Patents by Inventor Leonid Rappoport
Leonid Rappoport 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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Patent number: 9670324Abstract: A composition of the formulae MZAORSnR1F1mOAZ1M1, wherein O and S have their normal meaning of oxygen and sulfur, n is at least 2 and not more than 8, F1 is of the formula —OAORSnR1—, m is at least 1, Z and Z1 are the same or different and are oxy or amino, M and M1 are the same or different and are hydrogen or an organic substituent, R and R1 are the same or different and are organic divalent radicals, each having from 2 to 20 carbon atoms, and A is the residue of a dicarboxylic acid of from 2 to 40 carbon atoms.Type: GrantFiled: January 13, 2016Date of Patent: June 6, 2017Assignee: Chevron Phillips Chemical Company LPInventors: Leonid Rappoport, Aleksander Yam, Alexander Vainer
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Publication number: 20160130401Abstract: A composition of the formulae MZAORSnR1F1mOAZ1M1, wherein O and S have their normal meaning of oxygen and sulfur, n is at least 2 and not more than 8, F1 is of the formula —OAORSnR1—, m is at least 1, Z and Z1 are the same or different and are oxy or amino, M and M1 are the same or different and are hydrogen or an organic substituent, R and R1 are the same or different and are organic divalent radicals, each having from 2 to 20 carbon atoms, and A is the residue of a dicarboxylic acid of from 2 to 40 carbon atoms.Type: ApplicationFiled: January 13, 2016Publication date: May 12, 2016Inventors: Leonid RAPPOPORT, Aleksander YAM, Alexander VAINER
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Patent number: 8889802Abstract: A composition comprising a reaction product of reactants comprising (a) a compound comprising (i) a polysulfide moiety and (ii) an oxygen atom in a ?-position to a sulfur link having the formula: where each R is independently selected from H or a C1 to C20 organyl group, R? is independently selected from a C1 to C20 organyl group, R?? is independently selected from H or a C1 to C20 organyl group, and x has an average of greater than 2, (b) a compound comprising a nucleophilic moiety; and (c) a compound comprising a moiety reactive to active hydrogen.Type: GrantFiled: January 31, 2012Date of Patent: November 18, 2014Assignee: POLYMERight, Inc.Inventors: Leonid Rappoport, Alexander Vainer, Aleksander Yam
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Patent number: 8378060Abstract: A composition of the formulae MZAORSnR1F1mOAZ1M1, wherein O and S have their normal meaning of oxygen and sulfur, n is at least 2 and not more than 8, F1 is of the formula —OAORSnR1—, m is at least 1, Z and Z1 are the same or different and are oxy or amino, M and M1 are the same or different and are hydrogen or an organic substituent, R and R1 are the same or different and are organic divalent radicals, each having from 2 to 20 carbon atoms, and A is the residue of a dicarboxylic acid of from 2 to 40 carbon atoms.Type: GrantFiled: March 22, 2012Date of Patent: February 19, 2013Assignee: POLYMERight, Inc.Inventors: Leonid Rappoport, Aleksander Yam, Alexander Vainer
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Publication number: 20120238718Abstract: A composition of the formulae MZAORSnR1F1mOAZ1M1, wherein O and S have their normal meaning of oxygen and sulfur, n is at least 2 and not more than 8, F1 is of the formula —OAORSnR1—, m is at least 1, Z and Z1 are the same or different and are oxy or amino, M and M1 are the same or different and are hydrogen or an organic substituent, R and R1 are the same or different and are organic divalent radicals, each having from 2 to 20 carbon atoms, and A is the residue of a dicarboxylic acid of from 2 to 40 carbon atoms.Type: ApplicationFiled: March 22, 2012Publication date: September 20, 2012Applicant: POLYMERIGHT, INC.Inventors: Leonid RAPPOPORT, Aleksander YAM, Alex VAINER
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Publication number: 20120130040Abstract: A composition comprising a reaction product of reactants comprising (a) a compound comprising (i) a polysulfide moiety and (ii) an oxygen atom in a ?-position to a sulfur link having the formula: where each R is independently selected from H or a C1 to C20 organyl group, R? is independently selected from a C1 to C20 organyl group, R?? is independently selected from H or a C1 to C20 organyl group, and x has an average of greater than 2, (b) a compound comprising a nucleophilic moiety; and (c) a compound comprising a moiety reactive to active hydrogen.Type: ApplicationFiled: January 31, 2012Publication date: May 24, 2012Applicant: POLYMERIGHT, INC.Inventors: Leonid RAPPOPORT, Alexander VAINER, Aleksander YAM
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Patent number: 8158726Abstract: The present invention provides poly(thioesters) and monomeric diesters, produced from di(hydroxyethyl)polysulfides and various mono- and di-basic carbonic acids or their anhydrides, and their derivatives. The new compounds combine properties of polyesters and polysulfides. The poly(thioesters) can be used as components in many compositions, including but not limited to adhesives, sealants, caulks, coatings, plastics, paints and elastomers. The monomeric diesters find use in compositions such as solvents and plasticizers.Type: GrantFiled: June 28, 2006Date of Patent: April 17, 2012Assignee: Polymeright, Inc.Inventors: Leonid Rappoport, Aleksander Yam, Alex Vainer
