metals and metal alloys. Said method is characterized in particular in that it can be applied to a wide range of metals. Thus, it is suitable for the electropolishing of metal surfaces comprising iron, tungsten, magnesium, aluminum or an alloy of these metals. The electrolyte used in the method comprises methanesulfonic acid and at least one alcoholic compound selected from aliphatic diols of general formula CnH2n(OH)2 with n=2-6 and alicyclic alcohols of general formula CmH2m-1OH with m=5-8.Type: ApplicationFiled: November 9, 2007Publication date: May 29, 2008Applicant: POLIGRAT GmBHInventors: Siegfried PIESSLINGER-SCHWEIGER, Olaf BOHME
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Publication number: 20080099345Abstract: The present invention relates to a method for the electrochemical polishing of surfaces of metals and metal alloys, in particular surfaces of niobium, niobium alloys, tantalum and tantalum alloys. It uses an electrolyte that comprises methanesulfonic acid and ammonium bifluoride, and which is also an object of the present invention. Said electrolyte makes it possible to electropolish niobium-containing and/or tantalum-containing workpieces efficiently, with high quality and in a manner that is harmless both for the workpiece and for humans and the environment.Type: ApplicationFiled: October 9, 2007Publication date: May 1, 2008Applicant: POLIGRAT GmbHInventors: Siegfried Piesslinger-Schweiger, Olaf Bohme
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Publication number: 20080067149Abstract: The present invention relates to the use of a mixture of urea and one or more alkane-diphosphonic acids, optionally substituted with one or more hydroxyl or amino groups, or salts thereof for the stabilization of an acidic, metal- and peroxide-containing polishing solution. The invention also relates to peroxide-containing solutions that are suitable for the stabilization of acidic, metal- and peroxide-containing polishing baths, and acidic, peroxide-containing polishing solutions that contain the stabilizer mixture according to the invention. A method of chemical polishing of metal surfaces using the stabilizer according to the invention is also described.Type: ApplicationFiled: September 19, 2007Publication date: March 20, 2008Applicant: POLIGRAT GMBHInventors: Siegfried PIESSLINGER-SCHWEIGER, Olaf BOHME
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Publication number: 20070217395Abstract: Data transfer between a first subscriber having a first IP address and a second subscriber having a second IP address via a tariff-reduced data connection in a data mobile radio network is controlled by a functional unit in the data mobile radio network examining the authorization of the subscribers using the IP addresses of the subscribers involved in the data transfer.Type: ApplicationFiled: January 11, 2005Publication date: September 20, 2007Inventors: Olaf Böhme, Uwe Foll, Thomas Hickethier
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Publication number: 20070029209Abstract: The present invention relates to electrolytes for electrochemically polishing workpieces consisting of titanium, titanium alloys, niobium, niobium alloys, tantalum and tantalum alloys, which electrolytes contain sulfuric acid, ammonium bifluoride and at least one hydroxycarboxylic acid, and a method for electrochemical polishing.Type: ApplicationFiled: April 30, 2004Publication date: February 8, 2007Applicant: POLIGRAT-HOLDING GMBHInventors: Siegfried Piesslinger-Schweiger, Razmik Abedian, Olaf Bohme
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Publication number: 20060072462Abstract: In order to capture utilization charges in a packet data transmission network, a recording is made of the charges that become payable during the course of a transmission session, when a threshold charge-total is reached. It is preferable if the value of the threshold charge-total varies depending on the data speed of the transmission session.Type: ApplicationFiled: November 21, 2005Publication date: April 6, 2006Inventors: Olaf Bohme, Uve Reimer
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Publication number: 20010030946Abstract: In order to capture utilization charges in a packet data transmission network, a recording is made of the charges that become payable during the course of a transmission session, when a threshold charge-total is reached. It is preferable if the value of the threshold charge-total varies depending on the data speed of the transmission session.Type: ApplicationFiled: April 17, 2001Publication date: October 18, 2001Inventors: Olaf Bohme, Uve Reimer
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Patent number: 5882500Abstract: The invention relates to a process for the demetallization of highly acidic baths based on phosphoric acid and sulphuric acid, and also to a process for the electropolishing of stainless-steel surfaces, in which a regeneration of, in particular, spent electrolyte compositions for electropolishing can be achieved by separate electrolytic reduction of Fe(III) to Fe(II) and subsequent removal of precipitates.Type: GrantFiled: March 4, 1998Date of Patent: March 16, 1999Assignee: Poligrat GmbHInventors: Razmik Abedian, Olaf Bohme, Siegfried Piesslinger-Schweiger