Patents by Inventor Indrek J. Viira

Indrek J. Viira 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).

  • Production of ethanol
    Patent number: 4522920
    Abstract: A flow of fermenting liquor from a fermentor is separated into a yeast concentrate flow, which is recirculated to the fermentor, and a yeast-free flow which is separated in a simple evaporator unit into a first ethanol-enriched vapor flow and a first liquid bottom flow. The first vapor flow is treated to produce the desired ethanol while a major part of the first liquid bottom flow is recirculated to the fermentor. A minor, residual part of the latter flow is fed to a stripping unit where it is separated into a second ethanol-enriched vapor flow and a second liquid bottom flow exhausted of ethanol.
    Type: Grant
    Filed: August 16, 1982
    Date of Patent: June 11, 1985
    Assignee: Alfa-Laval AB
    Inventors: Conny R. Thorsson, Indrek J. Viira
  • Production of ethanol
    Patent number: 4358536
    Abstract: A flow of fermenting liquor from a fermentor is separated into a yeast concentrate flow, which is recirculated to the fermentor, and a yeast-free flow which is separated in a simple evaporator unit into a first ethanol-enriched vapor flow and a first liquid bottom flow. The first vapor flow is treated to produce the desired ethanol while a major part of the first liquid bottom flow is recirculated to the fermentor. A minor, residual part of the latter flow is fed to a stripping unit where it is separated into a second ethanol-enriched vapor flow and a second liquid bottom flow exhausted of ethanol.
    Type: Grant
    Filed: February 22, 1980
    Date of Patent: November 9, 1982
    Assignee: Alfa-Laval AB
    Inventors: Conny R. Thorsson, Indrek J. Viira