Patents by Inventor David C. Krueger
David C. Krueger 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: 7648653Abstract: A conductive polyoxymethylene composition comprising a first polyoxymethylene component, a conductive filler, at least one boron oxyacid or salt thereof, and at least one first polyamide oligomer is disclosed. The first polyoxymethylene component comprises a copolymer of oxymethylene, a homopolymer of oxymethylene, and mixtures thereof, and is present in an amount of from about 50 to about 99.5 weight percent based on the total weight of the composition. The conductive filler is present in an amount of from about 0.1 to about 40 percent by weight based on the total weight of the composition. The boron oxyacid or salt thereof and the first polyamide oligomer stabilize the composition such that articles formed therefrom exhibit reduced or eliminated deterioration. Further, when exposed to higher temperature, pressure, and high-fuel content environments, the articles maintain the desired physical properties.Type: GrantFiled: January 12, 2006Date of Patent: January 19, 2010Assignee: BASF SEInventors: David C. Krueger, Majiid Khalatbri, Wolfgang Heim, Theodore Zavadil
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Patent number: 7336969Abstract: A multi-channel communications system for communications between a mobile units and dispatch agencies through tower sites under control of a multi-channel communication controller. The method of communications used is time division multiple access with provisions for alternate methods. The mobile units and dispatch agencies have forms of identifications to route messages between the mobile units and dispatch agencies according to the forms of identification. The forms of identification are resolved from one form to another to operate with the alternate methods of communications. The mobile units are handed off from one communications channel to another by the multi-channel controller as channel loading conditions exceed a predetermined limit. Mobile units change tower sites as the geographic coverage of a tower site changes.Type: GrantFiled: March 10, 2005Date of Patent: February 26, 2008Assignee: Continental Automotive Systems US, Inc.Inventors: James A. Minnick, Michael A. Bueter, Jeffrey D. Coil, David C. Krueger
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Patent number: 6950658Abstract: A multi-channel communications system for communications between a mobile units and dispatch agencies through tower sites under control of a multi-channel communication controller. The method of communications used is time division multiple access with provisions for alternate methods. The mobile units and dispatch agencies have forms of identifications to route messages between the mobile units and dispatch agencies according to the forms of identification. The forms of identification are resolved from one form to another to operate with the alternate methods of communications. The mobile units are handed off from one communications channel to another by the multi-channel controller as channel loading conditions exceed a predetermined limit. Mobile units change tower sites as the geographic coverage of a tower site changes.Type: GrantFiled: September 6, 2001Date of Patent: September 27, 2005Assignee: Siemens VDO Automotive CorporationInventors: James A. Minnick, Michael A. Bueter, Jeffrey D. Coil, David C. Krueger
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Patent number: 6654682Abstract: An off-line transit planning and management system is disclosed. The off-line transit planning and management system is to be integrated into an on-line transit and management planning system. The process disclosed includes logging timepoints and generating route, pattern, block, and schedule information therefrom to be supplied to a database that is connected to a real-time transit management system.Type: GrantFiled: January 11, 2001Date of Patent: November 25, 2003Assignee: Siemens Transportation Systems, Inc.Inventors: Roland J. Kane, David C. Krueger, Chad Reed, Gareth R. Strope, Richard A. Stanek
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Publication number: 20030144018Abstract: A multi-channel communications system for communications between a mobile units and dispatch agencies through tower sites under control of a multi-channel communication controller. The method of communications used is time division multiple access with provisions for alternate methods. The mobile units and dispatch agencies have forms of identifications to route messages between the mobile units and dispatch agencies according to the forms of identification. The forms of identification are resolved from one form to another to operate with the alternate methods of communications. The mobile units are handed off from one communications channel to another by the multi-channel controller as channel loading conditions exceed a predetermined limit. Mobile units change tower sites as the geographic coverage of a tower site changes.Type: ApplicationFiled: September 6, 2001Publication date: July 31, 2003Applicant: Siemens Transportation Systems, Inc.Inventors: James A. Minnick, Michael A. Bueter, Jeffrey D. Coil, David C. Krueger
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Patent number: 6370381Abstract: A multi-channel communications system for communications between a mobile units and dispatch agencies through tower sites under control of a multi-channel communication controller. The method of communications used is time division multiple access with provisions for alternate methods. The mobile units and dispatch agencies have forms of identifications to route messages between the mobile units and dispatch agencies according to the forms of identification. The forms of identification are resolved from one form to another to operate with the alternate methods of communications. The mobile units are handed off from one communications channel to another by the multi-channel controller as channel loading conditions exceed a predetermined limit. Mobile units change tower sites as the geographic coverage of a tower site changes.Type: GrantFiled: January 29, 1999Date of Patent: April 9, 2002Assignee: Siemens Transportation Systems, Inc.Inventors: James A. Minnick, Michael A. Bueter, Jeffrey D. Coil, David C. Krueger
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Publication number: 20010049581Abstract: An off-line transit planning and management system is disclosed. The off-line transit planning and management system is to be integrated into an on-line transit and management planning system. The process disclosed includes logging timepoints and generating route, pattern, block, and schedule information therefrom to be supplied to a database that is connected to a real-time transit management system.Type: ApplicationFiled: January 11, 2001Publication date: December 6, 2001Applicant: Siemens Transportation Systems, Inc.Inventors: Roland J. Kane, David C. krueger, Chad Reed, Gareth R. Strope, Richard A. Stanek
