Patents by Inventor Ludwig Busam

Ludwig Busam 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: 20230383461
    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: August 14, 2023
    Publication date: November 30, 2023
    Inventors: Angel Stoyanov, Joerg Endres, Holger Beruda, Ludwig Busam
  • Patent number: 11793682
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed having an absorbent core which imparts increased wearing comfort to the article and makes it thin and dry. The absorbent core useful for an absorbent article comprises a substrate layer, a discontinuous layer of absorbent material, and a layer of thermoplastic material. A second surface of the discontinuous layer of absorbent material is in at least partial contact with a first surface of the substrate layer. Portions of a second surface of the layer of thermoplastic material are in direct contact with the first surface of the substrate layer and portions of said second surface of the layer of thermoplastic material are in direct contact with a first surface of the discontinuous layer of absorbent material. A process for providing a storage layer for an absorbent core useful in an absorbent article is further disclosed.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: October 24, 2023
    Assignee: The Procter & Gamble Company
    Inventors: Ludwig Busam, Uwe Jurgen Becker, Michael Divo, Bruno Johannes Ehrnsperger, Roland Engel, Torsten Lindner, Siegfried Link, Volker Maier, Sanaul Kabir Siddiquee, Gabriele Stiehl, Thomas Tombuelt Meyer
  • Patent number: 11725339
    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: Grant
    Filed: February 11, 2020
    Date of Patent: August 15, 2023
    Assignee: INTERNATIONAL PAPER COMPANY
    Inventors: Angel Stoyanov, Joerg Endres, Holger Beruda, Ludwig Busam
  • Patent number: 11234868
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than 50%, preferably of more than 60%, 70%, 80% or 90% according to the Wet Immobilization Test described herein.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: February 1, 2022
    Assignee: The Procter & Gamble Company
    Inventors: Uwe Jurgen Becker, Ludwig Busam, Bruno Johannes Ehrnsperger, Torsten Lindner, Siegfried Link, Volker Maier, Sanaul Kabir Siddiquee, Gabriele Stiehl, Thomas Tombuelt
  • Patent number: 11135096
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized by a thermoplastic fibrous material.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: October 5, 2021
    Assignee: The Procter & Gamble Company
    Inventors: Uwe Jurgen Becker, Ludwig Busam, Bruno Johannes Ehrnsperger, Torsten Lindner, Siegfried Link, Volker Maier, Sanaul Kabir Siddiquee, Gabriele Stiehl, Thomas Tombuelt
  • Publication number: 20200197229
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized by a thermoplastic fibrous material.
    Type: Application
    Filed: March 3, 2020
    Publication date: June 25, 2020
    Inventors: Uwe Jurgen BECKER, Ludwig BUSAM, Bruno Johannes EHRNSPERGER, Torsten LINDNER, Siegfried LINK, Volker MAIER, Sanaul Kabir SIDDIQUEE, Gabriele STIEHL, Thomas TOMBUELT
  • 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
  • Patent number: 10660800
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than 50%, preferably of more than 60%, 70%, 80% or 90% according to the Wet Immobilization Test described herein.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: May 26, 2020
    Assignee: The Procter & Gamble Company
    Inventors: Uwe Jurgen Becker, Ludwig Busam, Bruno Johannes Ehrnsperger, Torsten Lindner, Siegfried Link, Volker Maier, Sanaul Kabir Siddiquee, Gabriele Stiehl, Thomas Tombuelt
  • Publication number: 20190365581
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed having an absorbent core which imparts increased wearing comfort to the article and makes it thin and dry. The absorbent core useful for an absorbent article comprises a substrate layer, a discontinuous layer of absorbent material, and a layer of thermoplastic material. A second surface of the discontinuous layer of absorbent material is in at least partial contact with a first surface of the substrate layer. Portions of a second surface of the layer of thermoplastic material are in direct contact with the first surface of the substrate layer and portions of said second surface of the layer of thermoplastic material are in direct contact with a first surface of the discontinuous layer of absorbent material. A process for providing a storage layer for an absorbent core useful in an absorbent article is further disclosed.
