Patents by Inventor Roland Walker
Roland Walker 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: 11957406Abstract: Devices, systems, and methods for resecting tissue are disclosed. In some embodiments, a tissue resecting device may comprise an elongated structure having a longitudinal axis, the elongated structure comprising an outer sleeve with a distal window configured to receive uterine polyp tissue and an inner sleeve configured to move between a proximal position and a distal position relative to the window. In some further embodiments, the device may also comprise an electrode element coupled to the inner sleeve. In some even further embodiments, the device may include an insulative layer covering at least a portion of the inner sleeve, wherein the tissue resecting device is configured to fail when used to resect tissue more fibrous than uterine polyp tissue.Type: GrantFiled: October 13, 2021Date of Patent: April 16, 2024Assignee: MINERVA SURGICAL, INC.Inventors: Aaron Germain, Michael D. Walker, Jacob Roland, Jan Echeverry
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Patent number: 10843384Abstract: The invention relates to a process for the production of thermoplastic moulding compounds, in particular for the production of acrylonitrile-butadiene-styrene (ABS), wherein at least a first reagent (11) and a second reagent (12) of the thermoplastic moulding compounds are fed to a loop conduit (29) which comprises a static mixer (36), wherein the reagents (11, 12) are pressed in loops through the loop conduit (29) and passing the static mixer (36), whereby the reagents (11, 12) are dispersed to form a dispersion (15) in the static mixer (36). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.Type: GrantFiled: June 9, 2016Date of Patent: November 24, 2020Assignee: INEOS STYROLUTION GROUP GMBHInventors: SangJun Ahn, Wolfgang Fischer, Norbert Niessner, Brian J. Banaszak, Roland Walker, Ula El-Jaby, Achim Stammer, Klaus-Dieter Hungenberg, Bernd Hisgen
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Patent number: 10683372Abstract: The invention relates to graft copolymers (B) composed of an agglomerated graft core (B1) and at least one graft shell (B2) and also to copolymers (C) having an agglomerating effect, a method for producing said graft copolymers (B), thermoplastic molding compositions and also the use of the thermoplastic molding compositions.Type: GrantFiled: March 3, 2016Date of Patent: June 16, 2020Assignee: INEOS STYROLUTION GROUP GMBHInventors: Roland Walker, Gisbert Michels, Brian J. Banaszak, Norbert Niessner
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Patent number: 10525439Abstract: The invention relates to a process for the production of thermoplastic moulding compounds, in particular ABS, wherein at least a first reagent (11) and a second reagent (12) of the thermoplastic moulding compounds are fed to a gear pump (10) which comprises a housing and at least a first gear wheel that is rotatable relative to the housing about a first axis, and a second gear wheel that is rotatable relative to the housing about a second axis, wherein a loop conduit (29) is provided, and wherein the reagents (11, 12) are pressed in a loop through the loop conduit (29) and passing the gear wheels, whereby the reagents (11, 12) are dispersed to form a dispersion (15) in the gear pump (10). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.Type: GrantFiled: April 11, 2016Date of Patent: January 7, 2020Assignee: INEOS STYROLUTION GROUP GMBHInventors: SangJun Ahn, Wolfgang Fischer, Norbert Niessner, Brian J. Banaszak, Roland Walker, Ula El-Jaby, Achim Stammer, Klaus-Dieter Hungenberg, Bernd Hisgen
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Patent number: 10351679Abstract: A process produces a polymer composition (A) containing a styrene copolymer (a) and an impact modifier (b), comprising a copolymer (b1) as graft base and a graft (b2), where the steps of the process are: (1) providing a crosslinked copolymer (b1) made of: (b11) from 70 to 99.99% by weight of a conjugated diene or acrylate, (b12) from 0 to 29% by weight of another comonomer, (b13) from 0 to 10% by weight of crosslinking monomers, and (b14) from 0.01 to 0.7% by weight of a chain-transfer reagent; (2) applying, to the copolymer (b1), at least one graft (b2) comprising: (b21) from 65 to 95% by weight of a vinylaromatic monomer, (b22) from 5 to 35% by weight of acrylonitrile and/or methacrylonitrile, and (b23) from 0 to 30% by weight of monoethylenically unsaturated monomers, thus providing the impact modifier (b); (3) mixing the styrene copolymer (a) and the impact modifier (b), and thus leads to improved mechanical properties of the polymer composition (A).Type: GrantFiled: March 23, 2016Date of Patent: July 16, 2019Assignee: INEOS STYROLUTION GROUP GMBHInventors: Brian J. Banaszak, Roland Walker, Libor Seda, Johannes Barth, Gisbert Michels, Nikolaus Nestle