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Patent number: 5531958Abstract: The present invention provides a method of increasing debinding rates in Powder Injection Molding of metal and ceramic parts by use of a catalytic binding system.Type: GrantFiled: October 17, 1995Date of Patent: July 2, 1996Assignee: BASF CorporationInventor: David C. Krueger
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Patent number: 5453455Abstract: The present invention relates to using lithium salts of an organic material having 2 to 30 carbon atoms and at least one carboxylic acid in a rigid polyurethane formulation to produce foams having energy absorbing properties.Type: GrantFiled: May 3, 1993Date of Patent: September 26, 1995Assignee: BASF CorporationInventors: David C. Krueger, Donald L. Christman, Andreas H. Rothacker, Thomas B. Lee
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Patent number: 5424338Abstract: The invention relates to rigid, open-celled hydrophilic polyurethane foams obtained by reacting in the presence of water as a blowing agent and a polyisocyanate with a polyhydric polyamine initiated polyether polyol. The polyether polyol is initiated with a polyhydric polyamine having three (3) to five (5) active amine hydrogens and has internal blocks of polyoxyethylene groups. The foam retains from 15 to 35 times its weight in water.Type: GrantFiled: August 6, 1992Date of Patent: June 13, 1995Assignee: BASF CorporationInventor: David C. Krueger
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Patent number: 5296516Abstract: Use of a ternary blowing agent mixture containing water, HCFC-22, and either or both of methylene chloride or 1,1,1-trichloroethane allows the preparation of rigid urethane and polyisocyanurate foams displaying good dimensional stability and low aged k-factors.Type: GrantFiled: December 9, 1992Date of Patent: March 22, 1994Assignee: BASF CorporationInventors: David C. Krueger, Curtis J. Reichel
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Patent number: 5264461Abstract: The invention relates to rigid integral skin polyurethane structural foam having high impact strength, high heat distortion, and flame retardant properties. The foam is prepared from triisopropanolamine-initiated polyoxyalkylene (TIPA) polyether polyols oxyalkylated with a compound producing primary hydroxyl functional termination. The polyether polyol is advantageously of a molecular weight sufficient to enable TIPA to flow well while retaining its flame retardant characteristics in the foam.Type: GrantFiled: July 15, 1992Date of Patent: November 23, 1993Assignee: BASF CorporationInventor: David C. Krueger
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Patent number: 5260347Abstract: The present invention relates to low density, water-blown, rigid foams with good physical properties made with blends of toluenediamine (TDA)/glycerine initiated polyols. The foams made using these blends exhibit no initial surface friability. Further, it was found that specific blends of lower hydroxyl number polyols could be used, thereby reducing isocyanate consumption without affecting the physical properties of the foam.Type: GrantFiled: December 4, 1992Date of Patent: November 9, 1993Assignee: BASF CorporationInventors: David C. Krueger, Thomas B. Lee
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Patent number: 5258416Abstract: The present invention relates to using lithium salts of an organic material having 2 to 30 carbon atoms and at least one carboxylic acid in a rigid polyurethane formulation to produce foams having energy absorbing properties.Type: GrantFiled: January 25, 1993Date of Patent: November 2, 1993Assignee: BASF CorporationInventors: David C. Krueger, Donald L. Christman, Andreas H. Rothacker, Thomas B. Lee
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Patent number: 5258418Abstract: The present invention relates to low density, water-blown, rigid foams with good physical properties made with blends of toluenediamine (TDA)/glycerine initiated polyols. The foams made using these blends exhibit no initial surface friability. Further, it was found that specific blends of lower hydroxyl number polyols could be used, thereby reducing isocyanate consumption without affecting the physical properties of the foam.Type: GrantFiled: April 27, 1993Date of Patent: November 2, 1993Assignee: BASF CorporationInventors: David C. Krueger, Thomas B. Lee
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Patent number: 5248703Abstract: The present invention relates to using lithium salts of an organic material having 2 to 30 carbon atoms and at least one carboxylic acid in a rigid polyurethane formulation to produce foams having energy absorbing properties.Type: GrantFiled: March 13, 1992Date of Patent: September 28, 1993Assignee: BASF CorporationInventors: David C. Krueger, Donald L. Christman, Andreas H. Rothacker, Thomas B. Lee
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Patent number: 5057544Abstract: The present invention relates to an integral skin rigid polyurethane foam having improved compressive strength and flexural strength. This foam is prepared by reacting a polyol resin component with an aromatic isocyanate using water as an auxiliary blowing agent.Type: GrantFiled: November 16, 1990Date of Patent: October 15, 1991Assignee: BASF CorporationInventors: David J. Ho, David C. Krueger
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Patent number: 4780482Abstract: The invention relates to integral skin rigid polyurethane structural foam having high impact strength, high heat distortion and flame retardant properties. This foam is prepared from a polyol selected from the group consisting of polyoxyalkylene polyether polyol, a polyester polyol or mixture thereof, an organic polyisocyanate, a chain extender and blowing agent.Type: GrantFiled: May 1, 1987Date of Patent: October 25, 1988Assignee: BASF CorporationInventor: David C. Krueger
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Patent number: 4438224Abstract: Mechanically stable styrene polymer foams having highly desirable physical properties are prepared employing as a blowing agent a mixture of lower alcohols with chlorofluoromethanes.Type: GrantFiled: August 15, 1983Date of Patent: March 20, 1984Assignee: The Dow Chemical CompanyInventors: Kyung W. Suh, David C. Krueger, Burch E. Zehner
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Patent number: 4421866Abstract: Mechanically stable styrene polymer foams having highly desirable physical properties are prepared employing as a blowing agent a mixture of lower alcohols with chlorofluoromethanes.Type: GrantFiled: September 29, 1982Date of Patent: December 20, 1983Assignee: The Dow Chemical CompanyInventors: Kyung W. Suh, David C. Krueger, Burch E. Zehner