Patents by Inventor Angel Stoyanov

Angel Stoyanov 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).

  • Publication number: 20210246247
    Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.
    Type: Application
    Filed: April 27, 2021
    Publication date: August 12, 2021
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: Karen Brogan, Charles E. Miller, Angel Stoyanov, Torsten Lindner, Maike Siemons
  • Publication number: 20200181840
    Abstract: Bleached polycrylic acid crosslinked cellulose fibers with reduced furfural content are disclosed. The reduced furfural content is accompanied by a strong reduction of malodor associated with crosslinked fibers. Methods of furfural reduction include treatment with hydrogen peroxide in the absence of alkaline or other bleaching agents subsequent to curing polyacrylic acid crosslinked cellulose fibers. Some embodiments of treated polycrylic acid crosslinked cellulose fibers have a furfural content lower than 1.3 ppm. In some embodiments, the reduction of furfural content of the treated crosslinked fibers compared to untreated crosslinked fibers is at least 55%. in some embodiments, furfural content decreases with aging of the treated crosslinked fibers.
    Type: Application
    Filed: February 11, 2020
    Publication date: June 11, 2020
    Applicant: International Paper Company
    Inventors: Angel Stoyanov, Joerg Endres, Holger Beruda, Ludwig Busam
  • Publication number: 20200087435
    Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.
    Type: Application
    Filed: August 23, 2019
    Publication date: March 19, 2020
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: Karen Brogan, Charles E. Miller, Angel Stoyanov, Torsten Lindner, Maike Siemons
  • Patent number: 10343316
    Abstract: A method for manufacturing a hollow overmolded polymeric article comprising: positioning a hollow polymeric structure (10) in a mold (100); supporting the interior surface of the hollow polymeric structure; disposing a fibrous polymeric material (12) into the mold proximal to the outer surface of the hollow polymeric structure; overmolding the fibrous polymeric material onto to the outer surface of the hollow polymeric structure; opening the mold; and removing a hollow overmolded polymeric article comprising the fibrous polymeric material overmolded on the hollow polymeric structure.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: July 9, 2019
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Tim Willem Joseph Leonard Dassen, Davy Wilhelmus Anna Brands, Claire Martin, Angel Stoyanov Yanev
  • Patent number: 10337150
    Abstract: Grafted, crosslinked cellulosic materials used in absorbent articles, the grafted crosslinked cellulosic materials including cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of the cellulose fibers and the polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: July 2, 2019
    Assignee: The Procter & Gamble Company
    Inventors: Karen Brogan, Charles E. Miller, Angel Stoyanov, Torsten Lindner, Maike Siemons
  • Patent number: 10287383
    Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: May 14, 2019
    Assignee: INTERNATIONAL PAPER COMPANY
    Inventors: Karen Brogan, Charles E. Miller, Angel Stoyanov, Torsten Lindner, Maike Siemons
  • Publication number: 20190118434
    Abstract: A process of making a part with improved mechanical performance and improved impact performance compared to a solid part with a same weight by a disclosed foaming process. The process including introducing a glass fiber filled polymeric material to a hopper (128) of an injection molding machine, melting the glass fiber filled polymeric material to form a melt in a plasticizing unit (100), and pressurizing the plasticizing unit (100) of the injection molding machine with a blowing agent. The process further including dissolving the blowing agent into the melt, injecting the melt into a mold cavity (408) of a mold up to 100% of volume, and reconfiguring the mold to increase a size of the mold cavity (408) after a predetermined time after a delivery of the melt. A part made by the process and the device for making the part are also disclosed.
