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).

  • Patent number: 11827807
    Abstract: 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: Grant
    Filed: July 7, 2020
    Date of Patent: November 28, 2023
    Assignee: Novelis Inc.
    Inventors: Corrado Bassi, Michéle Edith Berner, Sabyasachi Gaan, Patrik Schmutz
  • Publication number: 20220340763
    Abstract: 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: Application
    Filed: July 7, 2020
    Publication date: October 27, 2022
    Applicants: Novelis Inc., EMPA, Swiss Federal Laboratories for Materials Science and Technology
    Inventors: Corrado Bassi, Michéle Edith Berner, Sabyasachi Gaan, Patrik Schmutz
  • Publication number: 20210371591
    Abstract: 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: Application
    Filed: May 20, 2019
    Publication date: December 2, 2021
    Applicant: EMPA Eidgenoessische Materialpruefungs- und Forschungsanstalt
    Inventors: Sabyasachi GAAN, Rudolf HUFENUS, Rashid NAZIR, Pietro SIMONETTI, Khalifah SALMEIA, Dambarudhar PARIDA, Ali GOONEIE
  • Patent number: 10968204
    Abstract: 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: Grant
    Filed: October 9, 2017
    Date of Patent: April 6, 2021
    Assignees: Bruag Fire Protection AG, EMPA Swiss Federal Laboratories for Materials Science and Technology
    Inventors: Khalifah Salmeia, Sabyasachi Gaan, Markus Brühwiler
  • Publication number: 20200039962
    Abstract: 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: Application
    Filed: October 9, 2017
    Publication date: February 6, 2020
    Inventors: Khalifah Salmeia, Sabyasachi Gaan, Markus Brühwiler
  • Patent number: 10072212
    Abstract: 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 integer
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: September 11, 2018
    Assignee: EMPA Eidgenossische Materialprufungs-Und Forschungsanstalt
    Inventors: Timea Stelzig, Lea Bommer, Sabyasachi Gaan, Aleksandra Buczko, Rudolf Hufenus, Giuseppino Fortunato, Benno Wüst, Pierluigi Barbadoro
  • Patent number: 9650497
    Abstract: 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: Grant
    Filed: August 6, 2012
    Date of Patent: May 16, 2017
    Assignees: EMPA EIDGENOSSISCHE MATERIALPRUFUNGS- UND FORSCHUNGSANSTALT, FRITZ NAUER AG
    Inventors: Sabyasachi Gaan, Matthias Neisius, Primo Mercoli, Shuyu Liang, Henri Mispreuve, Reinold Näscher
  • Publication number: 20170081590
    Abstract: 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 integer
    Type: Application
    Filed: March 16, 2015
    Publication date: March 23, 2017
    Applicant: EMPA EIDGENOSSISCHE MATERIAL-PRUFUNGS- UND FORSCHUNGSANSTALT
    Inventors: Timea STELZIG, Lea BOMMER, Sabyasachi GAAN, Aleksandra BUCZKO
  • Publication number: 20140343183
    Abstract: 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: Application
    Filed: August 6, 2012
    Publication date: November 20, 2014
    Applicants: FRITZ NAUER AG, EMPA EIDGENOSSISCHE MATERIALPRUFUNGS- UND FORSCHUNGSANSTALT
    Inventors: Sabyasachi Gaan, Matthias Neisius, Primo Mercoli, Shuyu Liang, Henri Mispreuve, Reinold Nascher