Patents by Inventor Sumitra Rajagopalan

Sumitra Rajagopalan 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).

  • Publication number: 20220372293
    Abstract: There are provided self-healing elastomeric materials and compositions and skin-like materials for use in a wide range of applications, particularly medical training simulators and mannequins. The self-healing elastomeric material comprises polysiloxane or poly ether soft segments connected via carbonate, urethane and/or urea bonds. The self-healing elastomeric material is intrinsically and/or thermally self- healing. Reusable devices, apparatuses and articles comprising the elastomeric materials as skin-like materials are disclosed.
    Type: Application
    Filed: October 21, 2020
    Publication date: November 24, 2022
    Inventors: Sumitra RAJAGOPALAN, Maksym KRYUCHKOV, Nicholas COTTENYE, Jean-Richard BULLET
  • Patent number: 11446324
    Abstract: The present disclosure relates generally to sol-gel polymer composites that comprise chitosan, a hydrophilic polymer, a polysiloxane, and a gelation agent in a suitable medium. Advantageously, the sol-gel polymer composite can form a durable seal or strong solid in response to one or more physiological stimulus. The disclosure further relates to medical and veterinary uses of the composite, particularly, methods and delivery systems for reducing or preventing the incidence of a mammary disorder in a dairy animal. More particularly, the disclosure includes methods and sol-gel polymer composite compositions for creating a physical barrier on the teat surface or in the teat canal or cistern of a non-human animal for prophylactic treatment of mammary disorders such as mastitis wherein the sol-gel polymer creates a seal in response to one or more physiological stimulus.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: September 20, 2022
    Assignee: Zoetis Services LLC
    Inventors: Christina Lee Brown, Derek James Sheehan, John Mark Heimlich, Todd Foster, Jeffrey Ellis Price, Sumitra Rajagopalan, Alexandre Therrien, Oscar Suarez, Nicholas Finn Cunningham
  • Publication number: 20210115220
    Abstract: There are provided stretchable solid-state electroactive polymer actuators (SSEPA) using electroactive polymers that convert between electrical energy and mechanical energy and having solid-state polymer electrolytes. More particularly, there are provided electroactive polymer (EAP) compositions comprising: 15-60 wt. % of a film-forming polymer; 5-40 wt. % of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and 10-40 wt. % of a plasticizer, solid-state polymer electrolyte (SPE) compositions comprising: 20-60 wt. % of a plasticizer, 10-60 wt. % of a film-forming polymer and 5-25 wt. % of an ionizable salt. The use of these EAP and SPE compositions in electromechanical devices, such as solid-state actuators, generators, sensors, and other energy transducers in various applications are also disclosed.
    Type: Application
    Filed: June 4, 2019
    Publication date: April 22, 2021
    Inventors: Sumitra RAJAGOPALAN, Prajwal KUMAR, Oscar SUAREZ, Sajjad SAEIDLOU, Maksym KRYUCHKOV, Mathieu RAMANANARIVO, Alexey TOKAREV, Nicolas COTTENYE, Julien PLATHIER
  • Patent number: 10837143
    Abstract: There are provided thermoregulatory coatings for paper comprising a nano structured phase change material (PCM) and a protective layer, the PCM including a first agent that undergoes an endothermic phase transition at a desired temperature and a second agent that assists in maintaining a nano structure, and the protective layer providing a basecoat, a top-coat, or both. There are also provided coated papers and articles comprising such coatings, and methods for preparation thereof. Coated papers and articles provided herein have a wide range of application, for example in packaging or transport of temperature-sensitive materials.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: November 17, 2020
    Assignee: BIOASTRA TECHNOLOGIES, INC.
