Patents by Inventor Francesco De Feo

Francesco De Feo 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).

  • Substituted arylamine intermediates for dyes
    Patent number: 4335246
    Abstract: Substituted arylamine dye intermediates and their preparation are disclosed.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: June 15, 1982
    Assignee: Aziende Colori Nazionali Affini ACNA S.p.A.
    Inventors: Francesco De Feo, Giovanni Burei, Roberto Cipolli
  • Salts of basic dyes, preparation and uses of same
    Patent number: 4306875
    Abstract: This invention relates to novel dye salts of basic dyes or basic optical brighteners and anionic esters of boric acid. The invention also includes the preparation of the aforementioned novel dye salts.
    Type: Grant
    Filed: August 5, 1980
    Date of Patent: December 22, 1981
    Assignee: Aziende Colori Nazionali Affini ACNA S.p.A.
    Inventors: Francesco De Feo, Adelio Basilico
  • 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
  • Organic solvent-soluble azo dyes
    Patent number: 4011209
    Abstract: Azo dyes which are highly soluble in organic solvents are disclosed. The dyes have the general formula ##STR1## in which M = 1 TO 3;n = 1 or 2;X = h or NO.sub.2 ;Y = h, cl, NO.sub.2, lower alkyl or lower alkoxy radicals containing from 1 to 3 carbon atoms;Z and Z' = H, Cl, lower alkyl or alkoxy radicals containing 1 to 3 carbon atoms, or lower acylamine groups;R' = alkyl or ##STR2## R" = H, or a lower alkyl radical containing 1 to 3 carbon atoms; R'" = an alkyl radical containing from 1 to 18 carbon atoms, or a cycloalkyl radical.The aromatic nuclei A, B, and C may have other water-insoluble substituents.Organic solvent solutions of the azo dyes are provided, as are, also, processes for obtaining the dyes.
    Type: Grant
    Filed: March 5, 1973
    Date of Patent: March 8, 1977
    Assignee: Aziende Colori Nazionali Affini ACNA S.p.A.
    Inventors: Francesco De Feo, Sisto Papa, Enrico Traverso
  • 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