Patents by Inventor Franco Gonzati

Franco Gonzati 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).

  • O-(3-hydroxy-1-isoquinolinyl)-benzoic acid
    Patent number: 4011227
    Abstract: 7-OXO-7H-dibenzo-[d e,h]-quinolin-2-ol which is useful as an intermediate in the preparation of dyestuffs is prepared by cycloisomerizing the novel compound, N-phenylacetyl phthalimide in an inert solvent and in the presence of a Friedel-Crafts catalyst to form the novel compound O-(3-hydroxy-1-isoquinolinyl)-benzoic acid which is then cyclized by dehydrating condensation to form the 7-oxo-7H-dibenzo-[d e,h]-quinolin-2-ol.
    Type: Grant
    Filed: April 23, 1976
    Date of Patent: March 8, 1977
    Assignee: Aziende Colori Nazionali Affini ACNA S.p.A.
    Inventors: Francesco De Feo, Franco Gonzati, Alberto Osti
  • Process for the preparation of 7-oxo-7H-dibenzo-[d e,h]-quinolin-2-ol
    Patent number: 4011224
    Abstract: 7-OXO-7H-dibenzo-[d e,h]-quinolin-2-ol which is useful as an intermediate in the preparation of dyestuffs is prepared by cycloisomerizing the novel compound, N-phenylacetyl phthalimide in an inert solvent and in the presence of a Friedel-Crafts catalyst to form the novel compound O-(3-hydroxy-1-isoquinolinyl)-benzoic acid which is then cyclized by dehydrating condensation to form the 7-oxo-7H-dibenzo-[d e,h]-quinolin-2-ol.
    Type: Grant
    Filed: December 26, 1974
    Date of Patent: March 8, 1977
    Assignee: Aziende Colori Nazionali Affini ACNA S.p.A.
    Inventors: Francesco De Feo, Franco Gonzati, Alberto Osti
  • Process for preparing 1-aza-2-hydroxybenzanthrone
    Patent number: 3960866
    Abstract: 1-AZA-2-HYDROXYBENZANTHRONE, USEFUL AS AN INTERMEDIATE FOR SYNTHESIZING DYES IS OBTAINED BY THE DIRECT REACTION OF ALKYL ESTERS OF ANTHRAQUINONE-1-ACETIC ACID WITH AMMONIA IN HYDROXYLATED SOLVENTS AND IN THE PRESENCE OF STRONG BASES AND/OR REDUCING SUBSTANCES.
    Type: Grant
    Filed: July 17, 1974
    Date of Patent: June 1, 1976
    Assignees: Montedison S.p.A., Aziende Colori Nazionali Affini ACNA S.p.A.
    Inventors: Giuseppe Ribaldone, Giampiero Borsotti, Franco Gonzati