Patents by Inventor Sanjana Das

Sanjana Das 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: 11390758
    Abstract: A free-flowing dry mix of various chemical components can be applied in its dried form, as is contemplated by typical powder coating operations, as well as dispersed within a liquid carrier and applied in liquid form. When liquefied, this bifunctional composition retains similar viscosity to liquid coatings, while simultaneously avoiding any reaction with or degradation by the liquid carrier. The liquefied powder is preferable to existing liquid coatings because it avoids the use of any volatile organic compounds or other solvents, whereas the final, cured coating produced by these bifunctional compositions are indistinguishable regardless of whether they are applied in dry or liquefied form.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: July 19, 2022
    Inventors: Joseph H. James, Sanjana Das
  • Patent number: 11292921
    Abstract: An antimicrobial coating composition is disclosed. The composition delivers several orders of magnitude improvement in the reduction of infectious materials (i.e., microbial substances, including bacteria, fungus, germs, and other pathogens). An advanced high performance antimicrobial coating composition that is able to eliminate and reduce the bacteria and germ count at a log reduction of greater than 5 within 10 minutes of exposure.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: April 5, 2022
    Inventors: Joseph H. James, Sanjana Das
  • Patent number: 11248128
    Abstract: An ultraviolet light absorber (UVA) Universal Composition powder coating is provided. The composition can include about 73.0 to about 78.0 weight percent (wt. %) of a silicone resin, about 2.0 to about 7.0 wt. % of a hardener, about 0.7 to about 1.2 wt. % of a UV stabilizer, about 0.7 to about 1.2 wt. % of a flow modifier, about 15.0 to about 20.0 wt. % of a glass flake, and about 0.1 to about 0.6 wt. % of a catalyst. A UVA additive composition including a plurality of UVA additive particles having a continuous phase of a silicon resin that contains a hardener, a UV stabilizer, a flow modifier, glass flakes, and a catalyst, wherein the plurality of UVA additive particles have a particle size of 0.5 to 100 ?m, is also provided.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: February 15, 2022
    Assignee: PISON IP HOLDCO LLC
    Inventors: Joseph Henry James, Sanjana Das
  • Publication number: 20210380818
    Abstract: A method for creating a multi-functional additive for fusion powder coating compositions that is made from a binder system platform so as to replace the need for multiple conventional additives. The method calls for the multi-functional additive to be provided to fusion powder coating compositions by way of a carrier system selected from (3-aminopropyl) trimethoxysilane (TMS), silicon dioxide (at 45 to 55% active levels), and a flow aid comprising a polyethylene resin, a polyester hydroxyl resin, a polymeric curative, degassing agent, ricinoleic acid, and glass flake.
    Type: Application
    Filed: June 18, 2021
    Publication date: December 9, 2021
    Inventors: Joseph H. James, Sanjana DAS
  • Patent number: 11118071
    Abstract: A mar and scratch resistant additive that possesses multifunctional and other characteristics is described. The additive comprises a binder system platform that is easily introduced into a wide range of chemical coating platforms. The additive may also be introduced to these coatings by way of a silica carrier to simplify its use.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: September 14, 2021
    Assignee: PISON STREAM SOLUTIONS INC.
    Inventors: Joseph H. James, Subadhra Janardhanan, Sanjana Das, Kathleen McAfee
  • Patent number: 11008474
    Abstract: A multi-functional flexibility additive that reduces surface imperfections such as orange peel, facilitates lower viscosity during endothermic reactions, provides high flexibility to the final, cured coating, and possesses chemical resistance is contemplated. The additive is formed as a binder system adhered to a resinous flow aid carrier at a preferred weight ratio of 40:60 (binder:carrier).
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: May 18, 2021
    Assignee: PISON STREAM SOLUTIONS INC.
