Patents by Inventor Werner Schweers

Werner Schweers 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 production of xylitol from lignocellulosic raw materials
    Patent number: 4742814
    Abstract: A process for the production of sugars, and optionally cellulose and lignin, from lignocellulosic vegetable materials which comprises subjecting the vegetable materials to a chemical pretreatment with a mixture of water and lower aliphatic alcohols and/or ketones at a temperature from 100.degree. to 190.degree. C. for a period of from 4 hours to 2 minutes with control of the breakdown of the hemicellulose components followed by separation of residue and a subsequent main chemical treatment with a similar solvent mixture at elevated temperatures for a further period of from 6 hours to 2 minutes.
    Type: Grant
    Filed: January 30, 1987
    Date of Patent: May 10, 1988
    Assignee: Bau- und Forschungsgesellschaft Thermoform AG
    Inventors: Michael Sinner, Hans-Hermann Dietrichs, Jurgen Puls, Werner Schweers, Karl-Heinz Brachthauser
  • Process for production of sugars and optionally cellulose and lignin from lignocellulosic raw materials
    Patent number: 4520105
    Abstract: A process for the production of sugars, and optionally cellulose and lignin, from lignocellulosic vegetable materials which comprises subjecting the vegetable materials to a chemical pretreatment with a mixture of water and lower aliphatic alcohols and/or ketones at a temperature from 100.degree. to 190.degree. C. for a period of from 4 hours to 2 minutes with control of the breakdown of the hemicellulose components followed by separation of residue and a subsequent main chemical treatment with a similar solvent mixture at elevated temperatures for a further period of from 6 hours to 2 minutes.
    Type: Grant
    Filed: August 10, 1983
    Date of Patent: May 28, 1985
    Assignee: Bau- und Forschungsgesellschaft Thermoform AG
    Inventors: Michael Sinner, Hans-Hermann Dietrichs, Jurgen Puls, Werner Schweers, Karl-Heinz Brachthauser