Abstract: The present invention relates to functionalized copolymers of isoolefins and olefinic monomers, particularly to azidated copolymers. The present invention also relates to methods of preparing such azidated copolymers. The functionalized copolymers are used in various technology areas such as surface modification, adhesion, drug delivery, compatibilization of polymer blends or motor oil and fuel additives, and in providing clean cured products without contaminant leaching and/or side products.
Type:
Grant
Filed:
December 21, 2012
Date of Patent:
October 17, 2017
Assignees:
ARLANXEO Deutschland GmbH, The University of Waterloo
Inventors:
Conrad Siegers, Dana Adkinson, Gregory J. E. Davidson, Lorenzo Ferrari, Mario Gauthier
Abstract: A multi-slot patch antenna is provided. The multi-slot patch antenna includes a central patch including cut corners; a plurality of strips of varying widths, the plurality of strips surrounding the central patch; and a plurality of slots of varying widths, the plurality of slots being positioned between each of the plurality of strips, wherein one of the plurality of slots is positioned between a first one of the plurality of strips and the central patch.
Type:
Grant
Filed:
April 14, 2016
Date of Patent:
October 17, 2017
Assignees:
GM GLOBAL TECHNOLOGY OPERATIONS LLC, UNIVERSITY OF WATERLOO
Inventors:
Vyacheslav Berezin, Shaun S. Marshall, Gholamreza Z. Rafi, Safieddin Safavi-Naeini
Abstract: The present invention provides a novel process for subjecting a diene-based-polymer to a metathesis reaction in a first step and a selective hydrogenation of the carbon-carbon double bonds present in such diene-based polymers in a second step using a ruthenium or osmium based complex catalyst, wherein the diene-based polymer is present in latex form, this means as a suspension of diene-based polymer particles in an aqueous medium.
Type:
Grant
Filed:
June 21, 2013
Date of Patent:
August 15, 2017
Assignee:
University of Waterloo
Inventors:
Garry L. Rempel, Qinmin Pan, Yin Liu, Jialong Wu
Abstract: The present invention provides a novel process for selectively hydrogenating the carbon-carbon double bonds in diene-based polymers which are present in latex form, this means as a suspension of diene-based polymer particles in an aqueous medium, using a Ruthenium or Osmium-based complex catalyst without any organic solvent.
Type:
Grant
Filed:
June 21, 2013
Date of Patent:
May 23, 2017
Assignee:
University of Waterloo
Inventors:
Garry L. Rempel, Qinmin Pan, Yin Liu, Jialong Wu
Abstract: The present invention relates to curing of polymers, particularly to self curing of polymers. The present invention provides a process for curing of copolymers of isoolefins and olefinic monomers. The process includes the step of reacting the copolymer with an azidation reagent to form an azidated copolymer and then heating the azidated copolymer at a suitable temperature to cure the polymer.
Type:
Grant
Filed:
December 21, 2012
Date of Patent:
January 10, 2017
Assignees:
LANXESS INTERNATIONAL SA, UNIVERSITY OF WATERLOO
Inventors:
Conrad Siegers, Dana Adkinson, Gregory J. E. Davidson, Lorenzo Ferrari, Mario Gauthier
Abstract: There is provided a multi-layer flat panel detector comprising a first conversion layer, a second conversion layer, at least one printed circuit board for receiving signals generated by the first or second direct conversion layers, and a processor for processing the signals to produce an image being generated.
Abstract: The present invention refers to diene-based unsaturated polymer latex particles having a particle size measured as d90-value of less than 60 nm and a method for their production. Methods for using the diene-based polymer latex as rubber and for conversion to hydrogenated polymers, with reduced gel formation, are also disclosed.
Type:
Grant
Filed:
August 26, 2010
Date of Patent:
June 7, 2016
Assignee:
University of Waterloo
Inventors:
Qinmin Pan, Garry L. Rempel, Guangwei He
Abstract: The present invention relates to methods for determining the level of intermolecular interaction of a polymer based on the fraction of intermolecular interaction (finter) relative to the inter, total molecular interaction, which includes both intermolecular and intramolecular interactions. Further provided herein is a method of identifying a suitable viscosity index improver based on the value of finter. The identified suitable viscosity index improver can be used in a lubricating oil composition for, e.g., a power transmission system.
Type:
Grant
Filed:
September 15, 2015
Date of Patent:
May 31, 2016
Assignees:
Afron Chemical Corporation, University of Waterloo
Inventors:
Sheng Jiang, Akhilesh Duggal, Jean Duhamel, Solmaz Pirouz
Abstract: The present invention relates to methods for determining the level of intermolecular interaction of a polymer based on the fraction of intermolecular interaction (finter) relative to the inter, total molecular interaction, which includes both intermolecular and intramolecular interactions. Further provided herein is a method of identifying a suitable viscosity index improver based on the value of finter. The identified suitable viscosity index improver can be used in a lubricating oil composition for, e.g., a power transmission system.
Type:
Application
Filed:
September 15, 2015
Publication date:
March 17, 2016
Applicants:
Afton Chemical Corporation, University of Waterloo
Inventors:
Sheng Jiang, Akhilesh Duggal, Jean Duhamel, Solmaz Pirouz
Abstract: The present invention provides a novel process for selectively hydrogenating the carbon-carbon double bonds in diene-based polymers which are present in latex form, this means as a suspension of diene-based polymer particles in an aqueous medium, using a Ruthenium or Osmium-based complex catalyst without any organic solvent.
