Patents Assigned to Quadrant EPP AG
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Patent number: 9640381Abstract: Internal components of plasma reactors are composed of a toleratable, ceramic filled plasma-useful polymer such as a high temperature engineering thermoplastic, preferably a polyamideimide or polybenzimidazole. The parts exhibit a low erosion rate upon exposure to plasma at low pressure.Type: GrantFiled: April 10, 2012Date of Patent: May 2, 2017Assignee: QUADRANT EPP AGInventors: Scott Howard Williams, Richard William Campbell, Stephan Glander
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Patent number: 9205611Abstract: Composite gear blanks are manufactured by placing a rigid centerpiece in a mold, optionally inertizing the mold, filling the mold by adding a liquid reactive mixture around the centerpiece, applying static pressure to the mold and polymerizing the reactive mixture so as to form a plastic outer part surrounding the centerpiece. The composite gear blanks thus made have improved values of normal and shear adhesion strength both at room temperature and at elevated temperatures of up to 120° C. and are particularly suited for making worm gear parts of automotive electronic power steering systems.Type: GrantFiled: March 17, 2010Date of Patent: December 8, 2015Assignee: QUADRANT EPP AGInventors: Rob Oolderink, Ermanno Nizzoli, Hendrik Vandenbruaene
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Patent number: 9129795Abstract: Internal components of plasma reactors are composed of a toleratable, ceramic filled plasma-useful polymer such as a high temperature engineering thermoplastic, preferably a polyamideimide. The parts exhibit a low erosion rate upon exposure to plasma at low pressure.Type: GrantFiled: April 11, 2011Date of Patent: September 8, 2015Assignee: QUADRANT EPP AGInventors: Scott Howard Williams, Richard William Campbell, Stephan Glander
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Publication number: 20150041433Abstract: Internal components of plasma reactors are composed of a toleratable, ceramic filled plasma-useful polymer such as a high temperature engineering thermoplastic, preferably a polyamideimide or polybenzimidazole. The parts exhibit a low erosion rate upon exposure to plasma at low pressure.Type: ApplicationFiled: April 10, 2012Publication date: February 12, 2015Applicant: QUADRANT EPP AGInventors: Scott Howard Williams, Richard William Campbell, Stephan Glander
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Publication number: 20140213710Abstract: White or near-white antistatic ultra-high molecular weight polyethylene (UHMWPE) is obtained by consolidating a mixture of UHMWPE powder and an organic antistat at high pressure and elevated temperature. The organic antistat is preferably a non-ionic solid which has been cryogenically ground to fine particle size.Type: ApplicationFiled: January 28, 2013Publication date: July 31, 2014Applicant: QUADRANT EPP AGInventors: Uwe Hollad, Matthias Luebbering, David Didier
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Publication number: 20120255854Abstract: Internal components of plasma reactors are composed of a toleratable, ceramic filled plasma-useful polymer such as a high temperature engineering thermoplastic, preferably a polyamideimide. The parts exhibit a low erosion rate upon exposure to plasma at low pressure.Type: ApplicationFiled: April 11, 2011Publication date: October 11, 2012Applicant: QUADRANT EPP AGInventors: Scott Howard Williams, Richard William Campbell, Stephan Glander
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Publication number: 20120000307Abstract: Composite gear blanks are manufactured by placing a rigid centerpiece in a mold, optionally inertizing the mold, filling the mold by adding a liquid reactive mixture around the centerpiece, applying static pressure to the mold and polymerizing the reactive mixture so as to form a plastic outer part surrounding the centerpiece. The composite gear blanks thus made have improved values of normal and shear adhesion strength both at room temperature and at elevated temperatures of up to 120° C. and are particularly suited for making worm gear parts of automotive electronic power steering systems.Type: ApplicationFiled: March 17, 2010Publication date: January 5, 2012Applicant: QUADRANT EPP AGInventors: Rob Oolderink, Ermanno Nizzoli, Hendrik Vandenbruaene
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Patent number: 8022115Abstract: It has now been surprisingly and unexpectedly discovered that a combination of polychlorophenoxyphenol, a silver-containing biocide, and an organopolysiloxane, when added to UHMWPE, renders the UHMWPE resistant to both soft and hard fouling. The polychlorophenoxy phenol is preferably 2.4.4?-trichloro-2?-hydroxy-diphenylether and the metal-containing biocide is preferably a silver zeolite.Type: GrantFiled: September 22, 2009Date of Patent: September 20, 2011Assignee: Quadrant EPP AGInventors: Joseph V. Gregg, Brian Yarcich
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Patent number: 7981349Abstract: UHMWPE panels of large width may be ram extruded from a slit die in a stable process, by restraining a panel which exits the die below the crystalline melt temperature against movement away from the die by a back pressure device, so as to exert a back pressure between the back pressure device and the die, the back pressure device preferably constructed of a plurality of differentially adjustable elements so as to be able to compensate for changes in processing characteristics over time. Vertically restraining UHMWPE panels as they further cool also greatly improves product characteristics.Type: GrantFiled: June 11, 2010Date of Patent: July 19, 2011Assignee: Quadrant EPP AGInventors: Joseph V. Gregg, Wesley Allen Kohler
