Patents by Inventor Ravi R. Gupta

Ravi R. Gupta 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: 10774235
    Abstract: The invention relates to a thin, nano-structured coating that provides optical light efficiency enhancement. The dried coating contains nano-structures that provide a very low haze level of less than 2 percent, and a light transmission improvement of at least 1% over the non-coated substrate. For the nano-structured coating on an acrylic substrate the transmission is greater than 93 percent, and preferably greater than 94 percent. The coatings of the invention are especially useful for optical electronic displays and photovoltaic modules.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: September 15, 2020
    Assignee: Arkema France
    Inventors: Jiaxin Jason Ge, Michael T. Burchill, Ravi R. Gupta, Scott Gaboury
  • Patent number: 9548167
    Abstract: The invention relates to an aqueous fluoropolymer, and preferably polyvinylidene fluoride (PVDF), composition for manufacturing electrodes for use in non-aqueous-type electrochemical devices, such as batteries and electric double layer capacitors. The composition contains aqueous PVDF binder, and one or more powdery electrode-forming materials. In one embodiment, the composition is free of fluorinated surfactant In another embodiment, one or more fugitive adhesion promoters are added. The electrode formed from the composition of the invention exhibits interconnectivity and irreversibility that is achieved from the use of aqueous PVDF binder.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: January 17, 2017
    Assignee: Arkema Inc.
    Inventors: Ramin Amin-Sanayei, Ravi R. Gupta
  • Publication number: 20160086742
    Abstract: The invention relates to an aqueous fluoropolymer, and preferably polyvinylidene fluoride (PVDF), composition for manufacturing electrodes for use in non-aqueous-type electrochemical devices, such as batteries and electric double layer capacitors. The composition contains aqueous PVDF binder, and one or more powdery electrode-forming materials. In one embodiment, the composition is free of fluorinated surfactant In another embodiment, one or more fugitive adhesion promoters are added. The electrode formed from the composition of the invention exhibits interconnectivity and irreversibility that is achieved from the use of aqueous PVDF binder.
    Type: Application
    Filed: November 30, 2015
    Publication date: March 24, 2016
    Applicant: Arkema Inc.
    Inventors: Ramin Amin-Sanayei, Ravi R. Gupta
  • Patent number: 9202638
    Abstract: The invention relates to an aqueous fluoropolymer, and preferably polyvinylidene fluoride (PVDF), composition for manufacturing electrodes for use in non-aqueous-type electrochemical devices, such as batteries and electric double layer capacitors. The composition contains aqueous PVDF binder, and one or more powdery electrode-forming materials. In one embodiment, the composition is free of fluorinated surfactant In another embodiment, one or more fugitive adhesion promoters are added. The electrode formed from the composition of the invention exhibits interconnectivity and irreversibility that is achieved from the use of aqueous PVDF binder.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: December 1, 2015
    Assignee: Arkema Inc.
    Inventors: Ramin Amin-Sanayei, Ravi R. Gupta
  • Patent number: 8263695
    Abstract: The invention relates to compositions of polyvinylidene fluoride (PVDF) and its copolymers that have been modified with an onium salt. The PVDF compositions exhibit an increased melting point, a reduced heat distortion and piezo properties. The improved properties can be further enhanced through annealing, and/or the addition of nanoclays. Additionally, the combination of PVDF, nanoclays and annealing can also produce a PVDF with an increased melting point and piezoelectric properties.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: September 11, 2012
    Assignee: Arkema Inc.
    Inventors: Lawrence H. Judovits, Nicholas J. Rodak, Saeid Zerafati, Ravi R. Gupta
  • Publication number: 20120024353
    Abstract: The invention relates to high Tg monolithic and multi-layer thermoformable film or sheet useful as a backsheet on a photovoltaic module (PV). A methacrylic-based material is preferred. The film or sheet is formed of a composition having a Tg greater than 110° C. The methacrylic composition may be a blend of a polymethyl methacrylate polymer and a miscible or semi-miscible high Tg polymer, or may be a copolymer containing primarily methyl methacrylate monomer units. The backsheet is optionally covered with a fluoropolymer or acrylic/fiuoropolymer covering on the outside (side facing the environment). The back-sheet can be clear, white, and/or pigmented. The film or sheet is especially useful in concentrating photovoltaic modules (CPV), and is also useful in thin film photovoltaic modules.
    Type: Application
    Filed: March 1, 2010
    Publication date: February 2, 2012
    Applicant: Arkema France
    Inventors: Jiaxin Jason Ge, Michael T. Burchill, Ravi R. Gupta, Steven B. Lacock, Mark A. Aubart, Robert A. Wanat
  • Publication number: 20110250435
    Abstract: The invention relates to a thin, nano-structured coating that provides optical light efficiency enhancement. The dried coating contains nano-structures that provide a very low haze level of less than 2 percent, and a light transmission improvement of at least 1% over the non-coated substrate. For the nano-structured coating on an acrylic substrate the transmission is greater than 93 percent, and preferably greater than 94 percent. The coatings of the invention are especially useful for optical electronic displays and photovoltaic modules.
    Type: Application
    Filed: October 9, 2009
    Publication date: October 13, 2011
    Inventors: Jiaxin Jason Ge, Michael T. Burchill, Ravi R. Gupta, Scott Gaboury
  • Publication number: 20100304270
    Abstract: The invention relates to an aqueous fluoropolymer, and preferably polyvinylidene fluoride (PVDF), composition for manufacturing electrodes for use in non-aqueous-type electrochemical devices, such as batteries and electric double layer capacitors. The composition contains aqueous PVDF binder, and one or more powdery electrode-forming materials. In one embodiment, the composition is free of fluorinated surfactant In another embodiment, one or more fugitive adhesion promoters are added. The electrode formed from the composition of the invention exhibits interconnectivity and irreversibility that is achieved from the use of aqueous PVDF binder.
    Type: Application
    Filed: May 27, 2010
    Publication date: December 2, 2010
    Applicant: Arkema Inc.
    Inventors: Ramin AMIN-SANAYEI, Ravi R. Gupta
  • Publication number: 20080281031
    Abstract: The invention relates to compositions of polyvinylidene fluoride (PVDF) and its copolymers that have been modified with an onium salt. The PVDF compositions exhibit an increased melting point, a reduced heat distortion and piezo properties. The improved properties can be further enhanced through annealing, and/or the addition of nanoclays. Additionally, the combination of PVDF, nanoclays and annealing can also produce a PVDF with an increased melting point and piezoelectric properties.
    Type: Application
    Filed: December 20, 2006
    Publication date: November 13, 2008
    Inventors: Lawrence H. Judovits, Nicholas J. Rodak, Saeid Zerafati, Ravi R. Gupta