Patents by Inventor Renzo Ferrario

Renzo Ferrario 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).

  • Process for the manufacture of granular monohydrated sodium perborate
    Patent number: 4942025
    Abstract: Process for the manufacture of granular monohydrated sodium perborate, endowed with abrasion resistance, starting from the corresponding tetrahydrated perborate, characterized in that a carboxylic acid, containing from 1 to 3 C atoms, or an alkali metal salt thereof, is added to the tetrahydrated perborate, already present in the granular state, whereafter a dehydration of the tetrahydrated perborate is carried out.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: July 17, 1990
    Assignee: Ausimont S.p.A.
    Inventors: Antonino Condo, Renzo Ferrario
  • Process for the production of granular sodium perborate monohydrate having good mechanical strength
    Patent number: 4894211
    Abstract: The invention relates to a process for the production of granular sodium perborate monohydrate having good mechanical strength. The process is characterized in that sodium silicate having an SiO.sub.2 /Na.sub.2 O molar ratio comprised within the range of from 0.4 to 2.0 is added to granular sodium perborate tetrahydrate while this is being kept in movement and the so processed perborate tetrahydrate is dried until perborate monohydrate is obtained.
    Type: Grant
    Filed: May 15, 1986
    Date of Patent: January 16, 1990
    Assignee: Ausimont S.p.A.
    Inventors: Antonino Condo', Renzo Ferrario
  • Symmetrical trisazo dye obtained by coupling tetrazotized 4-4'-diaminozobenzene with 2-carboxymethylamin0-8-naphthol-6-sulphonic acid
    Patent number: 4248776
    Abstract: The present invention concerns a new acid trisazo dye suited for the dyeing of natural and synthetic polyamidic fibres and particularly for the dyeing of leather. The dye has the following structural formula: ##STR1## and dyes in a full black shade. The present invention also includes a process for the preparation of dye (I) and comprises tetrazotizing 4-4' diaminoazobenzene and then coupling the tetrazo-compound thus formed with 2 molecules of 2-carboxymethylamino-8-naphtol-6-sulphonic acid (carboxy methyl-gamma acid) in an alkaline medium.
    Type: Grant
    Filed: April 25, 1979
    Date of Patent: February 3, 1981
    Assignee: Aziende Colori Nazionali Affini Acna S.p.A.
    Inventors: Sisto S. Papa, Renzo Ferrario
  • Water-soluble polyazo compound derived from 4-4-diaminobenzanilide
    Patent number: 3983101
    Abstract: Sulphonated azoic dyestuffs of the formula: ##SPC1##Are useful in dyeing cotton, other cellulosic fibers, natural and synthetic polyamide fibers and leather.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: September 28, 1976
    Assignee: Aziende Colori Nazionali Affini ACNA S.p.A.
    Inventors: Sisto Sergio Papa, Antonino Condo, Renzo Ferrario