Patents by Inventor Alain Callet

Alain Callet 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).

  • Purified form of streptogramins, its preparation and pharmaceutical compositions containing it
    Patent number: 5726151
    Abstract: This invention relates to a purified form of streptogramins, having of a combination of one or more group B components of streptogramins, of general formula: ##STR1## in which A.sub.1 is a radical of general formula: ##STR2## for which R' is H or OH and Y is H, a methylamino radical or a dimethylamino radical,R is an ethyl radical or, when R' is H, R can also represent--CH.sub.3, andR.sub.1 and R.sub.2 are H, or alternativelyA.sub.1 is a radical of formula: ##STR3## R is an isobutyl radical, and R.sub.1 is OH and R.sub.2 is --CH.sub.3,and one or more group A minority components of streptogramins, of general formula: ##STR4## in which R" is H or a methyl or ethyl radical, in the state of cocrystallizate, of a coprecipitate or of a physical mixture of the powders.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 10, 1998
    Assignee: Rhone-Poulenc Rorer S.A.
    Inventors: Pascal Anger, Bertrand Bonnavaud, Alain Callet, Patrick Lefevre
  • Purified form of streptogramins, its preparation and pharmaceutical compositions containing it
    Patent number: 5637565
    Abstract: This invention relates to a purified form of streptogramins, consisting of a combination of one or more group B components of streptogramins, of general formula: ##STR1## in which A.sub.1 is a radical of general formula: ##STR2## for which R' is H or OH and Y is H, a methylamino radical or a dimethylamino radical, R is an ethyl radical or, when R' is H, R can also represent --CH.sub.3, and R.sub.1 and R.sub.2 are H, or alternatively A.sub.1 is a radical of formula: ##STR3## R is an isobutyl radical, and R.sub.1 is OH and R.sub.2 is --CH.sub.3, and one or more group A minority components of streptogramins, of general formula: ##STR4## in which R" is H or a methyl or ethyl radical, in the state of cocrystallizate, of a coprecipitate or of a physical mixture of the powders.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 10, 1997
    Assignee: Rhone-Poulenc Rorer S.A.
    Inventors: Pascal Anger, Bertrand Bonnavaud, Alain Callet, Patrick Lefevre