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Patent number: 10189932Abstract: The present invention relates to a process for the production of styrene graft copolymers comprising addition and graft copolymerization of styrene monomers A1 and vinyl cyanide monomers A2 to a graft base B where the ratio by mass of A1 to A2 in the monomer feed at the end of the monomer feed time is lower than the ration by mass integrated over the entire monomer feed time. The present invention further relates to a graft copolymer obtainable by a process according to the invention, a molding composition comprising such a graft copolymer, and a molding obtained from such a molding composition.Type: GrantFiled: April 24, 2015Date of Patent: January 29, 2019Assignee: INEOS STYROLUTION GROUP GMBHInventors: Roland Walker, Gisbert Michels, Brian J. Banaszak
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Patent number: 10138364Abstract: The invention relates to a thermoplastic composition containing the components A and B and optionally the additional components C and D, the sum of which equals 100 wt. %. The molding compound consists of: a) 60 to 75 wt. % of one or more styrene copolymers A, b) 25 to 40 wt. % of one or more graft copolymers B, c) 0 to 15 wt. % of a rubber C which is different from component B, and d) 0 to 5 wt. % of one or more additives D. The composition contains 0.2 to 3.0 wt. %, based on the total weight of the components A to D, of oligomers, can be readily processed, and leads to scratch-resistant molded parts.Type: GrantFiled: January 27, 2015Date of Patent: November 27, 2018Assignee: INEOS STYROLUTION GROUP GMBHInventors: Norbert Niessner, Philipp Boeckmann, Roland Walker, Marcus Reining
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Patent number: 10059791Abstract: The invention relates to thermoplastic ABS molding compositions comprising components A) and B): A) from 5 to 80% by weight of a graft polymer A) having bimodal particle size distribution; and B) from 20 to 95% by weight of a thermoplastic polymer B) having a viscosity number VN of from 50 to 120 ml/g. The invention further relates to a process for the preparation of graft copolymer A and to the graft copolymer made by that process.Type: GrantFiled: April 16, 2014Date of Patent: August 28, 2018Assignee: INEOS STYROLUTION GROUP GMBHInventors: Norbert Niessner, SangJun Ahn, Rudy Verstraeten, Gisbert Michels, Florian Patcas, YoungHwa Hwang, Brian J. Banaszak, Roland Walker, Michel Pepers, Johannes Barth
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Publication number: 20180178411Abstract: The invention relates to a process for the production of thermoplastic moulding compounds, in particular for the production of acrylonitrile-butadiene-styrene (ABS), wherein at least a first reagent (11) and a second reagent (12) of the thermoplastic moulding compounds are fed to a loop conduit (29) which comprises a static mixer (36), wherein the reagents (11, 12) are pressed in loops through the loop conduit (29) and passing the static mixer (36), whereby the reagents (11, 12) are dispersed to form a dispersion (15) in the static mixer (36). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.Type: ApplicationFiled: June 9, 2016Publication date: June 28, 2018Inventors: SangJun AHN, Wolfgang FISCHER, Norbert NIESSNER, Brian J. BANASZAK, Roland WALKER, Ula EL-JABY, Achim STAMMER, Klaus-Dieter HUNGENBERG, Bernd HISGEN
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Publication number: 20180179315Abstract: The present invention relates to a process for the production of styrene graft copolymers comprising addition and graft copolymerization of styrene monomers A1 and vinyl cyanide monomers A2 to a graft base B where the ratio by mass of A1 to A2 in the monomer feed at the end of the monomer feed time is lower than the ration by mass integrated over the entire monomer feed time. The present invention further relates to a graft copolymer obtainable by a process according to the invention, a molding composition comprising such a graft copolymer, and a molding obtained from such a molding composition.Type: ApplicationFiled: April 24, 2015Publication date: June 28, 2018Inventors: Roland WALKER, Gisbert MICHELS, Brian J. BANASZAK