Type:
Application
Filed:
June 21, 2013
Publication date:
July 2, 2015
Applicant:
UNIVERSITY OF WATERLOO
Inventors:
Garry L. Rempel, Qinmin Pan, Yin Liu, Jialong Wu
Abstract: A method and system for predicting channel fading, particularly in a mobile wireless environment, that is accurate for long-range predictions. The method comprises estimating a model parameters based on a current channel estimate, and recursively adapting the model parameters to predict future channel fading coefficients until a predetermined re-acquisition condition is satisfied. Once the re-acquisition condition has been satisfied, the model parameters are again estimated based on a current channel estimate. The acquired model parameters are adaptively updated and used in a Kalman filter.
Type:
Application
Filed:
July 26, 2012
Publication date:
November 29, 2012
Applicants:
UNIVERSITY OF WATERLOO, BCE INC.
Inventors:
Abdorreza HEIDARI, Amir K. KHANDANI, Derek MCAVOY
Abstract: The present invention relates to diene-based hydrogenated polymer latex particles having a particle size measured as d90 value of less than 60 nm and a method for their production and their use. The nanosized hydrogenated diene-based polymers obtained show improved properties, especially with respect to resistance to degradation by heat, oxygen and ozone.
Abstract: The present invention refers to diene-based unsaturated polymer latex particles having a particle size measured as d90-value of less than 60 nm and a method for their production. Methods for using the diene-based polymer latex as rubber and for conversion to hydrogenated polymers, with reduced gel formation, are also disclosed.
Type:
Application
Filed:
August 26, 2010
Publication date:
October 25, 2012
Applicant:
UNIVERSITY OF WATERLOO
Inventors:
Qinmin Pan, Garry L. Rempel, Guangwei He
Abstract: A method and system for predicting channel fading, particularly in a mobile wireless environment, that is accurate for long-range predictions. The method comprises estimating a model parameters based on a current channel estimate, and recursively adapting the model parameters to predict future channel fading coefficients until a predetermined re-acquisition condition is satisfied. Once the re-acquisition condition has been satisfied, the model parameters are again estimated based on a current channel estimate. The acquired model parameters are adaptively updated and used in a Kalman filter.
Type:
Grant
Filed:
March 30, 2007
Date of Patent:
July 31, 2012
Assignees:
BCE Inc., University of Waterloo
Inventors:
Abdorreza Heidari, Amir Keyvan Khandani, Derek McAvoy
Abstract: Various implementations of an interface device, along with associated methods and systems, are described in which the interface device has a housing with a transformable form factor, and a transformation assembly that can change the form factor of the housing. At least one of the form factors of the housing has a shape that corresponds to data associated with the interface device.
Abstract: An electrode material having carbon and sulfur is provided. The carbon is in the form of a porous matrix having nanoporosity and the sulfur is sorbed into the nanoporosity of the carbon matrix. The carbon matrix can have a volume of nanoporosity between 10 and 99%. In addition, the sulfur can occupy between 5 to 99% of the nanoporosity. A portion of the carbon structure that is only partially filled with the sulfur remains vacant allowing electrolyte egress. In some instances, the nanoporosity has nanopores and nanochannels with an average diameter between 1 nanometer and 999 nanometers. The sulfur is sorbed into the nanoporosity using liquid transport or other mechanisms providing a material having intimate contact between the electronically conductive carbon structure and the electroactive sulfur.
Type:
Grant
Filed:
June 11, 2008
Date of Patent:
May 8, 2012
Assignees:
Toyota Motor Engineering & Manufacturing North America, Inc., University of Waterloo
Inventors:
Kimber L. Stamm, Monique N. Richard, Linda F. Nazar, Xiulei Ji, Kyu-Tae Lee
Abstract: The present invention refers to diene-based unsaturated polymer latex particles having a particle size measured as d90-value of less than 60 nm and a method for their production.
Type:
Application
Filed:
August 24, 2010
Publication date:
July 28, 2011
Applicant:
UNIVERSITY OF WATERLOO
Inventors:
Qinmin Pan, Garry L. Rempel, Guangwei He
Abstract: A method and system for detecting and decoding multiple signals. A low-complexity MIMO detector that combines sphere decoding and m-algorithm approaches, while accounting for the effect of channel condition on the decoding operation, is provided. Taking into account the channel condition effectively controls the size of the search tree, and consequently the search complexity, in an adaptive manner. The channel condition is exploited in the construction of the tree to manage the number of branches in the tree and to avoid undesirable growth.
Type:
Grant
Filed:
March 30, 2007
Date of Patent:
July 26, 2011
Assignees:
BCE Inc., University of Waterloo
Inventors:
Hosein Nikopour-Deilami, Amir Keyvan Khandani, Aladdin Saleh
Abstract: A method of measuring a temperature of a wire and a current flowing through the wire with a thermocouple includes taking a first voltage reading from the thermocouple with the current at a first polarity, and taking a second voltage reading from the thermocouple with the current at a second polarity. The first voltage reading is averaged with the second voltage reading to obtain an average voltage reading, which is referenced to a correlation table to calculate the temperature of the wire. Half of a voltage difference between the first voltage reading and the second voltage reading is divided by the resistance in the wire to calculate the current flowing through the wire.
Type:
Application
Filed:
December 18, 2009
Publication date:
June 23, 2011
Applicants:
GM GLOBAL TECHNOLOGY OPERATIONS, INC, University of Waterloo
Inventors:
Xiujie Gao, Nicholas William Pinto, Robert B. Gorbet, J. Richard Culham, Alan L. Browne, Nancy L. Johnson, Huilong (William) Ma