Patents by Inventor Leonardus Antonius Godfried Busscher

Leonardus Antonius Godfried Busscher 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).

  • Process for spinning multifilament yarn
    Patent number: 10889917
    Abstract: A spinneret is used to reduce filament breakage during spinning of multifilament yarn being stretched at a high stretch ratio. The spinneret has a first group of spinning holes with capillaries and a second group of spinning holes with capillaries. The capillaries of the second group of spinning holes have a lower length to diameter (L/D) ratio than the capillaries of the first group of spinning holes. All of the capillaries have the same diameter, which is 100 ?m or less.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: January 12, 2021
    Assignee: TEIJIN ARAMID B.V.
    Inventors: Leonardus Antonius Godfried Busscher, Michiel Jan Adriaan Jaarsveld
  • PROCESS FOR SPINNING MULTIFILAMENT YARN
    Publication number: 20140290205
    Abstract: A spinneret is used to reduce filament breakage during spinning of multifilament yarn being stretched at a high stretch ratio. The spinneret has a first group of spinning holes with capillaries and a second group of spinning holes with capillaries. The capillaries of the second group of spinning holes have a lower length to diameter (L/D) ratio than the capillaries of the first group of spinning holes. All of the capillaries have the same diameter, which is 100 ?m or less.
    Type: Application
    Filed: October 2, 2012
    Publication date: October 2, 2014
    Inventors: Leonardus Antonius Godfried Busscher, Michiel Jan Adriaan Jaarsveld
  • Method for obtaining high-tenacity aramid yarn
    Patent number: 8501071
    Abstract: The invention relates to a method for obtaining high-tenacity aramid yarn, wherein the yarn is made of a copolymer obtained from a mixture of monomers comprising DAPBI, an aromatic para-diamine, and an aromatic para-diacid, wherein the yarn is heated in at least two process steps, characterized in that in a first step the yarn is heated at a temperature of 200 to 360° C. at a tension of at least 0.2 cN/dtex, followed by a second step wherein the yarn is heated at a temperature of 370 to 500° C. at a tension of less than 1 cN/dtex. The invention further pertains to a multifilament aramid yarn spun from a sulfuric acid spin dope and having a tenacity of at least 2500 mN/tex.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: August 6, 2013
    Assignee: Teijin Aramid B.V.
    Inventors: Hanneke Boerstoel, Johannes Bos, Adriaan Anton Schaap, Dennis Wilbers, Leonardus Antonius Godfried Busscher, Antonius Henricus Maria Schotman, Kurt Rainer Hans-Heinrich Stolze
  • Method for obtaining high-tenacity aramid yarn
    Publication number: 20100001433
    Abstract: The invention relates to a method for obtaining high-tenacity aramid yarn, wherein the yarn is made of a copolymer obtained from a mixture of monomers comprising DAPBI, an aromatic para-diamine, and an aromatic para-diacid, wherein the yarn is heated in at least two process steps, characterized in that in a first step the yarn is heated at a temperature of 200 to 360° C. at a tension of at least 0.2 cN/dtex, followed by a second step wherein the yarn is heated at a temperature of 370 to 500° C. at a tension of less than 1 cN/dtex. The invention further pertains to a multifilament aramid yarn spun from a sulfuric acid spin dope and having a tenacity of at least 2500 mN/tex.
    Type: Application
    Filed: November 19, 2007
    Publication date: January 7, 2010
    Applicant: TEIJIN ARAMID B.V.
    Inventors: Hanneke Boerstoel, Johannes Bos, Adriaan Anton Schaap, Dennis Wilbers, Leonardus Antonius Godfried Busscher, Antonius Henricus Maria Schotman, Kurt Rainer Hans-Heinrich Stolze