Patents by Inventor Ekkehard van Leemputten

Ekkehard van Leemputten 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 producing an enzyme product having variable solubility
    Patent number: 4017364
    Abstract: An enzymatically active product is prepared by reacting an enzyme, e.g. trypsin, with a polymer carrying both free aldehyde groups and free acid groups, e.g. a copolymer of acroelin and acrylic acid containing at least 10 % of free aldehyde groups based on the total of free aldehyde and acid groups. The product has a variable solubility in aqueous medium so that the enzyme bound to the polymer can be recovered for reuse by adjusting the pH to precipitate the polymer.
    Type: Grant
    Filed: June 19, 1975
    Date of Patent: April 12, 1977
    Assignee: Societe d'Assistance Technique pour Produits Nestle S.A.
    Inventor: Ekkehard van Leemputten