    Inventors: Joseph H. James, Subadhra Janardhanan, Sanjana Das, Kathleen McAfee
  • Publication number: 20210139714
    Abstract: A multi-functional dispersant that also serves as a flow modifier and rheology modifier is contemplated. The dispersant itself is a mixture, extruded in the presence of water so as to impart moisture to that extrudate, which is formed from polyester resin, curatives, anti-corrosion pigments, UV absorbers, catalysts, flow modifiers, degassers, anti-oxidants and glass flakes. After grinding and optional mixing with a silica carrier, the resulting dispersant may be introduced to solid and liquid (by way of water) finished coating compositions in order to improve various properties of the coating.
    Type: Application
    Filed: November 12, 2019
    Publication date: May 13, 2021
    Inventors: Joseph H. James, Sanjana Das, Subadhra Stoll
  • Publication number: 20210130624
    Abstract: The invention consists of a multi-functional hardness composition that also serves as a mar/scratch resistant additive and flow modifier. The multifunctional hardness composition itself is a mixture of polyester resin, acrylic resin, curative, degassing agent, flow modifier and glass flakes. The multifunctional hardness composition may be introduced to finished coating compositions by way of a silica carrier.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 6, 2021
    Inventors: Joseph H. James, Sanjana Das, Subadhra Stoll
  • Patent number: 10947395
    Abstract: A multi-functional flow modifier that also serves as a wetting agent, gloss control additive, and rheology modifier is contemplated. The flow modifier itself is a mixture of polyurethane masterbatch and hydroxyl acrylic resin (free from any styrene components/resins), curatives, anti-corrosion pigments, degassers, and anti-oxidants. The flow modifier may be introduced to finished coating compositions by way of a silica carrier.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: March 16, 2021
    Assignee: PISON STREAM SOLUTIONS INC.
    Inventors: Joseph H. James, Subadhra Janardhanan, Sanjana Das, Kathleen McAfee
  • Patent number: 10923363
    Abstract: Techniques herein include a method of patterning semiconductor wafers with improved line edge roughness (LER) and/or line width roughness (LWR), including lines below 12 nm in width. An initial bilayer mandrel is formed. The top layer is trimmed to a particular ratio. A reversal material protects uncovered portions of the lower layer, while a central portion is removed, resulting in two mandrels, each one fifth the initial mandrel width. The resulting mandrels are transferred into two underlying layers to form second bilayer mandrels. Sidewall spacers are formed on the second bilayer mandrels, and a fill material can fill remaining spaces. A planarization step can planarize the substrate to a bottom layer of the second bilayer mandrels, which results in a multi-line layer having square profile lines at 1:1 spacing ratio without spacer rounding.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: February 16, 2021
    Assignee: Tokyo Electron Limited
    Inventors: Sanjana Das, Anton J. deVilliers, Daniel Fulford
  • Publication number: 20210035815
    Abstract: Techniques herein include a method of patterning semiconductor wafers with improved line edge roughness (LER) and/or line width roughness (LWR), including lines below 12 nm in width. An initial bilayer mandrel is formed. The top layer is trimmed to a particular ratio. A reversal material protects uncovered portions of the lower layer, while a central portion is removed, resulting in two mandrels, each one fifth the initial mandrel width. The resulting mandrels are transferred into two underlying layers to form second bilayer mandrels. Sidewall spacers are formed on the second bilayer mandrels, and a fill material can fill remaining spaces. A planarization step can planarize the substrate to a bottom layer of the second bilayer mandrels, which results in a multi-line layer having square profile lines at 1:1 spacing ratio without spacer rounding.
    Type: Application
    Filed: August 2, 2019
    Publication date: February 4, 2021
    Inventors: Sanjana Das, Anton J. deVilliers, Daniel Fulford
  • Publication number: 20210032481
    Abstract: An antimicrobial coating composition is disclosed. The composition delivers several orders of magnitude improvement in the reduction of infectious materials (i.e., microbial substances, including bacteria, fungus, germs, and other pathogens). An advanced high performance antimicrobial coating composition that is able to eliminate and reduce the bacteria and germ count at a log reduction of greater than 5 within 10 minutes of exposure.