    Inventors: Sumitra Rajagopalan, Wilms Baille, Piotr Kujawa, Abhilash Kulkarni
  • Patent number: 10729698
    Abstract: The present disclosure relates generally to sol-gel polymer composites that comprise chitosan, a hydrophilic polymer, a gelation agent, and optional additional ingredients in a suitable medium. Advantageously, the sol-gel polymer composite can form a durable seal or strong solid in response to one or more physiological stimulus. The disclosure further relates to medical and veterinary uses of the composite, particularly, methods and delivery systems for reducing or preventing the incidence of a mammary disorder in a dairy animal. More particularly, the disclosure includes methods and sol-gel polymer composite compositions for creating a physical barrier on the teat surface or in the teat canal or cistern of a non-human animal for prophylactic treatment of mammary disorders such as mastitis wherein the sol-gel polymer creates a seal in response to one or more physiological stimulus.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: August 4, 2020
    Assignee: Zoetis Services LLC
    Inventors: Sumitra Rajagopalan, Wilms Baille, Piotr Kujawa, Christopher A. Zook, Rebecca R. Quesnell, Dennis L. Huczek, Stephen L. Secreast, Laibin Luo, Tammy A. Sanders
  • Publication number: 20190092992
    Abstract: Nanostructured phase change materials (PCMs) which are heterogeneous materials having at least two phases, at least one of the phases having at least one of its dimensions in the nanoscale, and comprising a first agent that undergoes an endothermic phase transition at a desired temperature and a second agent that assists in maintaining a nanostructure, are provided. There are also provided methods for manufacturing such PCMs, and applications thereof for providing thermoregulatory coatings and articles containing such coatings for use in a wide range of applications, such as cooling textiles, wipes, packaging, films, walls and building materials.
    Type: Application
    Filed: May 3, 2018
    Publication date: March 28, 2019
    Inventors: Sumitra RAJAGOPALAN, Giovanni Alexander FABRA PRIETO
  • Publication number: 20190030043
    Abstract: The present disclosure relates generally to sol-gel polymer composites that comprise chitosan, a hydrophilic polymer, a gelation agent, and optional additional ingredients in a suitable medium. Advantageously, the sol-gel polymer composite can form a durable seal or strong solid in response to one or more physiological stimulus. The disclosure further relates to medical and veterinary uses of the composite, particularly, methods and delivery systems for reducing or preventing the incidence of a mammary disorder in a dairy animal. More particularly, the disclosure includes methods and sol-gel polymer composite compositions for creating a physical barrier on the teat surface or in the teat canal or cistern of a non-human animal for prophylactic treatment of mammary disorders such as mastitis wherein the sol-gel polymer creates a seal in response to one or more physiological stimulus.
    Type: Application
    Filed: August 8, 2018
    Publication date: January 31, 2019
    Inventors: Sumitra Rajagopalan, Wilms Baille, Piotr Kujawa, Christopher A. Zook, Rebecca R. Quesnell, Dennis L. Huczek, Stephen L. Secreast, Laibin Luo, Tammy A. Sanders
  • Publication number: 20180303866
    Abstract: The present disclosure relates generally to sol-gel polymer composites that comprise chitosan, a hydrophilic polymer, a polysiloxane, and a gelation agent in a suitable medium. Advantageously, the sol-gel polymer composite can form a durable seal or strong solid in response to one or more physiological stimulus. The disclosure further relates to medical and veterinary uses of the composite, particularly, methods and delivery systems for reducing or preventing the incidence of a mammary disorder in a dairy animal. More particularly, the disclosure includes methods and sol-gel polymer composite compositions for creating a physical barrier on the teat surface or in the teat canal or cistern of a non-human animal for prophylactic treatment of mammary disorders such as mastitis wherein the sol-gel polymer creates a seal in response to one or more physiological stimulus.
