Patents by Inventor Pierre Meilland

Pierre Meilland 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).

  • Intermediates for use in the preparation of vitamin E
    Patent number: 6867307
    Abstract: Intermediate compounds which can be used in the preparation of phytone and Vitamin E, a process for the preparation thereof, and a process for the preparation of phytone and Vitamin E from these intermediate compounds.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: March 15, 2005
    Assignee: Adisseo France S.A.S.
    Inventors: Jean-Erick Ancel, Pierre Meilland
  • Intermediates for use in the preparation of vitamin e
    Publication number: 20030166950
    Abstract: Novel intermediate compounds which can be used in the preparation of phytone and Vitamin E and a process for the preparation thereof. A process for the preparation of phytone and Vitamin E from these compounds is also claimed.
    Type: Application
    Filed: March 18, 2003
    Publication date: September 4, 2003
    Inventors: Jean-Erick Ancel, Pierre Meilland
  • Method for preparing vitamin A
    Patent number: 6384270
    Abstract: The invention relates to a process for making vitamin A from ethynyl-retro-&agr;-ionol using an allene acetate as intermediate.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: May 7, 2002
    Assignee: Aventis Animal Nutrition, S.A.
    Inventors: Jean-Erick Ancel, Pierre Meilland
  • Process for the preparation of substituted phenols
    Patent number: 5744617
    Abstract: A process for the preparation of substituted phenols, in particular, the condensation of phenols having one or more alkyl substituents with a butadiene derivative comprising at least six carbon atoms, in particular myrcene and/or .beta.-springene is disclosed. The cyclization, in the form of chromans, of the products obtained during this condensation and their hydrogenation in order to prepare vitamin E is also disclosed.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: April 28, 1998
    Assignee: Rhone-Poulenc Nutrition Animale
    Inventors: Jean-Erick Ancel, Hugues Bienayme, Pierre Meilland
  • Intermediates for the preparation of vitamin A and carotenoids and process for their preparation
    Patent number: 5663459
    Abstract: The present invention relates to novel intermediates for the preparation of vitamin A and carotenoids corresponding to the formula (II): ##STR1## in which A represents a hydrogen or an alkyl, alkenyl or alkoxy group containing 1 to 4 carbon atoms, and X represents a carbon atom, and to a process for their preparation and their use, and further relates to compounds for preparing intermediates of formula (II) corresponding to the formula (III): ##STR2## in which R represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkylcarbonyl, alkenylcarbonyl, alkoxyalkyl or alkoxyalkenyl group in which the alkyl groups have 1 to 10 carbon atoms and the alkenyl groups have 2 to 10 carbon atoms, each of said groups being linear or branched and each being substituted or unsubstituted.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 2, 1997
    Assignee: Rhone-Poulenc Nutrition Animale
    Inventors: Hugues Bienayme, Pierre Meilland
  • Intermediates for the preparation of vitamin A and carotenoids and process for their preparation
    Patent number: 5567852
    Abstract: The present invention relates to novel intermediates for the preparation of vitamin A and carotenoids corresponding to the formula (II): ##STR1## in which A represents a hydrogen or an alkyl, alkenyl or alkoxy group containing 1 to 4 carbon atoms, and X represents a carbon atom, and to a process for their preparation and their use, and further relates to compounds for preparing intermediates of formula (II) corresponding to the formula (III): ##STR2## in which R represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkylcarbonyl, alkenylcarbonyl, alkoxyalkyl or alkoxyalkenyl group in which the alkyl groups have 1 to 10 carbon atoms and the alkenyl groups have 2 to 10 carbon atoms, each of said groups being linear or branched and each being substituted or unsubstituted.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: October 22, 1996
    Assignee: Rhone-Poulenc Nutrition Animale
    Inventors: Hugues Bienayme, Pierre Meilland