Patents by Inventor David de Rijke

David de Rijke 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).

  • Acetaldehyde ethyl linalyl acetal perfume compositions
    Patent number: 3948814
    Abstract: Odorous acetaldehyde ethyl linalyl acetal, perfume compositions, materials or products comprising conventional constituents such as solvents, diluents and adjuvants and containing as an essential ingredient acetaldehyde ethyl linalyl acetal. Also the method of preparing perfume compositions by adding the acetal thereto and the method of preparing the acetal by reacting a solution of sulfuric acid in linalool to vinylethyl ether, adding soda thereto, separating and fractionating an organic layer with soda.
    Type: Grant
    Filed: August 10, 1972
    Date of Patent: April 6, 1976
    Assignee: Naarden International, N.V.
    Inventor: David de Rijke