Patents by Inventor Vincenzo Malatesta

Vincenzo Malatesta 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).

  • Photochromatic pyrano-1,3-oxazinonaphthalene derivatives
    Patent number: 7262294
    Abstract: Photochromatic compounds belonging to the groups of chromenes and spiro-pyrans having general formula (I)
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: August 28, 2007
    Assignee: Great Lakes Chemical (Europe) GmbH
    Inventors: William Giroldini, Luciana Crisci, Vincenzo Malatesta
  • Stabilizing mixtures for organic polymers
    Publication number: 20030189192
    Abstract: Stablizing mixtures for organic polymers comprising: (a) at least one compound belonging to the group of 3-pyrazolidinones; (b) at least one compound belonging to the group of organic phosphites or phosphonites; (c) at least one compound belonging to the group of sterically hindered phenols; and, optionally, (d) at least one compound belonging to the group of sterically hindered amines. The above mixtures can be used as stabilizers of organic polymers to degradation caused by oxygen, heat and/or light.
    Type: Application
    Filed: February 4, 2003
    Publication date: October 9, 2003
    Inventors: Daniele Girelli, Fabjo Broussard, Vincenzo Malatesta
  • Photochromatic pyrano-1,3-oxazinonaphthalene derivatives
    Publication number: 20030164482
    Abstract: Photochromatic compounds belonging to the groups of chromenes and spiro-pyrans having general formula (I).
    Type: Application
    Filed: February 27, 2003
    Publication date: September 4, 2003
    Inventors: William Giroldini, Luciana Crisci, Vincenzo Malatesta
  • Stabilizing mixtures for organic polymers comprising a pyrazolone, an organic phosphite or phosphonite and a hindered phenol
    Patent number: 6605658
    Abstract: Stabilizing mixtures for organic polymers comprising: a) at least one compound belonging to the group of pyrazolones; b) at least one compound belonging to the group of organic phosphites or phosphonites; c) at least one compound belonging to the group of sterically hindered phenols; and d) at least one compound belonging to the group of sterically hindered amines. The above mixtures are useful in the stabilization to degradation caused by oxygen, heat and/or light, of organic polymers.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: August 12, 2003
    Assignee: Great Lakes Chemical (Europe) GmbH
    Inventors: Fabio Broussard, Daniele Girelli, Maria Lucia Wis, Carlo Neri, Vincenzo Malatesta
  • Photochromatic compounds, process for their preparation and their use in polymeric materials
    Patent number: 6414057
    Abstract: Photochromic compounds belonging to the group of spiro-isoindolino-oxazines having general formula (I). The above photochromatic compounds having general formula (I) have excellent photochromic characteristics, excellent stress resistance and high dyability characteristics.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: July 2, 2002
    Assignee: Great Lakes Chemical (Europe) GmbH
    Inventors: Luciana Crisci, William Giroldini, Vincenzo Malatesta, Maria Lucia Wis
  • Photochromatic compounds in the sold state, process for their preparation and their use in polymeric materials
    Publication number: 20020006589
    Abstract: Photochromatic compounds in the solid state belonging to the group of chromenes and spiro-pyrans, having general formula (I): 1
    Type: Application
    Filed: March 6, 2001
    Publication date: January 17, 2002
    Inventors: Vincenzo Malatesta, Jonathan Hobley, William Giroldini, Maria Lucia Wis
  • Spiro-pyranic compounds endowed with photochromic characteristics
    Patent number: 5688846
    Abstract: Polymeric compositions comprising a polymer and photochromic compounds belonging to the class of spiro-pyrans, having the general formula (I): ##STR1##
    Type: Grant
    Filed: May 15, 1996
    Date of Patent: November 18, 1997
    Assignee: Ministero Dell `Universita` E Della Ricerca Scientifica E Tecnologica
    Inventors: Pietro Allegrini, Nereo Nodari, Vincenzo Malatesta, Luciana Crisci
  • Photochromic products and method for their preparation
    Patent number: 5543533
    Abstract: Photochromic products belonging to the group of chromenes having general formula (I): ##STR1##
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: August 6, 1996
    Assignee: Great Lakes Chemical Italia S.r.l.
    Inventors: Pietro Allegrini, Nereo Nodari, Luciana Crisci, Vincenzo Malatesta
  • Spiro-pyranic compounds endowed with photochromic characteristics
    Patent number: 5532361
    Abstract: Photochromic compounds belonging to the class of spiro-pyrans, having the general formula (I): ##STR1##
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: July 2, 1996
    Assignee: Ministero Dell `Universita` E Della Ricerca Scientifica E Technologica
    Inventors: Pietro Allegrini, Nereo Nodari, Vincenzo Malatesta, Luciana Crisci
  • Stabilizing mixture for compounds having a photochromatic activity
    Patent number: 5242624
    Abstract: Stabilizing mixture for photochromatic substances containing a cyclic amine chosen from 1,4-diazabicyclo-(2.2.2)octane and quinuclidine, or their derivatives, and at least one sterically hindered amine.
    Type: Grant
    Filed: September 16, 1991
    Date of Patent: September 7, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Vincenzo Malatesta, Pietro Allegrini, Luciana Crisci
  • Process of photoetching of superficial coatings based on polymeric materials
    Patent number: 4826755
    Abstract: Process of photoetching of superficial coatings based on polymeric material comprising the irradiation of the coated surface with localized excimer laser beams having wavelengths equal to or lower than 193 nm.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: May 2, 1989
    Assignee: Montedison S.p.A.
    Inventors: Fabio Garbassi, Ernesto Occhiello, Vincenzo Malatesta
  • Production of carbonyl fluoride
    Patent number: 4447304
    Abstract: A method of producing carbonyl fluoride by multiphoton decomposition of carbon dioxide-sulphur hexafluoride mixtures comprising irradiating gaseous carbon dioxide-sulphur hexafluoride mixtures in a reaction chamber at a pressure in the 10-50 Torr range with a laser beam at a frequency of about 944 wavenumbers and passing the material from the reaction chamber after irradiation through a chemical processing stage to obtain a carbonyl fluoride product.
    Type: Grant
    Filed: February 22, 1982
    Date of Patent: May 8, 1984
    Assignee: Canadian Patents & Development Limited
    Inventors: Vincenzo Malatesta, Clive Willis, Peter A. Hackett
  • Method of production of vitamin-D
    Patent number: 4388242
    Abstract: A method of upgrading a product containing a minor proportion of pre-vitamin d.sub.2 or pre-vitamin d.sub.3 and a major proportion of tachysterol comprising irradiating the product with laser light in the wavelength range 330-360 nanometers to obtain a product containing approximately 95% pre-vitamin -D.sub.2 or pre-vitamin -D.sub.3, and heating this product to convert the pre-vitamin -D.sub.2 or pre-vitamin -D.sub.3 to vitamin -D.sub.2 or vitamin -D.sub.3.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: June 14, 1983
    Assignee: Canadian Patents & Development Limited
    Inventors: Vincenzo Malatesta, Clive Willis, Peter A. Hackett