Patents by Inventor William Giroldini

William Giroldini 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
  • 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
  • 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
  • Poly(pentaerythrityl diphosphonate) and its use in self-extinguishing thermoplastic compositions
    Patent number: 5597855
    Abstract: Poly(Pentaerythrityl diphosphonate) of formula (I): ##STR1## wherein n is an integer having a value comprised within the range of from 3 to 100.The poly(pentaerythrityl diphosphonate) of formula (I) is useful as a flame retardant additive for thermoplastic polymers.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: January 28, 1997
    Assignee: Eniricerche S.p.A.
    Inventors: William Giroldini, Antonio Rinaldi, Gianluigi Landoni, Neri Carlo
  • New pentaerythryl phosphonates containing self-extinguishing thermoplastic compositions
    Patent number: 5338787
    Abstract: A new group of pentaerythryl diphosphonates and poly(pentaerythryl diphosphonates) are described. Flame-retardant compositions are also described, which include a thermoplastic polymer and a certain amount of self-extinguishing agent consisting of one of the above-mentioned pentaerythryl diphosphonates or poly(pentaerythryl diphosphonates).
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: August 16, 1994
    Assignee: Enichem Synthesis, S.p.A.
    Inventors: William Giroldini, Gianluigi Landoni, Antonio Rinaldi, Carlo Neri
  • Pentaerythryl phosphonates and their use in self-extinguishing thermoplastic polymeric compositions
    Patent number: 5288869
    Abstract: A new group of pentaerythryl diphosphonates and poly(pentaerythryl diphosphonates) are described. Flame-retardant compositions are also described, which include a thermoplastic polymer and a certain amount of self-extinguishing agent consisting of one of the above-mentioned pentaerythryl diphosphonates or poly(pentaerythryl diphosphonates).
    Type: Grant
    Filed: August 6, 1992
    Date of Patent: February 22, 1994
    Assignee: Enichem Synthesis S.p.A.
    Inventors: William Giroldini, Gianluigi Landoni, Antonio Rinaldi, Carlo Neri
  • Photochromatic compound, a method for its preparation, and articles which contain it
    Patent number: 5225563
    Abstract: A photochromatic compound represented by the following general formula (I): ##STR1## where: R.sub.1 and R.sub.2 independently represent a linear, branched or cyclic C1-C10 alkyl radical, H, OH, F, Cl, Br, NH.sub.2, N(R.sub.4).sub.2, COOH, OR.sub.4 or COOR.sub.4 where R.sub.4 is a C1-C10 linear, branched or cyclic alkyl radical, or an aryl radical;R.sub.3 is a variously substituted mono or polycondensed heterocyclic or aryl radical.A compound (I) demonstrates marked photochromatic characteristics both when in an organic solvent solution and when incorporated into polymer matrices.
    Type: Grant
    Filed: December 18, 1990
    Date of Patent: July 6, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Carlo Neri, William Giroldini, Antonio Rinaldi, Luciana Crisci
  • Process for preparing aryl- or heteroarylhexadienoic acids
    Patent number: 4355168
    Abstract: There is disclosed and claimed a process for preparing aryl- and heteroarylhexadienoic acids which is characterized in that an aryl- or heteroarylacetylene having the formula: R--C.tbd.CH, wherein R is an aryl or heteroaryl group, optionally substituted and having in the aggregate up to 20 carbon atoms, is reacted with 3-butenoic acid CH.sub.2 .dbd.CH--CH.sub.2 --COOH, in an alcoholic medium, at temperatures maintained between 50.degree. C. and 120.degree. C., approximately, in the presence of a catalyst selected from among the phosphinic complexes of rhodium having the formulas: III, Rh(PR'.sub.3).sub.n L.sub.m X associated with alkaline salts of carboxylic acids having up to 4 carbon atoms, and IV, Rh(PR'.sub.3).sub.n L.sub.p.sup.+ Y.sup.
    Type: Grant
    Filed: December 2, 1980
    Date of Patent: October 19, 1982
    Assignee: Montedison S.p.A.
    Inventors: Gian P. Chiusoli, William Giroldini, Luciano Pallini, Giuseppe Salerno
  • Process for preparing dienoic acids
    Patent number: 4309357
    Abstract: Dienoic acids are prepared by reaction of salts of 3-butenoic acid and vinyl halides, in the presence of catalysts which are phosphinic complexes of rhodium or nickel.
    Type: Grant
    Filed: March 7, 1980
    Date of Patent: January 5, 1982
    Assignee: Montedison S.p.A.
    Inventors: Gian P. Chiusoli, William Giroldini, Giuseppe Salerno