Patents by Inventor Kai-Volker Schubert

Kai-Volker Schubert 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).

  • Washable leather with repellency
    Publication number: 20080196168
    Abstract: A washable leather having durable oil repellency, durable stain release, and durable water repellency is disclosed and a method of its preparation comprising contacting the leather during tanning with a composition which comprises at least one fluorinated urethane; at least one fluorinated ester; a mixture thereof; or a mixture of at least one fluorinated citrate urethane with at least one fluorinated urethane, at least one fluorinated ester, or a mixture of fluorinated urethane and fluorinated ester.
    Type: Application
    Filed: March 3, 2008
    Publication date: August 21, 2008
    Applicant: E.I. du Pont de Nemours and Company
    Inventors: Kai Volker Schubert, Andrew Hen Liu, Hansjoerg Scheen
  • Leather treated with fluorochemicals
    Patent number: 7160480
    Abstract: A method of treating leather for imparting soil resistance to the leather by contacting the leather with a fluorinated hydrophobic additive comprising at least one fluorinated urethane or a mixture of at least one fluorinated urethane with at least one fluorinated ester, and the resulting treated leather having soil resistance are disclosed.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: January 9, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Andrew Hen Liu, Kai-Volker Schubert
  • Washable leather with repellency
    Publication number: 20060188729
    Abstract: A washable leather having durable oil repellency, durable stain release, and durable water repellency is disclosed and a method of its preparation comprising contacting the leather during tanning with a composition which comprises at least one fluorinated urethane; at least one fluorinated ester; a mixture thereof; or a mixture of at least one fluorinated citrate urethane with at least one fluorinated urethane, at least one fluorinated ester, or a mixture of fluorinated urethane and fluorinated ester.
    Type: Application
    Filed: February 22, 2005
    Publication date: August 24, 2006
    Inventors: Kai-Volker Schubert, Andrew Liu, Hansjoerg Scheen
  • Leather treated with fluorochemicals
    Publication number: 20060186368
    Abstract: A method of treating leather for imparting soil resistance to the leather by contacting the leather with a fluorinated hydrophobic additive comprising at least one fluorinated urethane or a mixture of at least one fluorinated urethane with at least one fluorinated ester, and the resulting treated leather having soil resistance are disclosed.
    Type: Application
    Filed: February 22, 2005
    Publication date: August 24, 2006
    Inventors: Andrew Liu, Kai-Volker Schubert
  • Refrigerant compositions containing a compatibilizer
    Publication number: 20040222402
    Abstract: The present invention provides compositions that are useful for compatabilizing a conventional, non-polar, compression refrigeration lubricant and a hydrofluorocarbon and/or hydrochlorofluorocarbon refrigerant in a compression refrigeration apparatus. Additionally, these composition promote efficeint return of lubricant from the non-compressor zones to the compressor zones of the aforesaid refrigeration apparatus.
    Type: Application
    Filed: June 14, 2004
    Publication date: November 11, 2004
    Inventors: Barbara Haviland Minor, Keith Winfield Palmer, Walter Mahler, Thomas Joseph Leck, Kai-Volker Schubert, Donald Bernard Bivens
  • Spandex and it's preparation with dispersant slurry
    Patent number: 6716523
    Abstract: A dispersant slurry for making spandex, based on phosphated block poly(alkylsiloxane)-poly(alkyleneether) alcohol or aromatic- or alkylaromatic-terminated phosphated poly(alkyleneether) alcohol dispersants, is provided.
    Type: Grant
    Filed: January 6, 2003
    Date of Patent: April 6, 2004
    Assignee: E. I. du Pont de Nemours and Co.
    Inventors: Thomas Edward Carney, Oliver Gutsche, Kai-Volker Schubert
  • Dispersant slurries for making spandex
    Publication number: 20030149116
    Abstract: A dispersant slurry for making spandex, based on phosphated block poly(alkylsiloxane)-poly(alkyleneether) alcohol or aromatic- or alkylaromatic-terminated phosphated poly(alkyleneether) alcohol dispersants, is provided.
    Type: Application
    Filed: January 6, 2003
    Publication date: August 7, 2003
    Inventors: Thomas Edward Carney, Oliver Gutsche, Kai-Volker Schubert
  • Dispersant slurries for making spandex
    Patent number: 6531514
    Abstract: A dispersant slurry for making spandex, based on phosphated block poly(alkylsiloxane)-poly(alkyleneether) alcohol or aromatic- or alkylaromatic-terminated phosphated poly(alkyleneether) alcohol dispersants, is provided.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: March 11, 2003
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Thomas Edward Carney, Oliver Gutsche, Kai-Volker Schubert
  • Refrigerant compositions containing a compatibilizer
    Publication number: 20030034477
    Abstract: The present invention provides compositions that are useful for compatabilizing a conventional, non-polar, compression refrigeration lubricant and a hydrofluorocarbon and/or hydrochlorofluorocarbon refrigerant in a compression refrigeration apparatus. Additionally, these composition promote efficeint return of lubricant from the non-compressor zones to the compressor zones of the aforesaid refrigeration apparatus.
    Type: Application
    Filed: December 6, 2001
    Publication date: February 20, 2003
    Inventors: Barbara Haviland Minor, Keith Winfield Palmer, Walter Mahler, Thomas Joseph Leck, Kai-Volker Schubert, Donald Bernard Bivens
  • Reduction of surface tension
    Patent number: 6506806
    Abstract: A composition for reducing surface tension comprising from about 0.1% to about 0.5% by weight of a hydrocarbon surfactant and from 0.0001% to about 0.3% by weight of a fluorocarbon surfactant, provided that the hydrocarbon surfactant is present at less than or equal to 0.08% by weight when the fluorocarbon surfactant is present at greater than or equal to 0.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: January 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Charles Kenneth Taylor, Kai Volker Schubert, Richard David Koehler
  • Reduction of surface tension
    Publication number: 20020014611
    Abstract: A composition for reducing surface tension comprising from about 0.1% to about 0.5% by weight of a hydrocarbon surfactant and from 0.0001% to about 0.3% by weight of a fluorocarbon surfactant, provided that the hydrocarbon surfactant is present at less than or equal to 0.08% by weight when the fluorocarbon surfactant is present at greater than or equal to 0.
    Type: Application
    Filed: May 15, 2001
    Publication date: February 7, 2002
    Inventors: Charles Kenneth Taylor, Kai Volker Schubert, Richard David Koehler
  • Dispersant slurries for making spandex
    Publication number: 20010031791
    Abstract: A dispersant slurry for making spandex, based on phosphated block poly(alkylsiloxane)-poly(alkyleneether) alcohol or aromatic- or alkylaromatic-terminated phosphated poly(alkyleneether) alcohol dispersants, is provided.
    Type: Application
    Filed: March 7, 2001
    Publication date: October 18, 2001
    Inventors: Thomas E. Carney, Oliver Gutsche, Kai-Volker Schubert