Patents by Inventor Tafadzwa Motsi

Tafadzwa Motsi 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: 20200263358
    Abstract: Methods of re-dispersing and de-agglomerating dewatered, partially dried and dried compositions of microfibrillated cellulose and compositions of microfibrillated cellulose and inorganic particulate material, into liquid compositions comprising same, by applying ultrasonic energy to such liquid compositions of dewatered, partially dried and dried compositions of microfibrillated cellulose, or compositions of microfibrillated cellulose and inorganic particulate material. Methods for preparing an aqueous suspension comprising microfibrillated cellulose and, optionally, inorganic particulate material, with enhanced viscosity and tensile strength properties, suitable for use in methods of making paper or coating paper, and to filled and coated papers made from such aqueous suspensions.
    Type: Application
    Filed: April 20, 2018
    Publication date: August 20, 2020
    Applicant: FIBERLEAN TECHNOLOGIES LIMITED
    Inventors: Mark WINDEBANK, David SKUSE, Tafadzwa MOTSI, Guillaume TELLIER
  • Publication number: 20200217014
    Abstract: A method for manufacturing microfibrillated cellulose, a particulate grinding medium suitable for use in said method, a material which wears rough, and a method for making said particulate grinding medium.
    Type: Application
    Filed: January 16, 2020
    Publication date: July 9, 2020
    Inventors: Tafadzwa Motsi, David Robert Skuse, Jean Andre Alary, Andreas Borger, Neil Rowson, Thomas Richard Skuse
  • Publication number: 20190078257
    Abstract: Methods of preparing partially dried or essentially completely dried compositions comprising microfibrillated cellulose and an inorganic particulate material may include microfibrillating a fibrous substrate comprising cellulose in an aqueous environment by grinding in the presence of an inorganic particulate material to form an aqueous composition comprising microfibrillated cellulose and inorganic particulate material, wherein the fibrous substrate comprising cellulose has a Canadian Standard freeness equal to or less than 450 cm, wherein the fibrous substrate to the inorganic particulate material are in a ratio of about 99.5:0.5 to about 0.5:99.
    Type: Application
    Filed: August 30, 2018
    Publication date: March 14, 2019
    Applicant: FiberLean Technologies Limited
    Inventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi
  • Publication number: 20180371694
    Abstract: A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.
    Type: Application
    Filed: August 30, 2018
    Publication date: December 27, 2018
    Applicant: FiberLean Technologies Limited
    Inventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
  • Patent number: 10100464
    Abstract: A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 700 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium which is to be removed after completion of grinding. The grinding may be carried out in the absence of grindable inorganic particulate material, wherein the grinding medium is present in an amount of at least about 10% by volume of the aqueous environment, and wherein the microfibrillated cellulose has a fiber steepness of from about 20 to about 50.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: October 16, 2018
    Assignee: FiberLean Technologies Limited
    Inventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
  • Publication number: 20170145635
    Abstract: A method for manufacturing microfibrillated cellulose, a particulate grinding medium suitable for use in said method, a material which wears rough, and a method for making said particulate grinding medium.
    Type: Application
    Filed: May 14, 2015
    Publication date: May 25, 2017
    Inventors: Tafadzwa Motsi, David Robert Skuse, Jean Andre Alary, Andreas Borger, Neil Rowson, Thomas Richard Skuse
  • Publication number: 20160053437
    Abstract: A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 700 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium which is to be removed after completion of grinding. The grinding may be carried out in the absence of grindable inorganic particulate material, wherein the grinding medium is present in an amount of at least about 10% by volume of the aqueous environment, and wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50.
    Type: Application
    Filed: September 2, 2015
    Publication date: February 25, 2016
    Applicant: IMERYS MINERALS, LIMITED
    Inventors: JOHN CLAUDE HUSBAND, PER SVENDING, DAVID ROBERT SKUSE, TAFADZWA MOTSI, MIKKO LIKITALO, ALAN COLES
  • Patent number: 9127405
    Abstract: A method for preparing an aqueous suspension comprising microfibrillated cellulose and inorganic particulate material, the method comprising a step of microfibrillating a fibrous substrate comprising cellulose in an aqueous environment in the presence of an inorganic particulate material.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: September 8, 2015
    Assignee: Imerys Minerals, Limited
    Inventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
  • Patent number: 8231764
    Abstract: A method for preparing an aqueous suspension comprising microfibrillated cellulose and inorganic particulate material, the method comprising a step of microfibrillating a fibrous substrate comprising cellulose in an aqueous environment in the presence of an inorganic particulate material.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: July 31, 2012
    Assignee: Imerys Minerals, Limited
    Inventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
  • Publication number: 20120012031
    Abstract: A method for preparing an aqueous suspension comprising microfibrillated cellulose and inorganic particulate material, the method comprising a step of microfibrillating a fibrous substrate comprising cellulose in an aqueous environment in the presence of an inorganic particulate material.
    Type: Application
    Filed: September 26, 2011
    Publication date: January 19, 2012
    Inventors: JOHN CLAUDE HUSBAND, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
  • Publication number: 20110259537
    Abstract: A method for preparing an aqueous suspension comprising microfibrillated cellulose and inorganic particulate material, the method comprising a step of microfibrillating a fibrous substrate comprising cellulose in an aqueous environment in the presence of an inorganic particulate material.
    Type: Application
    Filed: May 17, 2010
    Publication date: October 27, 2011
    Applicant: IMERYS MINERALS LIMITED
    Inventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles