Patents Assigned to Northern Technologies International Corp.
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Patent number: 8557372Abstract: 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: GrantFiled: February 25, 2011Date of Patent: October 15, 2013Assignee: Northern Technologies International Corp.Inventors: Donald Kubik, Barbara Nygaard
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Patent number: 8557373Abstract: 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: GrantFiled: September 28, 2012Date of Patent: October 15, 2013Assignee: Northern Technologies International Corp.Inventors: Donald Kubik, Barbara Nygaard
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Patent number: 8283024Abstract: 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: GrantFiled: December 1, 2010Date of Patent: October 9, 2012Assignee: Northern Technologies International Corp.Inventors: Donald Kubik, Barbara Nygaard
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Publication number: 20110260443Abstract: The present invention generally relates to corrosion management systems designed to deliver corrosion protection and/or the management of corrosion to a connector, a connection, a welded joint, or some other type of interface (e.g., a valve joint used to join to portions of piping). In another embodiment, the present invention relates to systems designed to deliver at least one form of corrosion, UV, salt spray, and/or fire damage protection, mitigation and/or the management to a connector, a connection, a welded joint, or some other type of interface (e.g., a flange used to join to portions of piping).Type: ApplicationFiled: April 25, 2008Publication date: October 27, 2011Applicants: PETROLEO BRASILEIRO S.A., NORTHERN TECHNOLOGIES INTERNATIONAL CORP.Inventors: Efim Ya Lyublinski, Keiji Uemura, Yefim Vaks, Marcelo Schultz
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Patent number: 8008373Abstract: A biodegradable thermoplastic polymer masterbatch composition comprising a blend of at least one biodegradable thermoplastic polymer containing high loading of a particulate filler uniformly dispersed therein. The amount of the biodegradable thermoplastic polymer is generally from about 25% to about 50% by weight and the amount of the filler is from about 75% to about 50% by weight, based upon the total amount of one biodegradable polymer and the at least one filler. The uniform dispersion of the fillers is desirably obtained by adding small particles of the filler to a melt of the biodegradable polymer and blending using high shear equipment with special screw geometry. The masterbatch composition is then physically blended with additional biodegradable thermoplastic polymer and extrusion processed into final articles such as blown and cast films, molded products, and the like.Type: GrantFiled: October 31, 2007Date of Patent: August 30, 2011Assignee: Northern Technologies International Corp.Inventors: Ramani Narayan, Sunder Balakrishnan, Donald A. Kubik, Mehmet A. Gencer
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Patent number: 7794583Abstract: The present invention generally relates to synergistic corrosion management systems designed to deliver two or more different types of corrosion inhibiting compounds (e.g., two or more different types of corrosion inhibiting compounds) to an enclosure, and to method for using same. More specifically, the present invention relates to synergistic corrosion management systems designed to eliminate, manage, control and/or mitigate corrosion in containers, enclosures, cisterns and/or storage tanks (e.g., above ground storage tanks). In one embodiment, the present invention utilizes a combination of at least one cathodic-based corrosion prevention or mitigation system, at least one soluble corrosion inhibitor, and at least one volatile or vapor phase corrosion inhibitor.Type: GrantFiled: April 5, 2007Date of Patent: September 14, 2010Assignee: Northern Technologies International Corp.Inventor: Efim Ya Lyublinski
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Publication number: 20100209289Abstract: 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: ApplicationFiled: April 25, 2008Publication date: August 19, 2010Applicant: NORTHERN TECHNOLOGIES INTERNATIONAL CORP.Inventors: Efim Ya Lyublinski, Yefim Vaks
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Patent number: 7270775Abstract: An effective corrosion inhibiting polymer composition including an interceptor for an acid gas combined with known VCI ingredients produces a more effective VCI than the prior art composition. The composition in macrogranular form may be held in a receptacle which is sealed in a container in which ferrous articles are protected. When the composition, greatly diluted is injection- or blow-molded or extruded as film which contains more than 100 ppm of a 2,4-6-tri-substituted phenol and uniformly dispersed small amounts of solid micron-sized particles of interceptor, an alkali metal nitrite and a solid adjuvant to aid in dispersing the solid particles, the film is transparent and has a smooth surface.Type: GrantFiled: October 1, 2003Date of Patent: September 18, 2007Assignee: Northern Technologies International Corp.Inventors: Donald Alfons Kubik, Boris Varshal, Efim Ya Lyublinski, Barbara Ann Nygaard
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Patent number: 7261839Abstract: An effective tarnish inhibiting (“TI”) polymer composition including a scavenger for hydrogen sulfide optionally in the presence of an acid gas such as sulfur dioxide, provides excellent protection against tarnishing of the lustrous surfaces of a silver object. When the composition is thermoformed into a box-like container or extruded as film which contains uniformly dispersed solid micron-sized particles of the scavenger chosen from zinc oxide and a silicate of an alkali metal in an amount no greater than 5% by weight of the polymer, it is transparent so that the condition of the stored silver may be assessed. A solid inert adjuvant may be added. All solid particles in the material have a primary particle size smaller than 53 ?m which makes it possible to obtain the uniform dispersion. A silver object may be wrapped in the film, or stored in a sealed box so that the solid particles in the polymer are not coated on the surfaces of the silver object.Type: GrantFiled: October 1, 2003Date of Patent: August 28, 2007Assignee: Northern Technologies International Corp.Inventors: Donald Alfons Kubik, Boris Varshal, Efim Ya. Lyublinski, Barbara Ann Nygaard