Patents by Inventor Yves De Grandpré

Yves De Grandpré 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).

  • Patent number: 6298859
    Abstract: A process for preparing tobacco, which process comprises the steps of treating a tobacco material with a phenol oxidising enzyme, such as by extracting tobacco with a solvent to provide an extract and a residue; and treating the extract with a phenol oxidising enzyme such as a laccase. An improved tobacco product having a reduced amount of phenolic compounds. This is an alternative or a supplement to a process in which the phenolic compounds are adsorbed onto the insoluble carrier polyvinylpolypyrrolidone (PVPP). In preferred embodiments, the process includes further steps of removing the oxidised phenolic compound, adding adsorbents such as bentonite; removing and/or inactivating the enzyme; and concentrating the extract. Preferred phenol oxidising enzymes are peroxidases and laccases. The thus treated extract is advantageously re-combined with the tobacco residue and further processed to provide a tobacco article for smoking.
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: October 9, 2001
    Assignee: Novozymes A/S
    Inventors: Jesper Vallentin Kierulff, Ole Bill Jørgensen, Tomas Tage Hansen, Anthony James Knox, Yves De Grandpré