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Patent number: 7980839Abstract: Wide panels of UHMWPE having exceptional flatness and surface quality are ram extruded through a slit die equipped with a plurality of individually adjustable cooling zones proximate the panel exit slit and transverse to the machine direction, which cool the panel while the panel is restrained by a back pressure device and preferably a vertical movement restraint. The process is robust and can be run for long product campaigns.Type: GrantFiled: March 23, 2010Date of Patent: July 19, 2011Assignee: Quadrant EPP AGInventors: Joseph V. Gregg, Wesley Allen Kohler, Lyle D. Berning
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Publication number: 20110070454Abstract: It has now been surprisingly and unexpectedly discovered that a combination of polychlorophenoxyphenol, a silver-containing biocide, and an organopolysiloxane, when added to UHMWPE, renders the UHMWPE resistant to both soft and hard fouling. The polychlorophenoxy phenol is preferably 2.4.4?-trichloro-2?-hydroxy-diphenylether and the metal-containing biocide is preferably a silver zeolite.Type: ApplicationFiled: September 22, 2009Publication date: March 24, 2011Applicant: QUADRANT EPP AGInventors: Joseph V. Gregg, Brian Yarcich
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Patent number: 7803450Abstract: UHMWPE panels of large width may be prepared by a continuous ram extrusion process by employing a slit die which preferably narrows from both sides in a direction transverse to the machine direction, and/or which employs a plurality of transversely positioned cooling zones located on the top and the bottom of the die, proximate the exit thereof. The panel exits the die at a temperature lower than the crystalline melt temperature.Type: GrantFiled: July 21, 2006Date of Patent: September 28, 2010Assignee: Quadrant EPP AGInventors: Joseph V. Gregg, Wesley Allen Kohler
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Patent number: 7758797Abstract: UHMWPE panels of large width may be prepared by a continuous ram extrusion process by employing a slit die which preferably narrows from both sides in a direction transverse to the machine direction, and/or which employs a plurality of transversely positioned cooling zones located on the top and the bottom of the die, proximate the exit thereof. The panel exits the die at a temperature lower than the crystalline melt temperature.Type: GrantFiled: July 21, 2006Date of Patent: July 20, 2010Assignee: Quadrant EPP AGInventors: Joseph V. Gregg, Wesley Allen Kohler, Lyle D. Berning
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Patent number: 7758796Abstract: UHMWPE panels of large width may be ram extruded from a slit die in a stable process, by restraining a panel which exits the die below the crystalline melt temperature against movement away from the die by a back pressure device, so as to exert a back pressure between the back pressure device and the die, the back pressure device preferably constructed of a plurality of differentially adjustable elements so as to be able to compensate for changes in processing characteristics over time. Vertically restraining UHMWPE panels as they further cool also greatly improves product characteristics.Type: GrantFiled: July 21, 2006Date of Patent: July 20, 2010Assignee: Quadrant EPP AGInventors: Joseph V. Gregg, Wesley Allen Kohler
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Publication number: 20100173030Abstract: Wide panels of UHMWPE having exceptional flatness and surface quality are ram extruded through a slit die equipped with a plurality of individually adjustable cooling zones proximate the panel exit slit and transverse to the machine direction which cool the by a back pressure device and preferably a vertical movement restraint. The process is robust and can be run for long product campaigns.Type: ApplicationFiled: March 23, 2010Publication date: July 8, 2010Applicant: QUADRANT EPP AGInventors: Joseph V. Gregg, Wesley Allen Kohler, Lyle D. Berning
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Patent number: 7736579Abstract: Wide panels of UHMWPE having exceptional flatness and surface quality are ram extruded through a slit die equipped with a plurality of individually adjustable cooling zones proximate the panel exit slit and transverse to the machine direction which cool the by a back pressure device and preferably a vertical movement restraint. The process is robust and can be run for long product campaigns.Type: GrantFiled: July 13, 2007Date of Patent: June 15, 2010Assignee: Quadrant EPP AGInventors: Joseph V. Gregg, Wesley Allen Kohler, Lyle D. Berning
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Publication number: 20080018026Abstract: Wide panels of UHMWPE having exceptional flatness and surface quality are ram extruded through a slit die equipped with a plurality of individually adjustable cooling zones proximate the panel exit slit and transverse to the machine direction which cool the by a back pressure device and preferably a vertical movement restraint. The process is robust and can be run for long product campaigns.Type: ApplicationFiled: July 13, 2007Publication date: January 24, 2008Applicant: QUADRANT EPP AG.Inventors: Joseph V. Gregg, Wesley Allen Kohler, Lyle D. Berning