Patents Assigned to Northern Technologies International Corporation
  • Patent number: 11939423
    Abstract: A breathable biodegradable volatile corrosion inhibitor polyester composition comprises one or more biodegradable homopolymer polyesters and/or one or more biodegradable random copolymer polyesters, one or more volatile corrosion inhibitors (VCI), and one or more fillers wherein said composition has a higher water-vapor transmission rate than polyethylene.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: March 26, 2024
    Assignee: Northern Technologies International Corporation
    Inventors: Mahin Shahlari, Ik-Hau Ng
  • Patent number: 11905407
    Abstract: Polylactide (PLA) parts can be crystallized via two procedures. In the first procedure, i.e. a 2-step post-mold annealing process, the complete crystallization of PLA parts can be done after molding in a secondary operation called as post-mold annealing to make higher heat-resistant PLA parts. There are limitations to this 2-step operation, namely, a) warpage of parts with complex geometries, and b) scaling up higher production volume times. In the second procedure, i.e. 1-step in-mold annealing process, the complete crystallization of PLA parts can be done in the mold itself by holding the temperature of the mold at the crystallization temperature of PLA which is about 100° C. The 1-step in-mold annealing process using a masterbatch blended with neat PLA results in a highly crystalline article produced in a significantly lower cycle time.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: February 20, 2024
    Assignee: Northern Technologies International Corporation
    Inventors: Shilpa Manjure, Nagaraj Kuppusamy, Matthew Lundblad
  • Patent number: 11485852
    Abstract: The notched Izod impact toughness and tensile elongation of poly(lactic acid) (PLA)-homopolymers are increased by about 2 to about 4 times by blending therewith a PLA-copolymer having a difunctional flexible middle segment such as a polysiloxane or a polyether from about 0.6 wt. % to about 20 wt. %. The PLA-homopolymer-PLA-copolymer blend having a difunctional flexible polymer from about 0.5 wt. % to about 10 wt. % is thermally annealed to provide impact toughness of at least about 5 kJ/m2 and tensile elongation of greater than 12%. This exceptional improvement observed in the PLA blend is a synergistic effect of the addition of the difunctional flexible polymer of the copolymer and thermal annealing. The improvement observed in the mechanical properties with high PLA homopolymer content above about 90 to about 98 wt. % is unusual and results in an increased scope of molding and thermoforming applications.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: November 1, 2022
    Assignee: Northern Technologies International Corporation
    Inventors: Preetam Giri, Shilpa Manjure, Sayli Bote
  • Patent number: 11198798
    Abstract: Self-fusing silicone tapes contain neutral corrosion inhibitors therein such as salts of acids. Such tapes provide protection in an acid gas environment as well as under thermal insulation. The same also allows inspection of protected structure without removing the protection apparatus.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: December 14, 2021
    Assignee: Northern Technologies International Corporation
    Inventors: Terry Alan Natale, Ronnie do Amaral Singh, Edwardo Yoshihiro Tanabe
  • Patent number: 9656201
    Abstract: A smart enclosure protection system for packages containing one or more metals comprises various sensors such as relative humidity, temperature of the metal, temperature within the package, a volatile corrosion inhibitor sensor, as well as a relative humidity sensor. Upon a computer receiving a signal from one or more of the noted sensors that the sensing item is either above or below a predetermined value, it will send a signal to one or more dispensers such as a dehumidifying compound dispenser, a volatile corrosion inhibitor compound dispenser, a soluble corrosion inhibitor compound dispenser, or a chemical fluid absorber or scavenger dispenser to dispense one or more such dispensing compounds that abates or removes an actual or a potential corrosion inhibiting situation.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: May 23, 2017
    Assignee: Northern Technologies International Corporation
    Inventors: Mehmet A. Gencer, Efim Ya Lyublinski
  • Patent number: 9556635
    Abstract: A system for protecting storage tank soil side bottoms against corrosion includes a pipe system comprising non-perforated inlet pipes and perforated pipes connected thereto. A sleeve container having solid VCI compounds therein is inserted into the perforated pipes. The sleeves are permeable to vapors emitted by the solid VCI compounds and flow through the pipe to a perforation where they are admitted into an area beneath a storage tank so that they can contact the tank bottom (soil side) and protect the same from corrosion. Alternatively, solid SCI compounds can be used in combination with VCI compounds. The corrosion protection system is designed to be used with aboveground storage tanks. This includes, but is not limited to, single bottom tanks: newly installed or existing tanks undergoing bottom replacement or installation of double bottoms.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: January 31, 2017
    Assignee: Northern Technologies International Corporation
    Inventors: Efim Ya Lyublinski, Gautam Ramdas, Yefim Vaks, Terry Alan Natale, Monique Humbert Posner, Kelly M. Baker, Alexander Roytman
  • Patent number: 9303380
