Patents by Inventor Ernesto Riva

Ernesto Riva 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).

  • Purification of dalbaheptide antibiotics by isoelectric focusing
    Patent number: 5939523
    Abstract: Method for purifying antibiotic compounds of the dalbaheptide family by means of isoelectric focusing (IEF) in a multicompartinent electrolyzer with immobiline membranes, in particular zwitterionic membranes. A further object of the invention are pure antibiotic compounds obtainable according to the present process, in particular the pure 6.sup.B -decarboxy-6.sup.B -(hydroxymethyl)-N.sup.63 -3-(dimethylamino) propyl amide derivatives of antibiotic A40926.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: August 17, 1999
    Assignee: Gruppo Lepetit SpA
    Inventors: Alessandra Maria Bossi, Pier Giorgio Righetti, Ernesto Riva, Luigi Franco Zerilli
  • Antibiotic GE1655 complex and its factors A, B, and C
    Patent number: 5674490
    Abstract: The present invention is directed to a new antibiotic denominated antibiotic GE1655 complex, its factors antibiotic GE1655 factor A, antibiotic GE1655 factor B, and antibiotic GE1655 factor C, the pharmaceutical acceptable salts thereof, the pharmaceutical compositions thereof, and their use as medicaments against bacteria and fungi, particularly for the treatment of fungal infections in animals and human beings.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: October 7, 1997
    Assignee: Gruppa Lepetit S.p.A.
    Inventors: Franco Maria Spreafico, Ernesto Riva, Graziella Beretta, Khalid Islam, Maurizio Denaro
  • Nocardia sp. ATCC 53492, or an antibiotic A 42867 producing mutant or variant thereof
    Patent number: 4956293
    Abstract: A novel antibiotic, A 42867, is prepared by cultivating the strain Nocardia sp. ATCC 53492, or an antibiotic A 42867-producing mutant or variant thereof, under submerged aerobic conditions in the presence of assimilable sources of carbon, nitrogen and inorganic salts. The antibiotic and its addition salts are useful in the treatment of infectious diseases and as growth promotant agents.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: September 11, 1990
    Assignee: Gruppo Lepetit S.p.A.
    Inventors: Ernesto Riva, Maurizio Denaro, Enrico Selva, Giovanni Cassani, Francesco Parenti
  • Antibiotic a 42867 derivative
    Patent number: 4908351
    Abstract: The present invention is directed to a new antibiotic substance denominated antibiotic A 42867 pseudoaglycon, a pharmaceutically acceptable salt thereof, a process for its preparation from antibiotic A 42867 and pharmaceutical compositions containing the new substance of the invention.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: March 13, 1990
    Assignee: Merrell Dow Pharmaceuticals Inc.
    Inventors: Ernesto Riva, Maurizio Denaro, Pietro Ferrari, Giovanni Cassani
  • Antibiotic A 40926 N-acylaminoglucuronyl aglycons and antiobiotic A 40926 aglycon
    Patent number: 4868171
    Abstract: The present invention concerns new antibiotic substances denominated antibiotic A 40926 N-acylaminoglucuronyl aglycon complex AB, antibiotic A 40926 N-acylaminoglucuronyl aglycon factor A, antibiotic A 40926 N-acylaminoglucuronyl aglycon factor B, antibiotic A 40926 N-acylaminoglucuronyl aglycon factor B.sub.0, antibiotic A 40926 N-acylaminoglucuronyl aglycon factor B.sub.1, antibiotic A 40926 aglycon and the addition salts thereof, a process for their preparation starting from antibiotic A 40926 complex or a factor thereof, and their use in the treatment of infectious diseases involving microorganisms susceptible to them.
    Type: Grant
    Filed: December 23, 1986
    Date of Patent: September 19, 1989
    Assignee: Gruppo Lepetit S.p.A.
    Inventors: Enrico Selva, Ernesto Riva, Giovanni Cassani, Francesco Parenti
  • Antibiotic A 42867 and the addition salts thereof
    Patent number: 4804534
    Abstract: A novel antibiotic, A 42867, is prepared by cultivating the strain Nocardia sp. ATCC 53492, or an antibiotic A 42867-producing mutant or variant thereof, under submerged aerobic conditions in the presence of assimilable sources of carbon, nitrogen and inorganic salts. The antibiotic and its addition salts are useful in the treatment of infectious diseases and as growth promotant agents.
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: February 14, 1989
    Assignee: Gruppo Lepetit S.p.A.
    Inventors: Ernesto Riva, Enrico Selva, Maurizio Denaro, Giovanni Cassani, Francesco Parenti