    Type: Application
    Filed: April 11, 2017
    Publication date: April 25, 2019
    Inventors: Angel Stoyanov Yanev, Davy Wilhelmus Anna Brands, Josephus Gerardus Maria Van Gisbergen
  • Patent number: 9981534
    Abstract: In an embodiment, a vehicle component for a vehicle can comprise: a carrier comprising a top portion, a bottom portion, a first side portion, and a second side portion; a cavity, wherein the cavity comprises a bottom cavity wall, cavity side walls, and a top portion of the cavity having an upper cavity wall; an insert covering at least a portion of the cavity and attached to the upper cavity wall, the bottom cavity wall, and/or the cavity side walls; and a cover attached to the carrier.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: May 29, 2018
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Tim Willem Joseph Leonard Dassen, Davy Wilhelmus Anna Brands, Claire Marie-Annick Martin, Angel Stoyanov Yanev, Geert Jan Schellekens
  • Publication number: 20180087216
    Abstract: Bleached polyacrylic acid crosslinked cellulose fibers with reduced furfural content are disclosed. The reduced furfural content is accompanied by a strong reduction of malodor associated with crosslinked fibers. Methods of furfural reduction include treatment with hydrogen peroxide in the absence of alkaline or other bleaching agents subsequent to curing polyacrylic acid crosslinked cellulose fibers. Some embodiments of treated polyacrylic acid crosslinked cellulose fibers have a furfural content lower than 1.3 ppm. In some embodiments, the reduction of furfural content of the treated crosslinked fibers compared to untreated crosslinked fibers is at least 55%. In some embodiments, furfural content decreases with aging of the treated crosslinked fibers.
    Type: Application
    Filed: December 1, 2017
    Publication date: March 29, 2018
    Applicant: International Paper Company
    Inventors: Angel Stoyanov, Joerg Endres, Holger Beruda, Ludwig Busam
  • Publication number: 20170129148
    Abstract: A method for manufacturing a hollow overmolded polymeric article comprising: positioning a hollow polymeric structure (10) in a mold (100); supporting the interior surface of the hollow polymeric structure; disposing a fibrous polymeric material (12) into the mold proximal to the outer surface of the hollow polymeric structure; overmolding the fibrous polymeric material onto to the outer surface of the hollow polymeric structure; opening the mold; and removing a hollow overmolded polymeric article comprising the fibrous polymeric material overmolded on the hollow polymeric structure.
    Type: Application
    Filed: July 1, 2015
    Publication date: May 11, 2017
    Applicant: SABIC Global Technologies B.V.
    Inventors: Tim Willem Joseph Leonard Dassen, Davy Wilhelmus Anna Brands, Claire Martin, Angel Stoyanov Yanev
  • Publication number: 20170066865
    Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.
    Type: Application
    Filed: November 18, 2016
    Publication date: March 9, 2017
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: Karen Brogan, Charles E. Miller, Angel Stoyanov, Torsten Linder, Maike Siemons
  • Publication number: 20170022671
    Abstract: Grafted, crosslinked cellulosic materials used in absorbent articles, the grafted crosslinked cellulosic materials including cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of the cellulose fibers and the polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains.
    Type: Application
    Filed: July 24, 2015
    Publication date: January 26, 2017
    Inventors: Karen BROGAN, Charles E. MILLER, Angel STOYANOV, Torsten LINDNER, Maike SIEMONS
  • Publication number: 20170022314
    Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.
    Type: Application
    Filed: July 24, 2015
    Publication date: January 26, 2017
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: Karen BROGAN, Charles E. MILLER, Angel STOYANOV, Torsten LINDER, Maike SIEMONS
  • Publication number: 20160229271
    Abstract: In an embodiment, a vehicle component for a vehicle can comprise: a carrier comprising a top portion, a bottom portion, a first side portion, and a second side portion; a cavity, wherein the cavity comprises a bottom cavity wall, cavity side walls, and a top portion of the cavity having an upper cavity wall; an insert covering at least a portion of the cavity and attached to the upper cavity wall, the bottom cavity wall, and/or the cavity side walls; and a cover attached to the carrier.