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Publication number: 20180085732Abstract: The invention relates to a process for the production of thermoplastic moulding compounds, in particular ABS, wherein at least a first reagent (11) and a second reagent (12) of the thermoplastic moulding compounds are fed to a gear pump (10) which comprises a housing and at least a first gear wheel that is rotatable relative to the housing about a first axis, and a second gear wheel that is rotatable relative to the housing about a second axis, wherein a loop conduit (29) is provided, and wherein the reagents (11, 12) are pressed in a loop through the loop conduit (29) and passing the gear wheels, whereby the reagents (11, 12) are dispersed to form a dispersion (15) in the gear pump (10). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.Type: ApplicationFiled: April 11, 2016Publication date: March 29, 2018Inventors: SangJun AHN, Wolfgang FISCHER, Norbert NIESSNER, Brian J. BANASZAK, Roland WALKER, Ula EL-JABY, Achim STAMMER, Klaus-Dieter HUNGENBERG, Bernd HISGEN
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Publication number: 20180066117Abstract: A process produces a polymer composition (A) containing a styrene copolymer (a) and an impact modifier (b), comprising a copolymer (b1) as graft base and a graft (b2), where the steps of the process are: (1) providing a crosslinked copolymer (b1) made of: (b11) from 70 to 99.99% by weight of a conjugated diene or acrylate, (b12) from 0 to 29% by weight of another comonomer, (b13) from 0 to 10% by weight of crosslinking monomers, and (b14) from 0.01 to 0.7% by weight of a chain-transfer reagent; (2) applying, to the copolymer (b1), at least one graft (b2) comprising: (b21) from 65 to 95% by weight of a vinylaromatic monomer, (b22) from 5 to 35% by weight of acrylonitrile and/or methacrylonitrile, and (b23) from 0 to 30% by weight of monoethylenically unsaturated monomers, thus providing the impact modifier (b); (3) mixing the styrene copolymer (a) and the impact modifier (b), and thus leads to improved mechanical properties of the polymer composition (A).Type: ApplicationFiled: March 23, 2016Publication date: March 8, 2018Inventors: Brian J. BANASZAK, Roland WALKER, Libor SEDA, Johannes BARTH, Gisbert MICHELS, Nikolaus NESTLE
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Publication number: 20180044443Abstract: The invention relates to graft copolymers (B) composed of an agglomerated graft core (B1) and at least one graft shell (B2) and also to copolymers (C) having an agglomerating effect, a method for producing said graft copolymers (B), thermoplastic molding compositions and also the use of the thermoplastic molding compositions.Type: ApplicationFiled: March 3, 2016Publication date: February 15, 2018Inventors: Roland WALKER, Gisbert MICHELS, Brian J. BANASZAK, Norbert NIESSNER
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Patent number: 9708483Abstract: The invention relates to thermoplastic moulding materials based on acrylonitrile-butadiene-styrene, comprising a SAN-polymer matrix and a graft copolymer, structured from an agglomerated butadiene rubber-graft base and a SAN-graft envelope. The agglomerated graft base has a bimodal particle size distribution of a fraction x) of non-agglomerated particles having a d50-value in the range from 80 to 120 nm and a fraction y) of agglomerated particles having a d50-value in the range from 350 to 550 nm and a polydispersity U of less than 0.28. The invention further relates to a method for producing the graft copolymer, wherein an acrylate copolymer having a polydispersity U of less than 0.27 and a d50-value of 100 to 150 nm is used for agglomeration. The invention further relates to the use of thermoplastic moulding materials for producing moulded parts.Type: GrantFiled: April 16, 2014Date of Patent: July 18, 2017Assignee: INEOS STYROLUTION GROUP GMBHInventors: Norbert Niessner, SangJun Ahn, Roland Walker, Michel Pepers, Brian J. Banaszak, Johannes Barth, Gisbert Michels, Florian Patcas, YoungHwa Hwang, Rudy Verstraeten
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Publication number: 20170152325Abstract: A process for preparing an ABS graft copolymer, which comprises a step for isolating the graft copolymer B present in an aqueous dispersion by means of a precipitant which is an aqueous solution of a mixture of MgSO4, Al2(SO4) and/or H2SO4, is described. The ABS molding compositions obtained have an improved yellowness index and high surface gloss.Type: ApplicationFiled: June 17, 2015Publication date: June 1, 2017Inventors: Roland WALKER, Sabine OEPEN, Gisbert MICHELS
