Patents by Inventor Sabyasachi Gaan
Sabyasachi Gaan 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: 11827807Abstract: Described herein are compounds for use in coating compositions and methods of using the same. Also described herein is a method of treating metal products (e.g., aluminum alloy products), including applying the coating composition to at least one surface of the metal product. Further described herein is a joined structure, including the coated aluminum alloy product and another metal or alloy. The coating compositions enhance the bond performance of the joined structures.Type: GrantFiled: July 7, 2020Date of Patent: November 28, 2023Assignee: Novelis Inc.Inventors: Corrado Bassi, Michéle Edith Berner, Sabyasachi Gaan, Patrik Schmutz
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Publication number: 20220340763Abstract: Described herein are compounds for use in coating compositions and methods of using the same. Also described herein is a method of treating metal products (e.g., aluminum alloy products), including applying the coating composition to at least one surface of the metal product. Further described herein is a joined structure, including the coated aluminum alloy product and another metal or alloy. The coating compositions enhance the bond performance of the joined structures.Type: ApplicationFiled: July 7, 2020Publication date: October 27, 2022Applicants: Novelis Inc., EMPA, Swiss Federal Laboratories for Materials Science and TechnologyInventors: Corrado Bassi, Michéle Edith Berner, Sabyasachi Gaan, Patrik Schmutz
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Publication number: 20210371591Abstract: The present invention exploits reactive organophosphorus compounds containing unsaturated vinyl groups, which can be used in a flexible and highly controlled manner to prepare various macromolecular derivatives either via radical reactions or via Michael addition with suitable nucleophiles. Based on the fact that secondary amine groups on the one hand and vinyl groups on the other hand can work as mutual linking sites, an arsenal of novel and useful addition products can be built up. By selecting the number of secondary amine sites and vinyl sites of the participating reaction partners, very different addition products can be formed. In particular, one can form either linear chain type macromolecules (i.e. linear oligomers or polymers) or highly crosslinked network polymers.Type: ApplicationFiled: May 20, 2019Publication date: December 2, 2021Applicant: EMPA Eidgenoessische Materialpruefungs- und ForschungsanstaltInventors: Sabyasachi GAAN, Rudolf HUFENUS, Rashid NAZIR, Pietro SIMONETTI, Khalifah SALMEIA, Dambarudhar PARIDA, Ali GOONEIE
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Patent number: 10968204Abstract: The invention relates to flame retardants comprising atriazine compound according to Formula 1: (1) with R=phosphite substituted with alkyl, functionalized alkyl, aryl, functionalized aryl, except halogen-substituted alkyl or aryl; R?=alkylene, arylene, alkoxy or aryloxy, all unsubstituted or functionalized, except halogen-substituted; X1 and X2=hetero atoms and X1=X2 or X1 not=X2 and to specific triazine compounds as such.Type: GrantFiled: October 9, 2017Date of Patent: April 6, 2021Assignees: Bruag Fire Protection AG, EMPA Swiss Federal Laboratories for Materials Science and TechnologyInventors: Khalifah Salmeia, Sabyasachi Gaan, Markus Brühwiler
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Publication number: 20200039962Abstract: The invention relates to flame retardants comprising atriazine compound according to Formula 1: (1) with R=phosphite substituted with alkyl, functionalized alkyl, aryl, functionalized aryl, except halogen-substituted alkyl or aryl; R?=alkylene, arylene, alkoxy or aryloxy, all unsubstituted or functionalized, except halogen-substituted; X1 and X2=hetero atoms and X1=X2 or X1 not=X2 and to specific triazine compounds as such.Type: ApplicationFiled: October 9, 2017Publication date: February 6, 2020Inventors: Khalifah Salmeia, Sabyasachi Gaan, Markus Brühwiler