    Type: Application
    Filed: April 19, 2018
    Publication date: October 25, 2018
    Inventors: Christina Lee Brown, Derek James Sheehan, John Mark Heimlich, Todd Foster, Jeffrey Ellis Price, Sumitra Rajagopalan, Alexandre Therrien, Oscar Suarez, Nicholas Finn Cunningham
  • Patent number: 10064870
    Abstract: The present disclosure relates generally to sol-gel polymer composites that comprise chitosan, a hydrophilic polymer, a gelation agent, and optional additional ingredients in a suitable medium. Advantageously, the sol-gel polymer composite can form a durable seal or strong solid in response to one or more physiological stimulus. The disclosure further relates to medical and veterinary uses of the composite, particularly, methods and delivery systems for reducing or preventing the incidence of a mammary disorder in a dairy animal. More particularly, the disclosure includes methods and sol-gel polymer composite compositions for creating a physical barrier on the teat surface or in the teat canal or cistern of a non-human animal for prophylactic treatment of mammary disorders such as mastitis wherein the sol-gel polymer creates a seal in response to one or more physiological stimulus.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: September 4, 2018
    Assignee: Zoetis Services LLC
    Inventors: Sumitra Rajagopalan, Wilms Baille, Piotr Kujawa, Christopher A. Zook, Rebecca R. Quesnell, Dennis L. Huczek, Stephen L. Secreast, Laibin Luo, Tammy A. Sanders
  • Patent number: 9963627
    Abstract: Nanostructured phase change materials (PCMs) which are heterogeneous materials having at least two phases, at least one of the phases having at least one of its dimensions in the nanoscale, and comprising a first agent that undergoes an endothermic phase transition at a desired temperature and a second agent that assists in maintaining a nanostructure, are provided. There are also provided methods for manufacturing such PCMs, and applications thereof for providing thermoregulatory coatings and articles containing such coatings for use in a wide range of applications, such as cooling textiles, wipes, packaging, films, walls and building materials.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: May 8, 2018
    Inventors: Sumitra Rajagopalan, Giovanni Alexander Fabra Prieto
  • Publication number: 20170175339
    Abstract: There are provided thermoregulatory coatings for paper comprising a nano structured phase change material (PCM) and a protective layer, the PCM including a first agent that undergoes an endothermic phase transition at a desired temperature and a second agent that assists in maintaining a nano structure, and the protective layer providing a basecoat, a top-coat, or both. There are also provided coated papers and articles comprising such coatings, and methods for preparation thereof. Coated papers and articles provided herein have a wide range of application, for example in packaging or transport of temperature-sensitive materials.
    Type: Application
    Filed: May 14, 2015
    Publication date: June 22, 2017
    Inventors: Sumitra RAJAGOPALAN, Wilms BAILLE, Piotr KUJAWA, Abhilash KULKARNI
  • Publication number: 20170119785
    Abstract: The present disclosure relates generally to sol-gel polymer composites that comprise chitosan, a hydrophilic polymer, a gelation agent, and optional additional ingredients in a suitable medium. Advantageously, the sol-gel polymer composite can form a durable seal or strong solid in response to one or more physiological stimulus. The disclosure further relates to medical and veterinary uses of the composite, particularly, methods and delivery systems for reducing or preventing the incidence of a mammary disorder in a dairy animal. More particularly, the disclosure includes methods and sol-gel polymer composite compositions for creating a physical barrier on the teat surface or in the teat canal or cistern of a non-human animal for prophylactic treatment of mammary disorders such as mastitis wherein the sol-gel polymer creates a seal in response to one or more physiological stimulus.
    Type: Application
    Filed: November 2, 2016
    Publication date: May 4, 2017
    Inventors: SUMITRA RAJAGOPALAN, WILMS BAILLE, PIOTR KUJAWA, Christopher A. Zook, Rebecca R. Quesnell, Dennis L. Huczek, Stephen L. Secreast, Laibin Luo, Tammy A. Sanders
  • Publication number: 20150291868
    Abstract: Nanostructured phase change materials (PCMs) which are heterogeneous materials having at least two phases, at least one of the phases having at least one of its dimensions in the nanoscale, and comprising a first agent that undergoes an endothermic phase transition at a desired temperature and a second agent that assists in maintaining a nanostructure, are provided. There are also provided methods for manufacturing such PCMs, and applications thereof for providing thermoregulatory coatings and articles containing such coatings for use in a wide range of applications, such as cooling textiles, wipes, packaging, films, walls and building materials.
    Type: Application
    Filed: November 12, 2013
    Publication date: October 15, 2015
    Inventors: Sumitra Rajagopalan, Giovanni Alexander Fabra Prieto