Patents by Inventor Bas Castelijn

Bas Castelijn 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).

  • Method for whitening tobacco
    Patent number: 11937626
    Abstract: A method of preparing a whitened tobacco material is provided, including: (i) extracting a tobacco material with a first extraction solution to provide a tobacco solids material and a tobacco extract; (ii) cooking the tobacco solids material in an alkaline cooking liquid comprising sodium sulfide and having a pH of greater than 11 to form a tobacco pulp; (iii) treating the tobacco pulp with an acid to lower the pH of the tobacco pulp and provide a neutralized tobacco pulp; (iv) extracting the neutralized tobacco pulp with a second extraction solution comprising at least one chelating agent to provide an extracted tobacco pulp; and (v) bleaching the extracted tobacco pulp with a bleaching solution to provide a whitened tobacco material.
    Type: Grant
    Filed: September 4, 2020
    Date of Patent: March 26, 2024
    Assignee: Nicoventures Trading Limited
    Inventors: Bas Castelijn, Lars Olov Sundvall, Richard Svensson, David Neil McClanahan
  • Method for whitening tobacco
    Patent number: 11369131
    Abstract: A method of preparing a whitened tobacco material for use in a smokeless tobacco product is provided, including: (i) extracting a tobacco material with an extraction solution to provide a tobacco solids material and a tobacco extract; (ii) cooking the tobacco solids material in an alkaline sulfite cooking liquor including sulfite ions and having a pH of greater than 7 to form a tobacco pulp; (iii) bleaching the tobacco pulp with a bleaching solution to provide a bleached tobacco material; and (iv) drying the bleached tobacco material to provide the whitened tobacco material.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: June 28, 2022
    Assignee: Nicoventures Trading Limited
    Inventors: Lars Sundvall, Richard Svensson, Bas Castelijn, David Neil McClanahan
  • METHOD FOR WHITENING TOBACCO
    Publication number: 20220071272
    Abstract: A method of preparing a whitened tobacco material is provided, including: (i) extracting a tobacco material with a first extraction solution to provide a tobacco solids material and a tobacco extract; (ii) cooking the tobacco solids material in an alkaline cooking liquid comprising sodium sulfide and having a pH of greater than 11 to form a tobacco pulp; (iii) treating the tobacco pulp with an acid to lower the pH of the tobacco pulp and provide a neutralized tobacco pulp; (iv) extracting the neutralized tobacco pulp with a second extraction solution comprising at least one chelating agent to provide an extracted tobacco pulp; and (v) bleaching the extracted tobacco pulp with a bleaching solution to provide a whitened tobacco material.
    Type: Application
    Filed: September 4, 2020
    Publication date: March 10, 2022
    Inventors: Bas Castelijn, Lars Olov Sundvall, Richard Svensson, David Neil McClanahan
  • METHOD FOR WHITENING TOBACCO
    Publication number: 20210076731
    Abstract: A method of preparing a whitened tobacco material for use in a smokeless tobacco product is provided, including: (i) extracting a tobacco material with an extraction solution to provide a tobacco solids material and a tobacco extract; (ii) cooking the tobacco solids material in an alkaline sulfite cooking liquor including sulfite ions and having a pH of greater than 7 to form a tobacco pulp; (iii) bleaching the tobacco pulp with a bleaching solution to provide a bleached tobacco material; and (iv) drying the bleached tobacco material to provide the whitened tobacco material.
    Type: Application
    Filed: September 13, 2019
    Publication date: March 18, 2021
    Inventors: Lars Sundvall, Richard Svensson, Bas Castelijn, David Neil McClanahan