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Patent number: 9624333Abstract: The invention relates to thermoplastic molding materials based on acrylonitrile-butadiene-styrene, comprising a SAN-polymer matrix and a graft copolymer, structured from an agglomerated rubber-graft base and a SAN-graft envelope. The basis of the graft base is a diene rubber having a vinyl-aromatic ratio of 10.5 to 24.5 wt %. The agglomerated graft base has a bimodal particle size distribution of a fraction x) of non-agglomerated particles having a d50-value in the range from 80 to 120 nm and a fraction y) of agglomerated particles having a d50-value in the range of 350 to 550 nm and a polydispersity U of less than 0.28. The invention further relates to a method for producing the graft copolymer, wherein an acrylate copolymer having a polydispersity U of less than 0.27 and a d50-value of 100 to 150 nm is used for agglomeration. The invention further relates to the use of thermoplastic molding materials for producing molded parts.Type: GrantFiled: April 16, 2014Date of Patent: April 18, 2017Assignee: INEOS STYROLUTION GROUP GMBHInventors: Norbert Niessner, SangJun Ahn, Brian J. Banaszak, Roland Walker, Michel Pepers, Johannes Barth, Gisbert Michels, Florian Patcas, YoungHwa Hwang, Rudy Verstraeten
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Publication number: 20160340504Abstract: The invention relates to a thermoplastic composition containing the components A and B and optionally the additional components C and D, the sum of which equals 100 wt. %. The molding compound consists of: a) 60 to 75 wt. % of one or more styrene copolymers A, b) 25 to 40 wt. % of one or more graft copolymers B, c) 0 to 15 wt. % of a rubber C which is different from component B, and d) 0 to 5 wt.% of one or more additives D. The composition contains 0.2 to 3.0 wt. %, based on the total weight of the components A to D, of oligomers, can be readily processed, and leads to scratch-resistant molded parts.Type: ApplicationFiled: January 27, 2015Publication date: November 24, 2016Inventors: Norbert NIESSNER, Philipp BOECKMANN, Roland WALKER, Marcus REINING
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Publication number: 20160304652Abstract: The invention relates to thermoplastic ABS molding compositions comprising components A) and B): A) from 5 to 80% by weight of a graft polymer A) having bimodal particle size distribution made from, based on A), a1) from 40 to 90% by weight of graft base a1), obtainable by polymerization of, based on a1), a11) from 75.5 to 89.5% by weight of at least one conjugated diene, a12) from 10.5 to 24.Type: ApplicationFiled: April 16, 2014Publication date: October 20, 2016Inventors: Norbert NIESSNER, SangJun AHN, Rudy VERSTRAETEN, Gisbert MICHELS, Florian PATCAS, YoungHwa HWANG, Brian J. BANASZAK, Roland WALKER, Michel PEPERS, Johannes BARTH
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Publication number: 20160083572Abstract: The invention relates to thermoplastic moulding materials based on acrylonitrile-butadiene-styrene, comprising a SAN-polymer matrix and a graft copolymer, structured from an agglomerated butadiene rubber-graft base and a SAN-graft envelope. The agglomerated graft base has a bimodal particle size distribution of a fraction x) of non-agglomerated particles having a d50-value in the range from 80 to 120 nm and a fraction y) of agglomerated particles having a d50-value in the range from 350 to 550 nm and a polydispersity U of less than 0.28. The invention further relates to a method for producing the graft copolymer, wherein an acrylate copolymer having a polydispersity U of less than 0.27 and a d50-value of 100 to 150 nm is used for agglomeration. The invention further relates to the use of thermoplastic moulding materials for producing moulded parts.Type: ApplicationFiled: April 16, 2014Publication date: March 24, 2016Inventors: Norbert NIESSNER, SangJun AHN, Roland WALKER, Michel PEPERS, Brian J. BANASZAK, Johannes BARTH, Gisbert MICHELS, Florian PATCAS, YoungHwa HWANG, Rudy VERSTRAETEN
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Publication number: 20160075813Abstract: The invention relates to thermoplastic moulding materials based on acrylonitrile-butadiene-styrene, comprising a SAN-polymer matrix and a graft copolymer, structured from an agglomerated rubber-graft base and a SAN-graft envelope. The basis of the graft base is a diene rubber having a vinyl-aromatic ratio of 10.5 to 24.5 wt %. The agglomerated graft base has a bimodal particle size distribution of a fraction x) of non-agglomerated particles having a d50-value in the range from 80 to 120 nm and a fraction y) of agglomerated particles having a d50-value in the range of 350 to 550 nm and a polydispersity U of less than 0.28. The invention further relates to a method for producing the graft copolymer, wherein an acrylate copolymer having a polydispersity U of less than 0.27 and a d50-value of 100 to 150 nm is used for agglomeration. The invention further relates to the use of thermoplastic moulding materials for producing moulded parts.Type: ApplicationFiled: April 16, 2014Publication date: March 17, 2016Inventors: Norbert NIESSNER, SangJun AHN, Brian J. BANASZAK, Roland WALKER, Michel PEPERS, Johannes BARTH, Gisbert MICHELS, Florian PATCAS, YoungHwa HWANG, Rudy VERSTRAETEN