Patents by Inventor Sokolov Sergey Vasilyevich
Sokolov Sergey Vasilyevich 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: 5942598Abstract: Perfluoroalkyleneethertriazine oligomer obtained by reacting a dinitrile compound NC-Rf.sup.0 --CN, where Rf.sup.0 is --(CFXOCF.sub.2).sub.a (CF.sub.2).sub.b (CF.sub.2 OCFX).sub.c --, where X is a fluorine atom or a CF.sub.3 group, a is an integer of 1 to 5, b is an integer of 1 to 2 and c is an integer of 1 to 5, or Rf.sup.0 is --CF.sub.2 O(CF.sub.2 O).sub.d CF.sub.2 --, where d is an integer of 1 to 8 with ammonia, further reacting the resulting diamizine compound with a dinitrile compound NC-Rf.sup.1 --CN, where Rf.sup.1 has the same meaning as that for Rf.sup.0 or Rf.sup.1 is a perfluoroalkylene group having 4 to 8 carbon atoms thereby obtaining a perfluoroalkyleneetherpolyimidoylamizine oligomer, then reacting the resulting oligomer with a perfluoronitrile compound Rf.sup.2 CN, where Rf.sup.2 is CF.sub.3 (OCF.sub.2).sub.e --, where e is an integer of 3 to 10, and then subjecting the resulting terminal-treated oligomer to a ring-closing reaction with a perfluoroacylating agent Rf.sup.3 COY, where Rf.sup.Type: GrantFiled: December 26, 1996Date of Patent: August 24, 1999Assignees: Nippon Mektron, Limited, S.V. LebedevInventors: Riichi Iwa, Haruyoshi Tatsu, Sokolov Sergey Vasilyevich, Kollar Alexander Nikolaevich
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Patent number: 5789532Abstract: Perfluoroalkyleneethertriazine oligomer obtained by reacting a dinitrile compound NC--RF.sup.0 --CN where Rf.sup. is --(CFXOCF.sub.2)a(CF.sub.2)b(CF.sub.2 OCFX)c--, where X is a fluorine atom or a CF.sub.3 group, a is an integer of 1 to 5, b is an integer of 1 to 2 and c is an integer of 1 to 5, or Rf.sup.0 is --CF.sub.2 O(CF.sub.2 O)dCF.sub.2 --, where d is an integer of 1 to 8, with ammonia, further reacting the resulting diamizine compound with a dinitrile compound NC--Rf.sup.1 --CN, Rf.sup.1 has the same meaning as that for Rf.sup.0 or Rf.sup.1 is a perfluoroalkylene group having 4 to 8 carbon atoms thereby obtaining a perfluoroalkyleneetherpolyimidoylamizine oligomer, then reacting the resulting oligomer with a perfluoronitrile compound Rf.sup.2 CN, Rf.sup.2 is CF.sub.3 (OCF.sub.2)e-- where e is an integer of 3 to 10 thereby treating the terminal groups thereof, and then subjecting the resulting terminal-treated oligomer to a ring-closing reaction with a perfluoroacylating agent RF.sup.3 COY, Rf.sup.Type: GrantFiled: December 26, 1996Date of Patent: August 4, 1998Assignees: Nippon Mektron, Limited, S.V. LebedevInventors: Riichi Iwa, Haruyoshi Tatsu, Sokolov Sergey Vasilyevich, Kollar Alexander Nikolaevich
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Patent number: 5783659Abstract: Perfluoroalkyleneethertriazine oligomer obtained by reacting a dinitrile compound NC--Rf.sup.0 --CN, where Ff.sup.0 is --(CFXOCF.sub.2)a(CF.sub.2)b(CF.sub.2 OCFX)c--, where X is a fluorine atom or a CF.sub.3 group, a is an integer of 1 to 5, b is an integer of 1 to 2 and c is an integer of 1 to 5, or Rf.sup.0 is --CF.sub.2 O(CF.sub.2 O)dCF.sub.2 --, where d is an integer of 1 to 8, with ammonia, further reacting the resulting diamizine compound with a dinitrile compound NC--RF.sup.1 --CN, RF.sup.1 has the same meaning as that for Rf.sup.0 or Rf.sup.1 is a perfluoroalkylene group having 4 to 8 carbon atoms thereby obtaining a perfluoroalkyleneetherpolyimidoyamizine oligomer, then reacting the resulting oligomer with a perfluoronitrile compound Rf.sup.2 CN, Rf.sup.2 is CF.sub.3 (OCF.sub.2).sub.e -- where e is an integer of 3 to 10 thereby treating the terminal groups thereof, and then subjecting the resulting terminal-treated oligomer to a ring-closing reaction with a perfluoroacylating agent RF.sup.3 COY, Rf.Type: GrantFiled: December 26, 1996Date of Patent: July 21, 1998Assignees: Nippon Mektron, Limited, S.V. LebedevInventors: Riichi Iwa, Haruyoshi Tatsu, Sokolov Sergey Vasilyevich, Kollar Alexander Nikolaevich
