Patents by Inventor Karl-Fred De Polo

Karl-Fred De Polo 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 the preparation of p-t-butyl-.alpha.-methyldihydrocinnamaldehyde
    Patent number: 4568772
    Abstract: This invention discloses a novel process for producing p-t-butyl-.alpha.-methyldihydrocinnamaldehyde which comprises converting the .alpha.-methyldihydrocinnamaldehyde to an enamine, oxazolidine or a Schiff's base, reacting said derivative with a tertiary butyl cation, and then removing the protective group.
    Type: Grant
    Filed: September 14, 1983
    Date of Patent: February 4, 1986
    Assignee: Givaudan Corporation
    Inventors: Albert Gabbai, Karl-Fred De Polo
  • 4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane
    Patent number: 4387089
    Abstract: The novel 4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane is useful as a sunscreen agent. It exhibits outstanding UV-A absorbing qualities in that it brings about a considerable retardation in the ageing of the skin with excellent skin tolerance and stability (light, heat and moisture).4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane furthermore improves the protective action of UV B-filters, i.e. of substances which absorb the erythema-producing UV B-radiation in the range of about 290 to 320 mm.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: June 7, 1983
    Assignee: Givaudan Corporation
    Inventor: Karl-Fred De Polo
  • Trimethyl nonene alcohols and perfume compositions
    Patent number: 4006109
    Abstract: Novel odorants of the formula: ##STR1## where one of the R's is a hydrogen atom and the other is a methyl group and R.sup.1 is either the 1- or 2- isobutenyl group.Their use in odorant compositions, method or preparing such alcohols and compositions and novel intermediates for I are also disclosed.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: February 1, 1977
    Assignee: Givaudan Corporation
    Inventors: Paul Albert Ochsner, Karl-Fred De Polo