Patents by Inventor Giancarlo Cossu
Giancarlo Cossu 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).
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Publication number: 20200391549Abstract: A compound for the preparation of rubber products comprising a cross-linkable unsaturated chain polymer base, a reinforcing filler and a vulcanization system. The vulcanization system comprises at least sulfur, one or more vulcanization accelerants and a vulcanization activator consisting of halogenated graphite.Type: ApplicationFiled: October 24, 2018Publication date: December 17, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Paolo STRAFFI, Giancarlo COSSU, Maria Cecilia PALUMBI, Roberto COMPARELLI
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Publication number: 20200231785Abstract: A silica-based nanomaterial consisting of particles of a Zn salt supported on the surface of silica nanoparticles. The Zn salt is chosen from between Zn3(PO4)2 and Zn2SiO4.Type: ApplicationFiled: October 23, 2018Publication date: July 23, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Giancarlo COSSU, Maria Cecilia PALUMBI, Roberto COMPARELLI, Valerio MARGIOTTA
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Patent number: 10392501Abstract: A rubber mix for tires including at least one cross-linkable polymer base, a reinforcing filler, a vulcanization system, a reinforcing resin and a dithiol chemical according to the formula SHRSH, wherein, in the formula, R is an aliphatic or aromatic group composed of 3 to 12 atoms.Type: GrantFiled: June 11, 2015Date of Patent: August 27, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Giancarlo Cossu, Pasquale Agoretti
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Patent number: 9896568Abstract: A method for preparing a rubber compound comprising at least one first mixing step in which at least part of a cross-linkable polymer base is mixed at least with a reactive reinforcing filler, a dendrimer functionalized with polar groups adapted to interact with the reactive reinforcing filler and a nucleophile agent; and a subsequent mixing step in which the compound being prepared is mixed with a vulcanization system.Type: GrantFiled: June 12, 2015Date of Patent: February 20, 2018Assignee: BRIDGESTONE CORPORATIONInventors: Giancarlo Cossu, Pasquale Agoretti
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Patent number: 9845384Abstract: A rubber compound for tyres comprising a cross-linkable unsaturated chain polymer base comprising, in turn, at least a rubber of synthetic origin, a silica-free filler at least partially comprising carbon black, a vulcanization system and a mercapto carboxylic acid.Type: GrantFiled: December 19, 2014Date of Patent: December 19, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Giancarlo Cossu, Gianluca Forte
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Publication number: 20170313846Abstract: A rubber compound comprising a polymer base with a cross-linkable unsaturated chain, a filler, and a vulcanization system. The vulcanization system comprises at least sulphur, one or more vulcanization accelerators, and one or more vulcanization activators. The vulcanization system comprises a vulcanization activator consisting of Zn2SiO4.Type: ApplicationFiled: November 13, 2015Publication date: November 2, 2017Applicant: BRIDGESTONE CORPORATIONInventors: Giancarlo COSSU, Maria Cecilia PALUMBIA, Ludovica CALIANO
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Publication number: 20170130037Abstract: A rubber compound for tyres comprising at least one cross-linkable polymer base, a reinforcing filler, a vulcanization system, a reinforcing resin and a dithiol chemical with formula (I) SHRSH ??(I) wherein R is an aliphatic or aromatic group composed of 3-12 atoms.Type: ApplicationFiled: June 11, 2015Publication date: May 11, 2017Applicant: BRIDGESTONE CORPORATIONInventors: Giancarlo COSSU, Pasquale AGORETTI
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Publication number: 20170121506Abstract: A rubber compound for tyres comprising at least a cross-linkable polymer base, a reinforcing filler, a reinforcing resin and a vulcanization system comprising at least sulphur and an organic peroxide chemical.Type: ApplicationFiled: June 11, 2015Publication date: May 4, 2017Applicant: BRIDGESTONE CORPORATIONInventors: Giancarlo COSSU, Dennis RETTURA, Pasquale AGORETTI
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Publication number: 20170114207Abstract: A method for preparing a rubber compound comprising at least one first mixing step in which at least part of a cross-linkable polymer base is mixed at least with a reactive reinforcing filler, a dendrimer functionalized with polar groups adapted to interact with the reactive reinforcing filler and a nucleophile agent; and a subsequent mixing step in which the compound being prepared is mixed with a vulcanization system.Type: ApplicationFiled: June 12, 2015Publication date: April 27, 2017Applicant: BRIDGESTONE CORPORATIONInventors: Giancarlo COSSU, Pasquale AGORETTI
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Patent number: 9534093Abstract: A method of producing a rubber compound containing silica, the method including a step of dispersing the silica in a polymer base, and a following step of mixing the previously formed mixture with curing agents. The step of dispersing the silica in the polymer base includes the following sequence of operations: soaking the polymer base in a liquid silica precursor to form a swollen polymer; —adding the swollen polymer to an organic solvent, and continually stirring the swollen polymer solution; —adding water and a silica synthesizing catalyst to the swollen polymer solution; —precipitating a polymer gel matrix by adding a precipitating agent; —separating and washing the precipitated polymer gel matrix.Type: GrantFiled: April 18, 2013Date of Patent: January 3, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Francesco Botti, Alessandra Bartoloni, Giancarlo Cossu
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Patent number: 9487643Abstract: A tire rubber compound having at least one cross-linkable, unsaturated-chain polymer base, and a curing system of at least sulphur, stearic acid, zinc oxide, and a chelating agent for complexing the zinc ion.Type: GrantFiled: December 24, 2012Date of Patent: November 8, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Gianluca Forte, Giancarlo Cossu
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Publication number: 20160280886Abstract: A rubber compound for tyres comprising a cross-linkable unsaturated chain polymer base comprising, in turn, at least a rubber of synthetic origin, a silica-free filler at least partially comprising carbon black, a vulcanization system and a mercapto carboxylic acid.Type: ApplicationFiled: December 19, 2014Publication date: September 29, 2016Applicant: BRIDGESTONE CORPORATIONInventors: Giancarlo COSSU, Gianluca FORTE
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Publication number: 20150307695Abstract: A tyre rubber compound having at least one cross-linkable, unsaturated-chain polymer base, and a curing system of at least sulphur, stearic acid, zinc oxide, and a chelating agent for complexing the zinc ion.Type: ApplicationFiled: December 24, 2012Publication date: October 29, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Gianluca FORTE, Giancarlo COSSU
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Publication number: 20150119516Abstract: A method of producing a rubber compound containing silica, the method including a step of dispersing the silica in a polymer base, and a following step of mixing the previously formed mixture with curing agents. The step of dispersing the silica in the polymer base includes the following sequence of operations: soaking the polymer base in a liquid silica precursor to form a swollen polymer; —adding the swollen polymer to an organic solvent, and continually stirring the swollen polymer solution; —adding water and a silica synthesizing catalyst to the swollen polymer solution; —precipitating a polymer gel matrix by adding a precipitating agent; —separating and washing the precipitated polymer gel matrix.Type: ApplicationFiled: April 18, 2013Publication date: April 30, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Francesco Botti, Alessandra Bartoloni, Giancarlo Cossu