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Patent number: 5767204Abstract: A fluorine-containing elastomer composition, which comprises a terpolymer of tetrafluoroethylene, perfluoro(lower alkyl vinyl ether) and a perfluoro unsaturated nitrile compound represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CN,wherein n is an integer of 2 to 5, and a bis(aminophenyl) compound represented by the following general formula as a cross-linking agent: ##STR1## wherein A is an alkylidene group having 1 to 6 carbon atoms or a perfluoroalkylidene group having 1 to 10 carbon atoms and X and Y are a hydroxyl group or an amino group, can produce vulcanized products having good vulcanization physical properties and a.good compression set.Type: GrantFiled: October 16, 1995Date of Patent: June 16, 1998Assignees: Nippon Mektron Limited, The Central Synthetic Rubbers Research InstituteInventors: Riichi Iwa, Haruyoshi Tatsu, Volkova Margarita Alexeevna, Rondarev Dmitrii Stefanovich, Sokolov Sergey Vasilyevich, Greenblat Mark Peysakhovich, Senyushov Lev Nikolaevich
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Patent number: 5736614Abstract: A perfluoro unsaturated nitrile compound represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CNis produced by reaction of chlorine or bromine to a perfluoro unsaturated carboxylic acid ester represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)COORfollowed by reaction with ammonia, thereby converting the ester group to an acid amide group, and then conducting a dehydration reaction and a dehalogenation reaction of the resulting perfluoro unsaturated carboxylic acid amide represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CONH.sub.2in any desired sequence, and is effectively applied as a cross-linking site monomer for fluorine-containing elastomers.Type: GrantFiled: October 18, 1996Date of Patent: April 7, 1998Assignees: Nippon Mektron Limited, The Central Synthetic Rubbers Research InstituteInventors: Satoru Saito, Riichi Iwa, Haruyoshi Tatsu, Rondarev Dmitrii Stefanovich, Sokolov Sergey Vasilyevich, Berenblit Vsevolod Vulfovich
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Patent number: 5717037Abstract: A perfluoro unsaturated nitrile compound represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CNis produced by reaction of chlorine or bromine to a perfluoro unsaturated carboxylic acid ester represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)COORfollowed by reaction with ammonia, thereby converting the ester group to an acid amide group, and then conducting a dehydration reaction and a dehalogenation reaction of the resulting perfluoro unsaturated carboxylic acid amide represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CONH.sub.2in any desired sequence, and is effectively applied as a cross-linking site monomer for fluorine-containing elastomers.Type: GrantFiled: October 18, 1996Date of Patent: February 10, 1998Assignees: Nippon Mektron Limited, The Central Synthetic Rubbers Research InstituteInventors: Satoru Saito, Riichi Iwa, Haruyoshi Tatsu, Rondarev Dmitrii Stefanovich, Sokolov Sergey Vasilyevich, Berenblit Vsevolod Vulfovich