    Type: Application
    Filed: August 1, 2019
    Publication date: February 4, 2021
    Inventors: Joseph H. James, Sanjana Das
  • Publication number: 20200369894
    Abstract: An ultraviolet absorbing additive is described for chemical compositions. The additive is provided in powdered form, preferably adhered to a silica carrier, thereby allowing it to be introduced into powdered and liquid coating formulations. The additive itself comprises at least 50 wt. % of base resins, including polyester, carboxylated polyester, and epoxy, thereby lending enhanced utility and functionality in ancillary areas such as improved physical properties, flow characteristics, strong weathering resistance, gloss control, yellowing-resistance, and protection against thermal and light degradation.
    Type: Application
    Filed: May 23, 2019
    Publication date: November 26, 2020
    Inventors: Joseph H. James, Sanjana Das
  • Publication number: 20200239705
    Abstract: An ultraviolet light absorber (UVA) Universal Composition powder coating is provided. The composition can include about 73.0 to about 78.0 weight percent (wt. %) of a silicone resin, about 2.0 to about 7.0 wt. % of a hardener, about 0.7 to about 1.2 wt. % of a UV stabilizer, about 0.7 to about 1.2 wt. % of a flow modifier, about 15.0 to about 20.0 wt. % of a glass flake, and about 0.1 to about 0.6 wt. % of a catalyst. A UVA additive composition including a plurality of UVA additive particles having a continuous phase of a silicon resin that contains a hardener, a UV stabilizer, a flow modifier, glass flakes, and a catalyst, wherein the plurality of UVA additive particles have a particle size of 0.5 to 100 ?m, is also provided.
    Type: Application
    Filed: January 27, 2020
    Publication date: July 30, 2020
    Applicant: PISON IP HOLDCO LLC
    Inventors: Joseph Henry James, Sanjana Das
  • Publication number: 20200199382
    Abstract: A multi-functional flexibility additive that reduces surface imperfections such as orange peel, facilitates lower viscosity during endothermic reactions, provides high flexibility to the final, cured coating, and possesses chemical resistance is contemplated. The additive is formed as a binder system adhered to a resinous flow aid carrier at a preferred weight ratio of 40:60 (binder:carrier).
    Type: Application
    Filed: December 19, 2018
    Publication date: June 25, 2020
    Inventors: Joseph H. James, Subadhra Janardhanan, Sanjana Das, Kathleen McAfee
  • Publication number: 20200199375
    Abstract: A mar and scratch resistant additive that possesses multifunctional and other characteristics is described. The additive comprises a binder system platform that is easily introduced into a wide range of chemical coating platforms. The additive may also be introduced to these coatings by way of a silica carrier to simplify its use.
    Type: Application
    Filed: December 19, 2018
    Publication date: June 25, 2020
    Inventors: Joseph H. James, Subadhra Janardhanan, Sanjana Das, Kathleen McAfee
  • Publication number: 20200199374
    Abstract: A multi-functional flow modifier that also serves as a wetting agent, gloss control additive, and rheology modifier is contemplated. The flow modifier itself is a mixture of polyurethane masterbatch and hydroxyl acrylic resin (free from any styrene components/resins), curatives, anti-corrosion pigments, degassers, and anti-oxidants. The flow modifier may be introduced to finished coating compositions by way of a silica carrier.
    Type: Application
    Filed: December 19, 2018
    Publication date: June 25, 2020
    Inventors: Joseph H. James, Sanjana Das, Suba Stoll, Kate McAfee
  • Publication number: 20200102460
    Abstract: A free-flowing dry mix of various chemical components can be applied in its dried form, as is contemplated by typical powder coating operations, as well as dispersed within a liquid carrier and applied in liquid form. When liquefied, this bifunctional composition retains similar viscosity to liquid coatings, while simultaneously avoiding any reaction with or degradation by the liquid carrier. The liquefied powder is preferable to existing liquid coatings because it avoids the use of any volatile organic compounds or other solvents, whereas the final, cured coating produced by these bifunctional compositions are indistinguishable regardless of whether they are applied in dry or liquefied form.
    Type: Application
    Filed: September 30, 2019
    Publication date: April 2, 2020
    Inventors: Joseph H. James, Sanjana Das