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Patent number: 8138278Abstract: A composition comprising a reaction product of reactants comprising (a) a compound comprising (i) a polysulfide moiety and (ii) an oxygen atom in a ?-position to a sulfur link having the formula: where each R is independently selected from H or a C1 to C20 organyl group, R? is independently selected from a C1 to C20 organyl group, R?? is independently selected from H or a C1 to C20 organyl group, and x has an average of greater than 2, (b) a compound comprising a nucleophilic moiety; and (c) a compound comprising a moiety reactive to active hydrogen.Type: GrantFiled: June 25, 2010Date of Patent: March 20, 2012Assignee: POLYMERight, Inc.Inventors: Leonid Rappoport, Alexander Vainer, Aleksander Yam
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Publication number: 20110152492Abstract: A composition comprising a reaction product of reactants comprising (a) a compound comprising (i) a polysulfide moiety and (ii) an oxygen atom in a ?-position to a sulfur link having the formula: where each R is independently selected from H or a C1 to C20 organyl group, R? is independently selected from a C1 to C20 organyl group, R?? is independently selected from H or a C1 to C20 organyl group, and x has an average of greater than 2, (b) a compound comprising a nucleophilic moiety; and (c) a compound comprising a moiety reactive to active hydrogen.Type: ApplicationFiled: June 25, 2010Publication date: June 23, 2011Applicant: POLYMERIGHT, INC.Inventors: Leonid RAPPOPORT, Alexander VAINER, Aleksander YAM
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Publication number: 20070015902Abstract: The present invention provides poly(thioesters) and monomeric diesters, produced from di(hydroxyethyl)polysulfides and various mono- and di-basic carbonic acids or their anhydrides, and their derivatives. The new compounds combine properties of polyesters and polysulfides. The poly(thioesters) can be used as components in many compositions, including but not limited to adhesives, sealants, caulks, coatings, plastics, paints and elastomers. The monomeric diesters find use in compositions such as solvents and plasticizers.Type: ApplicationFiled: June 28, 2006Publication date: January 18, 2007Inventors: Leonid Rappoport, Aleksander Yam, Alex Valner
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Patent number: 7087708Abstract: Compounds and polymers of such compounds are prepared based on the reaction product of a polysulfide containing diol and a dibasic acid, conveniently using an acid catalyst for the reaction. By appropriate choice of mole ratios, the resulting compound may have a hydroxyl and carboxyl, two hydroxyls or two carboxyls as terminal groups. The compounds can be modified by adding augmenting groups to change the terminal groups or properties of the monomer. The polymers find advantageous use as adhesives, sealants, coatings, paints, elastomers, plastic formulations, fibers, films and molded objects.Type: GrantFiled: April 16, 2004Date of Patent: August 8, 2006Assignee: Polymeright, Inc.Inventors: Leonid Rappoport, Aleksander Yam, Alex Vainer
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Publication number: 20050143557Abstract: Compounds and polymers of such compounds are prepared based on the reaction product of a polysulfide containing diol and a dibasic acid, conveniently using an acid catalyst for the reaction. By appropriate choice of mole ratios, the resulting compound may have a hydroxyl and carboxyl, two hydroxyls or two carboxyls as terminal groups. The compounds can be modified by adding augmenting groups to change the terminal groups or properties of the monomer. The polymers find advantageous use as adhesives, sealants, coatings, paints, elastomers, plastic formulations, fibers, films and molded objects.Type: ApplicationFiled: February 25, 2005Publication date: June 30, 2005Inventors: Leonid Rappoport, Aleksander Yam, Alex Vainer
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Publication number: 20040230030Abstract: Compounds and polymers of such compounds are prepared based on the reaction product of a polysulfide containing diol and a dibasic acid, conveniently using an acid catalyst for the reaction. By appropriate choice of mole ratios, the resulting compound may have a hydroxyl and carboxyl, two hydroxyls or two carboxyls as terminal groups. The compounds can be modified by adding augmenting groups to change the terminal groups or properties of the monomer. The polymers find advantageous use as adhesives, sealants, coatings, paints, elastomers, plastic formulations, fibers, films and molded objects.Type: ApplicationFiled: April 16, 2004Publication date: November 18, 2004Inventors: Leonid Rappoport, Aleksander Yam, Alex Vainer
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Patent number: 6590011Abstract: An epoxy-amine composition includes an epoxy resin, an amine curative and a latent catalyst. The latent catalyst does not cause the instant acceleration of the reaction between epoxides and amines. In the presence of radiation, the latent catalyst generates an active catalyst that accelerates/initiates the cure process of the epoxy-amine composition.Type: GrantFiled: April 30, 2001Date of Patent: July 8, 2003Assignee: Polymeright, Inc.Inventors: Leonid Rappoport, Alex Vainer, Aleksander Yam
