Patents by Inventor Alfredo Coassolo

Alfredo Coassolo 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).

  • Thermotropic liquid crystal aromatic polysters
    Patent number: 5496912
    Abstract: Thermotropic melt processable liquid crystalline aromatic polyesters comprising units derived from a dicarboxylic acid and from a mixture of aromatic diols in which from 50% to 80% is (1-phenylethyl)hydroquinone and from 20% to 50% is hydroquinone.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: March 5, 1996
    Assignee: Himont Italia S.r.l.
    Inventors: Giuseppe Motroni, Mauro Maritano, Alfredo Coassolo, Giovanni Giunchi
  • Process for the synthesis of aromatic phenyl substituted diols
    Patent number: 5146008
    Abstract: A process for the synthesis of phenyl substituted aromatic diols, obtained by dehydrogenation of the corresponding substituted cyclohexyl derivatives in the presence of a palladium supported catalyst, said palladium supported catalyst being prepared by a process which comprises treating a palladium hydrolysis compound with reducing agents.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: September 8, 1992
    Assignee: Himont italia S.r.l.
    Inventors: Andrea Gardano, Alfredo Coassolo, Francesco Casagrande, Marco Foa, Larry L. Chapoy
  • Thermotropic liquid crystalline polymers
    Patent number: 5017678
    Abstract: Melt-formable thermotropic liquid crystalline polymers containing groups derived from terephthalic acid and a mixture of phenyl hydroquinone, 2-(.alpha.-phenylisopropyl) hydroquinone and, if desired, 2,5 bis (.alpha.-phenylisopropyl) hydroquinone.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: May 21, 1991
    Assignee: Montedison S.p.A.
    Inventors: Umberto Giannini, Alfredo Coassolo, Marco Foa', Giampiero Sabarino, L. Lawrence Chapoy
  • Liquid-crystalline, thermotropic aromatic polyesters
    Patent number: 5013819
    Abstract: Liquid-crystalline, thermotropic, aromatic polyesters processable in the molten state, comprising units derived from hydroquinone mono- and possibly di-substituted with aralkyl groups.
    Type: Grant
    Filed: November 2, 1989
    Date of Patent: May 7, 1991
    Assignee: Montedison S.P.A.
    Inventors: Alfredo Coassolo, Marco Foa', L. Lawrence Chapoy
  • Termotropic liquid-crystalline aromatic polyester from hydroquinone/substituted hydroquinone mixture
    Patent number: 4985533
    Abstract: Thermotropic liquid-crystalline aromatic polyesters processable in the molten state, comprising units derived from at least one dicarboxylic aromatic acid and from mono- and di-substituted (1-phenyl-ethyl)-hydroquinones in admixture with hydroquinone, and/or hydroquinones substituted with halogen or alky, aryl or cycloalkyl groups.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: January 15, 1991
    Assignee: Montedison S.p.A.
    Inventors: Alfredo Coassolo, L. Lawrence Chapoy, Marco Foa, Giampiero Sabarino
  • Thermotropic liquid crystalline aromatic polyester from 3,3'-diphenyl-4,4'- d
    Patent number: 4978735
    Abstract: Thermotropic liquid crystalline aromatic polyesters of 3,3'-diphenyl-4,4'-dihydroxydyphenyl containing units derived from mono-substituted hydroquinones in amounts over 10% by moles with respect to the total of the aromatic diols.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: December 18, 1990
    Assignee: Himont Italia S.r.l.
    Inventors: L. Lawrence Chapoy, Alfredo Coassolo, Marco Foa
  • Thermotropic liquid crystalline polyester from 2,5-dihydroxybenzophenone
    Patent number: 4952661
    Abstract: Thermotropic liquid crystalline polyesters which can be processed in the molten state containing moieties derived from a dicarboxylic aromatic acid and 2,5-dihydroxybenzophenone eventually in a mixture with a substituted hydroquinones.
    Type: Grant
    Filed: December 6, 1989
    Date of Patent: August 28, 1990
    Assignee: Montedison S.p.A.
    Inventors: Marco Foa', Francesco Casagrande, Alfredo Coassolo, L. Lawrence Chapoy
  • Thermotropic liquid-crystalline aromatic polyesters of substituted 4,4'-dihydroxy-diphenylene
    Patent number: 4923955
    Abstract: Thermotropic liquid-crystalline aromatic polyesters of 4,4'-dihydroxy-diphenyl substituted with a halogen or with an alkyl, cycloalkyl, aryl, aralkyl, keto or ether radical.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: May 8, 1990
    Assignee: Montedison S.p.A.
    Inventors: Alfredo Coassolo, Giampiero Sabarino, Marco Foa', L. Lawrence Chapoy
  • Thermotropic liquid crystalline aromatic polyesters of disubstituted 4,4'-dihydroxydiphenylene
    Patent number: 4923947
    Abstract: Thermotropic liquid crystalline aromatic polyesters of 4,4'-dihydroxydiphenyl substituted in 3,3' positions by a halogen or by an alkyl, cycloalkyl or aralkyl radical.
    Type: Grant
    Filed: January 12, 1989
    Date of Patent: May 8, 1990
    Assignee: Montedison S.p.A.
    Inventors: Alfredo Coassolo, Giampiero Sabarino, Marco Foa, Larry L. Chapoy
  • Polyesters of 4,4'dihydroxybicyclohexyl
    Patent number: 4904757
    Abstract: Thermotropic semiflexible polyesters are taught which are obtained by polycondensation of 4,4'-dihydroxybicyclohexyl with at least one .alpha.,.omega.- alkandioic acid of general formula:HOOC-(CH.sub.2).sub.n -COOH (I)wherein n is an integer comprised between 4 and 12.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: February 27, 1990
    Assignee: Montedison S.p.A.
    Inventors: Alfredo Coassolo, Andrea Gardano, Marco Foa', L. Lawrence Chapoy
  • Process for preparing alkyl esters of methyltartronic acid
    Patent number: 4701550
    Abstract: There is described a process for preparing alkyl esters of methyltartronic acid by hydroxylation of methacrylic acid to alpha-methylglyceric acid with H.sub.2 O.sub.2, in an aqueous medium, in the presence of H.sub.2 WO.sub.4 and optionally of H.sub.3 PO.sub.4 or H.sub.3 AsO.sub.4 or alkaline salts thereof as catalysts, at pH<2 and at temperatures of from 50.degree. to 100.degree. C., by subsequent oxidation of alpha-methylglyceric acid to methyltartronic acid with HNO.sub.3 in excess or with O.sub.2, in an aqueous-alkaline medium, in the presence of Pd or Pt carried on carbon or oxides thereof as catalysts, at temperatures of 60.degree.-100.degree. C., and final esterification of methyltartronic acid with alcohols C.sub.1 -C.sub.4.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: October 20, 1987
    Assignee: Istituto Guido Donegani S.p.A.
    Inventors: Carlo Venturello, Enzo Alneri, Alfredo Coassolo, Rino D'Aloisio