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Patent number: 5700879Abstract: A fluorine-containing elastomer composition, which comprises a terpolymer of tetrafluoroethylene, perfluoro(lower alkyl vinyl ether) and cyano group-containing (perfluorovinylether) represented by the following general formula:CF.sub.2 .dbd.CF?OCF.sub.2 CF(CF.sub.3)!nCNwherein n is an integer of 1 to 5, and a bis(aminophenyl) compound represented by the following general formula as a cross-linking agent: ##STR1## , wherein A is, for example, an alkylidene group, and X and Y are a hydroxyl group or an amino group, can produce vulcanized products having a good heat resistance and good physical properties, and the bis(aminophenyl) compound has no problem as to its safety.Type: GrantFiled: October 16, 1995Date of Patent: December 23, 1997Assignees: The Central Synthetic Rubbers Research Institute, Nippon Mektron LimitedInventors: Yuichi Yamamoto, Haruyoshi Tatsu, Volkova Margarita Alexeevna, Sokolov Sergey Vasilyevich, Veretennikov Nikolai Vladimirovich
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Patent number: 5681921Abstract: Perfluoroalkyleneethertriazine oligomer obtained by reacting a dinitrile compound NC--Ff.sup.0 --CN, where Ff.sup.0 is --(CFXOCF.sub.2)a(CF.sub.2)b(CF.sub.2 OCFX)c--, where X is a fluorine atom or a CF.sub.3 group, a is an integer of 1 to 5, b is an integer of 1 to 2 and c is an integer of 1 to 5, or Rf.sup.0 is --CF.sub.2 O(CF.sub.2 O)dCF.sub.2 --, where d is an integer of 1 to 8, with ammonia, further reacting the resulting diamizine compound with a dinitrile compound NC--Rf.sup.1 --CN, Rf.sup.1 has the same meaning as that for Rf.sup.0 or Rf.sup.1 is a perfluoroalkylene group having 4 to 8 carbon atoms thereby obtaining a perfluoroalkyleneetherpolyimidoylamizine oligomer, then reacting the resulting oligomer with a perfluoronitrile compound Rf.sup.2 CN, Rf.sup.2 is CF.sub.3 (OCF.sub.2).sub.e -- where e is an integer of 3 to 10 thereby treating the terminal groups thereof, and then subjecting the resulting terminal-treated oligomer to a ring-closing reaction with a perfluoroacylating agent RF.sup.3 COY, Rf.Type: GrantFiled: April 11, 1995Date of Patent: October 28, 1997Assignees: Nippon Mektron, Limited, S.V. LebedevInventors: Riichi Iwa, Haruyoshi Tatsu, Sokolov Sergey Vasilyevich, Kollar Alexander Nikolaevich
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Patent number: 5679851Abstract: A perfluoro unsaturated nitrile compound represented by the following general formula:CF.sub.2 =CFO(CF.sub.2)nOCF(CF.sub.3)CNis produced by reaction of chlorine or bromine to a perfluoro unsaturated carboxylic acid ester represented by the following general formula:CF.sub.2 =CFO(CF.sub.2)nOCF(CF.sub.3)COORfollowed by reaction with ammonia, thereby converting the ester group to an acid amide group, and then conducting a dehydration reaction and a dehalogenation reaction of the resulting perfluoro unsaturated carboxylic acid amide represented by the following general formula:CF.sub.2 =CFO(CF.sub.2)nOCF(CF.sub.3)CONH.sub.2in any desired sequence, and is effectively applied as a cross-linking site monomer for fluorine-containing elastomers.Type: GrantFiled: October 18, 1996Date of Patent: October 21, 1997Assignees: Nippon Mektron Limited, The Central Synthetic Rubbers Research InstituteInventors: Satoru Saito, Riichi Iwa, Haruyoshi Tatsu, Rondarev Dmitrii Stefanovich, Sokolov Sergey Vasilyevich, Berenblit Vsevolod Vulfovich