    Type: Application
    Filed: October 7, 2014
    Publication date: August 11, 2016
    Inventors: Tim Willem Joseph Leonard Dassen, Davy Wilhelmus Anna Brands, Claire Marie-Annick Martin, Angel Stoyanov Yanev, Geert Jan Schellekens
  • Patent number: 9205405
    Abstract: Absorbent articles comprising bleached polycrylic acid crosslinked cellulose fibers with reduced furfural content are disclosed. The reduced furfural content is accompanied by a strong reduction of malodor associated with crosslinked fibers. Methods of furfural reduction include treatment with hydrogen peroxide in the absence of alkaline or other bleaching agents subsequent to curing polyacrylic acid crosslinked cellulose fibers. Some embodiments of treated polycrylic acid crosslinked cellulose fibers have a furfural content lower than 1.3 ppm. In some embodiments, the reduction of furfural content of the treated crosslinked fibers compared to untreated crosslinked fibers is at least 55%. In some embodiments, furfural content decreases with aging of the treated crosslinked fibers.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: December 8, 2015
    Assignee: The Procter & Gamble Company
    Inventors: Jorg Endres, Holger Beruda, Ludwig Busam, Angel Stoyanov
  • Publication number: 20150321171
    Abstract: Absorbent articles comprising bleached polycrylic acid crosslinked cellulose fibers with reduced furfural content are disclosed. The reduced furfural content is accompanied by a strong reduction of malodor associated with crosslinked fibers. Methods of furfural reduction include treatment with hydrogen peroxide in the absence of alkaline or other bleaching agents subsequent to curing polyacrylic acid crosslinked cellulose fibers. Some embodiments of treated polycrylic acid crosslinked cellulose fibers have a furfural content lower than 1.3 ppm. In some embodiments, the reduction of furfural content of the treated crosslinked fibers compared to untreated crosslinked fibers is at least 55%. In some embodiments, furfural content decreases with aging of the treated crosslinked fibers.
    Type: Application
    Filed: May 6, 2014
    Publication date: November 12, 2015
    Applicant: The Procter & Gamble Company
    Inventors: Jorg ENDRES, Holger Beruda, Ludwig Busam, Angel Stoyanov
  • Publication number: 20150322626
    Abstract: Bleached polycrylic acid crosslinked cellulose fibers with reduced furfural content are disclosed. The reduced furfural content is accompanied by a strong reduction of malodor associated with crosslinked fibers. Methods of furfural reduction include treatment with hydrogen peroxide in the absence of alkaline or other bleaching agents subsequent to curing polyacrylic acid crosslinked cellulose fibers. Some embodiments of treated polycrylic acid crosslinked cellulose fibers have a furfural content lower than 1.3 ppm. In some embodiments, the reduction of furfural content of the treated crosslinked fibers compared to untreated crosslinked fibers is at least 55%. In some embodiments, furfural content decreases with aging of the treated crosslinked fibers.
    Type: Application
    Filed: May 6, 2014
    Publication date: November 12, 2015
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: Angel Stoyanov, Joerg Endres, Holger Beruda, Ludwig Busam
  • Patent number: 8722797
    Abstract: A crosslinked cellulose fiber that has been crosslinked with a low molecular weight polyacrylic acid crosslinking agent, having phosphorous incorporated into the polymer chain and a method of crosslinking the fiber.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: May 13, 2014
    Assignee: Weyerhaeuser NR Company
    Inventors: Angel Stoyanov, Charles E. Miller
  • Patent number: 8475631
    Abstract: The process of making crosslinked cellulose pulp fiber comprising plasma treating a sheet of cellulose pulp fiber before the sheet is impregnated with a crosslinking formulation which comprises a crosslinking agent and a catalyst, then defiberizing the treated cellulose pulp sheet to form treated defiberized cellulose pulp, then heating and curing the treated defiberized cellulose pulp to form intrafiber crosslinked cellulose pulp fibers.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: July 2, 2013
    Assignee: Wyerhauser NR Company
    Inventors: Angel Stoyanov, Charles E. Miller
  • Publication number: 20120004406
    Abstract: An intrafiber crosslinked cellulose pulp fiber manufactured from plasma-treated pulp sheet. The crosslinked fiber can have lower sonic knots than an untreated pulp sheet.
    Type: Application
    Filed: June 30, 2010
    Publication date: January 5, 2012
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: ANGEL STOYANOV, CHARLES E. MILLER