    Type: Application
    Filed: August 15, 2019
    Publication date: December 5, 2019
    Inventors: Ludwig BUSAM, Uwe Jurgen BECKER, Michael DIVO, Bruno Johannes EHRNSPERGER, Roland ENGEL, Torsten LINDNER, Siegfried LINK, Volker MAIER, Sanaul Kabir SIDDIQUEE, Gabriel STIEHL, Thomas TOMBUELT MEYER
  • Patent number: 10470948
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed having an absorbent core which imparts increased wearing comfort to the article and makes it thin and dry. The absorbent core useful for an absorbent article comprises a substrate layer, a discontinuous layer of absorbent material, and a layer of thermoplastic material. A second surface of the discontinuous layer of absorbent material is in at least partial contact with a first surface of the substrate layer. Portions of a second surface of the layer of thermoplastic material are in direct contact with the first surface of the substrate layer and portions of said second surface of the layer of thermoplastic material are in direct contact with a first surface of the discontinuous layer of absorbent material. A process for providing a storage layer for an absorbent core useful in an absorbent article is further disclosed.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: November 12, 2019
    Assignee: The Procter & Gamble Company
    Inventors: Ludwig Busam, Uwe Jurgen Becker, Michael Divo, Bruno Johannes Ehrnsperger, Roland Engel, Torsten Lindner, Siegfried Link, Volker Maier, Sanaul Kabir Siddiquee, Gabriel Stiehl, Thomas Tombuelt-Meyer
  • Publication number: 20190110936
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than 50%, preferably of more than 60%, 70%, 80% or 90% according to the Wet Immobilization Test described herein.
    Type: Application
    Filed: December 17, 2018
    Publication date: April 18, 2019
    Inventors: Uwe Jurgen Becker, Ludwig Busam, Bruno Johannes Ehrnsperger, Torsten Lindner, Siegfried Link, Volker Maier, Sanaul Kabir Siddiquee, Gabriele Stiehl, Thomas Tombuelt
  • 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
  • Patent number: 9763835
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than 50%, preferably of more than 60%, 70%, 80% or 90% according to the Wet Immobilization Test described herein.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: September 19, 2017
    Assignee: The Procter & Gamble Company
    Inventors: Uwe Jurgen Becker, Ludwig Busam, Bruno Johannes Ehrnsperger, Torsten Lindner, Siegfried Link, Volker Maier, Sanaul Kabir Siddiquee, Gabriele Stiehl, Thomas Tombuelt
  • 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: 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
  • 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: 20150133882
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than 50%, preferably of more than 60%, 70%, 80% or 90% according to the Wet Immobilization Test described herein.
    Type: Application
    Filed: December 11, 2014
    Publication date: May 14, 2015
    Inventors: Uwe Jurgen BECKER, Ludwig BUSAM, Bruno Johannes EHRNSPERGER, Torsten LINDNER, Siegfried LINK, Volker MAIER, Sanaul Kabir SIDDIQUEE, Gabriele STIEHL, Thomas TOMBUELT
  • Patent number: 9006315
    Abstract: The present invention relates to improvements in prevention of discoloration of thermoplastic starch materials and their blends with other thermoplastic materials.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: April 14, 2015
    Assignee: The Procter & Gamble Co
    Inventors: Norman Scott Broyles, Pier-Lorenzo Caruso, Emily Charlotte Boswell, Robert Earl Magness, Ludwig Busam, Jorg Harren, Laurent Wattebled
  • Publication number: 20140275356
    Abstract: The present invention relates to improvements in prevention of discoloration of thermoplastic starch materials and their blends with other thermoplastic materials.
    Type: Application
    Filed: June 2, 2014
    Publication date: September 18, 2014
    Applicant: The Procter & Gamble Company
    Inventors: Norman Scott BROYLES, Pier-Lorenzo CARUSO, Emily Charlotte BOSWELL, Robert Earl MAGNESS, Ludwig BUSAM, Jorg HARREN, Laurent WATTEBLED
  • Patent number: 8791318
    Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than 50%, preferably of more than 60%, 70%, 80% or 90% according to the Wet Immobilization Test described herein.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: July 29, 2014
    Assignee: The Procter & Gamble Company
    Inventors: Uwe Jurgen Becker, Ludwig Busam, Bruno Johannes Ehrnsperger, Torsten Lindner, Siegfried Link, Volker Maier, Sanaul Kabir Siddiquee, Gabriele Stiehl, Thomas Tombuelt