Patents by Inventor Jacques Leclerca

Jacques Leclerca 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).

  • Amino-spiro[oxa(or thia)cycloalkane-penam]-carboxylic
    Patent number: 4137236
    Abstract: Amino-spiro[oxa(or thia)cycloalkane-penam]-carboxylic acid, a salt or an ester thereof, of the formula ##STR1## wherein Z is a hydrogen or an alkali metal atom, or a group protecting the carboxylic function, X is a sulfur or oxygen atom, n is 1 or 2, m is 1 or 2, and process of preparing the same.These compounds are useful as intermediates in the synthesis of a new group of antibiotics having properties similar to penicillins, besides own antibiotic activity with a broad antibacterial spectrum.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: January 30, 1979
    Assignee: U C B, Societe Anonyme
    Inventors: Ludovic Rodriguez, Jacques Leclerca, Pierre Ykman, Eric Cossement