    Abstract: A method and apparatus for the corrosion protection of tank soil side bottoms is achieved by providing equipment to an existing storage tank as by installing a chime delivery system about the perimeter of the storage tank bottom plate, and introducing an appropriate amount of a corrosion inhibitor into the chime delivery system, whereby the corrosion inhibitor is readily admitted into the spaces between the substrate and the tank bottom plate. The system avoids any refurbishment of the tank and allows for easy introduction and replenishment of inhibitor without interruption of tank operations. The system also does not require any renovation of the tank, and does not require any replacement of the tank bottom plate panels.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: April 5, 2016
    Assignee: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
    Inventors: Efim Ya Lyublinski, Gautam Ramdas, Yefim Vaks, Terry Alan Natale, Monique Humbert Posner, Kelly Baker, Alexander Roytman
  • Patent number: 9169720
    Abstract: Corrosion management systems protecting against or managing corrosion of various components in generally vertically oriented structures, that can be located one or more of aboveground and underground. The corrosion management system includes a dispenser system that dispenses at least one corrosion inhibitor to the structure desired to be protected at a plurality of different vertical heights.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: October 27, 2015
    Assignee: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
    Inventors: Efim Ya Lyublinski, Yefim Vaks
  • Patent number: 8720390
    Abstract: Hydrogen is produced from methanol and water under supercritical temperature and pressure conditions desirably without any catalyst. The hydrogen can be produced in situ on an internal combustion engine using a heat source such as the exhaust system of the internal combustion engine to achieve the supercritical temperature.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: May 13, 2014
    Assignee: Northern Technologies International Corporation
    Inventor: Sunggyu Lee
  • Publication number: 20130186617
    Abstract: Corrosion management systems protecting against or managing corrosion of various components in generally vertically oriented structures, that can be located one or more of aboveground and underground. The corrosion management system includes a dispenser system that dispenses at least one corrosion inhibitor to the structure desired to be protected at a plurality of different vertical heights.
    Type: Application
    Filed: March 8, 2013
    Publication date: July 25, 2013
    Applicant: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
    Inventor: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
  • Patent number: 8418757
    Abstract: Corrosion management systems protecting against or managing corrosion of various components in generally vertically oriented structures, that can he located one or more of aboveground and underground. The corrosion management system includes a dispenser system that dispenses at least one corrosion inhibitor to the structure desired to be protected at a plurality of different vertical heights.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: April 16, 2013
    Assignee: Northern Technologies International Corporation
    Inventors: Efim Ya Lyublinski, Yefim Vaks
  • Publication number: 20130071317
    Abstract: Hydrogen is produced from methanol and water under supercritical temperature and pressure conditions desirably without any catalyst. The hydrogen can be produced in situ on an internal combustion engine using a heat source such as the exhaust system of the internal combustion engine to achieve the supercritical temperature.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 21, 2013
    Applicant: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
    Inventor: Sunggyu Lee
  • Patent number: 8377531
    Abstract: The present invention relates to methods for preventing and/or reducing the occurrence of corrosion in a variety of articles including, but not limited to, tanks (e.g., storage tanks, septic tanks, fuel tanks, etc.); containers (e.g., shipping containers, storage containers, etc.); semi-closed systems (e.g., fuel systems, septic systems, reservoirs, etc.); and/or closed systems (e.g., waste disposal systems, waste disposal drums or containers, etc.). In another embodiment, the methods of the present invention may be utilized to reduce and/or prevent corrosion in a variety of pipelines (e.g., gas/oil pipelines, water pipelines, sewage lines, etc.). More specifically, the present invention relates to methods for preventing and/or reducing the occurrence of corrosion in a variety of articles including, but not limited to, metallic tanks; metallic containers; pipelines; semi-closed systems; and/or closed systems which are constructed partially or totally from metal. (e.g.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: February 19, 2013
    Assignee: Northern Technologies International Corporation
    Inventors: Efim Ya Lyublinski, Donald A Kubik
  • Publication number: 20130029120
    Abstract: A corrosive gas resistant laminate comprises an outer polymer layer desirably containing a volatile corrosion inhibitor therein, a corrosion gas resistant barrier layer that can be a hydrophilic polymer, and a tie layer located between said outer and said barrier layers. The various laminates have improved transmission resistance with regard to corrosive gases such as oxygen, hydrogen sulfide, and halogen gases such as chlorine. The laminates can be used to protect metal during storage and transit.