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Patent number: 6495637Abstract: A formulation to produce urethane linkages reacts cyclocarbonate groups with diamines. Aliphatic polyhydroxyl precursor molecules are first epoxidized. The invention does not require complete epoxidation, as it makes use of the un-epoxidized hydroxyl groups of the precursor molecule. These hydroxyl groups are combined with isocyanate groups of prepolymer molecules to form urethane links. The use of prepolymers increases the networking, flexibility, and impact-resistance of the final product. The known formulations for amine hardeners also require complete carbonation of the epoxy groups to form reactive cyclocarbonate groups, which are reacted with diamines to form an amine hardener. In the proposed invention, both cyclocarbonate and epoxy groups are used to combine with the different diamine molecules by making use of the different reactivities of aliphatic, cycloaliphatic, and aromatic amine groups.Type: GrantFiled: February 22, 2001Date of Patent: December 17, 2002Assignee: 3L & T, Inc.Inventor: Leonid Rappoport
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Publication number: 20020169272Abstract: Polyfunctional polymerizable urethane- or urea-containing oligomers allow the design, adjustment, and regulation of chemical and physical properties of the described oligomers. The invention discloses the formulas and compositions of these oligomers and methods of their synthesis. The described oligomers can be used for many purposes, both directly and in combination with other chemicals in multiple applications such as adhesives, sealants, coatings, composites, etc., as well as in castable and moldable materials.Type: ApplicationFiled: March 19, 2002Publication date: November 14, 2002Inventors: Leonid Rappoport, Alex Vainer, Aleksander Yam
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Patent number: 6465597Abstract: An epoxy-amine composition includes an epoxy resin, an amine curing agent and elemental sulfur as a cure accelerator. The degree of acceleration is highly regulated by the concentration of sulfur in the epoxy-amine composition and the time and conditions of the contact between sulfur and the amine curing agent of the epoxy-amine composition.Type: GrantFiled: July 18, 2001Date of Patent: October 15, 2002Assignee: Polymeright, Inc.Inventors: Leonid Rappoport, Alex Vainer, Aleksander Yam
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Patent number: 6369188Abstract: Polyfunctional polymerizable urethane- or urea-containing oligomers allow the design, adjustment, and regulation of chemical and physical properties of the described oligomers. The invention discloses the formulas and compositions of these oligomers, methods of their synthesis, and methods of converting the described oligomers into useful polymeric products. The described oligomers can be used for many purposes, both directly and in combination with other chemicals in multiple applications such as adhesives, sealants, coatings, composites, etc., as well as in castable and moldable materials.Type: GrantFiled: March 27, 1999Date of Patent: April 9, 2002Assignee: Polymeright, Inc.Inventors: Leonid Rappoport, Alex Vainer, Aleksandr Yam
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Publication number: 20010008924Abstract: A formulation to produce urethane linkages reacts cyclocarbonate groups with diamines. Aliphatic polyhydroxyl precursor molecules are first epoxidized. The invention does not require complete epoxidation, as it makes use of the unepoxidized hydroxyl groups of the precursor molecule. These hydroxyl groups are combined with isocyanate groups of prepolymer molecules to form urethane links. The use of prepolymers increases the networking, flexibility, and impact-resistance of the final product. The known formulations for amine hardeners also require complete carbonation of the epoxy groups to form reactive cyclocarbonate groups, which are reacted with diamines to form an amine hardener. In the proposed invention, both cyclocarbonate and epoxy groups are used to combine with the different diamine molecules by making use of the different reactivities of aliphatic, cycloaliphatic, and aromatic amine groups.Type: ApplicationFiled: February 22, 2001Publication date: July 19, 2001Inventor: Leonid Rappoport
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Patent number: 6218480Abstract: A formulation to produce urethane linkages reacts cyclocarbonate groups with diamines. Aliphatic polyhydroxyl precursor molecules are first epoxidized. The invention does not require complete epoxidation, as it makes use of the un-epoxidized hydroxyl groups of the precursor molecule. These hydroxyl groups are combined with isocyanate groups of prepolymer molecules to form urethane links. The use of prepolymers increases the networking, flexibility, and impact-resistance of the final product. The known formulations for amine hardeners also require complete carbonation of the epoxy groups to form reactive cyclocarbonate groups, which are reacted with diamines to form an amine hardener. In the proposed invention, both cyclocarbonate and epoxy groups are used to combine with the different diamine molecules by making use of the different reactivities of aliphatic, cycloaliphatic, and aromatic amine groups.Type: GrantFiled: June 16, 1997Date of Patent: April 17, 2001Assignee: MMR Technologies, Inc.Inventor: Leonid Rappoport