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Patent number: 10072212Abstract: The invention relates to novel and improved halogen-free flame retardant compounds having the structure of Formula (I): wherein: R1 and R2 are independently hydrogen, C1-C6 alkyl, —P(O)(OR3)2, —P(O)OR3R4, or —P(O)R32, wherein R3 and R4 are independently C1-C4 alkyl, C6-C12 aryl, C7-C15 aralkyl or C7-C15 alkaryl; or R1 and R2 taken together form an unsaturated cyclic ring, which is optionally substituted by an alkyl group; each k is independently an integer from 1 to 2; each X is independently oxygen (O) or sulphur (S); v is 0 or 1; each Y is independently C1-C4 alkylene, C6 arylene, C7-C15 aralkylene, C7-C15 alkarylene, oxygen (O), nitrogen (NR), wherein R is H or C1-C4 alkyl; n is 0, 1 or 2 with the proviso that n is 1 when Y is oxygen (O) or nitrogen (NR); each Z is independently C1-C4 alkylene, C6 arylene, C7-C15 aralkylene or C7-C15 is alkarylene; m is independently 0, 1 or 2; with the proviso that when Y is oxygen (O) or nitrogen (N), m cannot be 0; each Q is independently C1-C4 alkylene; t is an integerType: GrantFiled: March 16, 2015Date of Patent: September 11, 2018Assignee: EMPA Eidgenossische Materialprufungs-Und ForschungsanstaltInventors: Timea Stelzig, Lea Bommer, Sabyasachi Gaan, Aleksandra Buczko, Rudolf Hufenus, Giuseppino Fortunato, Benno Wüst, Pierluigi Barbadoro
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Patent number: 9650497Abstract: A group of novel compounds containing one or more amino substituted DOPO (9,10-dihydro-9-oxa-phosphaphenthren-10-oxide) moieties. The compounds were found to have good flame retardant properties and also good thermal stability, which makes them particularly suitable as flame retardant additives for various thermoplastic polymers. In particular, they can be incorporated in a polyurethane foam.Type: GrantFiled: August 6, 2012Date of Patent: May 16, 2017Assignees: EMPA EIDGENOSSISCHE MATERIALPRUFUNGS- UND FORSCHUNGSANSTALT, FRITZ NAUER AGInventors: Sabyasachi Gaan, Matthias Neisius, Primo Mercoli, Shuyu Liang, Henri Mispreuve, Reinold Näscher
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Publication number: 20170081590Abstract: The invention relates to novel and improved halogen-free flame retardant compounds having the structure of Formula (I): wherein: R1 and R2 are independently hydrogen, C1-C6 alkyl, —P(O)(OR3)2, —P(O)OR3R4, or —P(O)R32, wherein R3 and R4 are independently C1-C4 alkyl, C6-C12 aryl, C7-C15 aralkyl or C7-C15 alkaryl; or R1 and R2 taken together form an unsaturated cyclic ring, which is optionally substituted by an alkyl group; each k is independently an integer from 1 to 2; each X is independently oxygen (O) or sulphur (S); v is 0 or 1; each Y is independently C1-C4 alkylene, C6 arylene, C7-C15 aralkylene, C7-C15 alkarylene, oxygen (O), nitrogen (NR), wherein R is H or C1-C4 alkyl; n is 0, 1 or 2 with the proviso that n is 1 when Y is oxygen (O) or nitrogen (NR); each Z is independently C1-C4 alkylene, C6 arylene, C7-C15 aralkylene or C7-C15 is alkarylene; m is independently 0, 1 or 2; with the proviso that when Y is oxygen (O) or nitrogen (N), m cannot be 0; each Q is independently C1-C4 alkylene; t is an integerType: ApplicationFiled: March 16, 2015Publication date: March 23, 2017Applicant: EMPA EIDGENOSSISCHE MATERIAL-PRUFUNGS- UND FORSCHUNGSANSTALTInventors: Timea STELZIG, Lea BOMMER, Sabyasachi GAAN, Aleksandra BUCZKO
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Publication number: 20140343183Abstract: A group of novel compounds containing one or more amino substituted DOPO (9,10-dihydro-9-oxa-phosphaphenthren-10-oxide) moieties. The compounds were found to have good flame retardant properties and also good thermal stability, which makes them particularly suitable as flame retardant additives for various thermoplastic polymers. In particular, they can be incorporated in a polyurethane foam.Type: ApplicationFiled: August 6, 2012Publication date: November 20, 2014Applicants: FRITZ NAUER AG, EMPA EIDGENOSSISCHE MATERIALPRUFUNGS- UND FORSCHUNGSANSTALTInventors: Sabyasachi Gaan, Matthias Neisius, Primo Mercoli, Shuyu Liang, Henri Mispreuve, Reinold Nascher