    Type: Application
    Filed: September 28, 2012
    Publication date: January 31, 2013
    Applicant: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
    Inventor: NORTHERN TECHNOLOGIES INTERNATIONAL
  • Patent number: 8354072
    Abstract: The present invention generally relates to corrosion management systems designed to deliver corrosion protection and/or the management of corrosion to a top portion of an enclosure (e.g., storage tanks, cisterns, containers, etc.). In one embodiment, the present invention relates to corrosion management systems designed to deliver corrosion protection and/or the management of corrosion to a top portion, or roof portion, of an enclosure where such a system includes one or more dispensers designed to deliver at least one corrosion inhibitor to a system designed to protect a top portion of an enclosure (e.g., storage tanks, cisterns, containers, etc.).
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: January 15, 2013
    Assignee: Northern Technologies International Corporation
    Inventors: Efim Ya Lyublinski, Yefim Vaks
  • Publication number: 20120294768
    Abstract: The present invention generally relates to corrosion management systems designed to deliver corrosion protection and/or the management of corrosion to a top portion of an enclosure (e.g., storage tanks, cisterns, containers, etc.). In one embodiment, the present invention relates to corrosion management systems designed to deliver corrosion protection and/or the management of corrosion to a top portion, or roof portion, of an enclosure where such a system includes one or more dispensers designed to deliver at least one corrosion inhibitor to a system designed to protect a top portion of an enclosure (e.g., storage tanks, cisterns, containers, etc.).
    Type: Application
    Filed: July 30, 2012
    Publication date: November 22, 2012
    Applicant: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
    Inventors: EFIM YA LYUBLINSKI, YEFIM VAKS
  • Patent number: 8309021
    Abstract: The present invention generally relates to corrosion management systems designed to deliver corrosion protection and/or the management of corrosion to a top portion of an enclosure (e.g., storage tanks, cisterns, containers, etc.). In one embodiment, the present invention relates to corrosion management systems designed to deliver corrosion protection and/or the management of corrosion to a top portion, or roof portion, of an enclosure where such a system includes one or more dispensers designed to deliver at least one corrosion inhibitor to a system designed to protect a top portion of an enclosure (e.g., storage tanks, cisterns, containers, etc.).
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: November 13, 2012
    Assignee: Northern Technologies International Corporation
    Inventors: Efim Ya Lyublinski, Yefim Vaks
  • Publication number: 20120275951
    Abstract: The present invention generally relates to portable systems designed to deliver one or more corrosion inhibiting compounds to an enclosure, and to method for using same. More specifically, the present invention relates to portable, mobile, self-contained and/or discrete systems designed to deliver one or more corrosion inhibiting compounds to an enclosure while simultaneously purging and/or recycling the interior atmosphere of such an enclosure, and to methods for using same. In another embodiment, the present invention relates to portable systems designed to deliver one or more corrosion inhibiting compounds to an enclosure while simultaneously dehumidifying, purging and/or recycling the interior atmosphere of such an enclosure, and to methods for using same. Another aspect of the present invention is that the recycled atmosphere of the enclosure can be passed through an absorbent that removes and/or collects the volatilized metal corrosion inhibitor compound.
    Type: Application
    Filed: June 13, 2012
    Publication date: November 1, 2012
    Applicant: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
    Inventors: Efim Ya Lyublinski, Yefim Vaks
  • Publication number: 20120141642
    Abstract: An all-purpose plastic laminate or wrap as for preserving food that resists penetration of fluids such as water and gases such as oxygen, hydrogen sulfide, sulfur dioxide, and the like. The laminate includes many different embodiments such as at least one hydrophobic outer layer that is free of any volatile corrosion inhibitors, at least one gas resistant barrier layer that can be a hydrophilic polymer, and at least one hydrophobic inner layer that contains a desired additive such as a food safe preservative or antioxidant therein. Optionally at least one tie layer is located between the outer and/or inner layer and said fluid resistant barrier layer. The laminate when applied as a wrap to a food item provides synergistic protection against fluid penetration.
    Type: Application
    Filed: February 25, 2011
    Publication date: June 7, 2012
    Applicant: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
    Inventors: Donald Kubik, Barbara Nygaard
  • Publication number: 20120141754
    Abstract: A corrosive gas resistant laminate comprises an outer polymer layer desirably containing a volatile corrosion inhibitor therein, a corrosion gas resistant barrier layer that can be a hydrophilic polymer, and a tie layer located between said outer and said barrier layers. The various laminates have improved transmission resistance with regard to corrosive gases such as oxygen, hydrogen sulfide, and halogen gases such as chlorine. The laminates can be used to protect metal during storage and transit.
    Type: Application
    Filed: December 1, 2010
    Publication date: June 7, 2012
    Applicant: NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION
    Inventors: Donald Kubik, Barbara Nygaard