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).
-
Patent number: 11970817Abstract: 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: GrantFiled: May 27, 2022Date of Patent: April 30, 2024Assignee: FIBERLEAN TECHNOLOGIES LIMITEDInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
-
Patent number: 11732411Abstract: 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: GrantFiled: October 1, 2021Date of Patent: August 22, 2023Assignee: FiberLean Technologies LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi
-
Publication number: 20230138194Abstract: 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: ApplicationFiled: December 27, 2022Publication date: May 4, 2023Applicant: FiberLean Technologies LimitedInventors: Tafadzwa Motsi, David Robert Skuse, Jean Andre Alary, Andreas Borger, Neil Rowson, Thomas Richard Skuse
-
Patent number: 11572658Abstract: 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: GrantFiled: January 16, 2020Date of Patent: February 7, 2023Assignee: FIBERLEAN TECHNOLOGIES LIMITEDInventors: Tafadzwa Motsi, David Robert Skuse, Jean Andre Alary, Andreas Borger, Neil Rowson, Thomas Richard Skuse
-
Publication number: 20220364305Abstract: 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: ApplicationFiled: May 27, 2022Publication date: November 17, 2022Applicant: FiberLean Technologies LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
-
Patent number: 11377791Abstract: 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: GrantFiled: August 30, 2018Date of Patent: July 5, 2022Assignee: FiberLean Technologies LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
-
Patent number: 11242651Abstract: 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: GrantFiled: April 20, 2018Date of Patent: February 8, 2022Assignee: FiberLean Technologies LimitedInventors: Mark Windebank, David Skuse, Tafadzwa Motsi, Guillaume Tellier
-
Publication number: 20220018068Abstract: 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: ApplicationFiled: October 1, 2021Publication date: January 20, 2022Applicant: FiberLean Technologies LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi
-
Patent number: 11162219Abstract: 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: GrantFiled: August 30, 2018Date of Patent: November 2, 2021Assignee: FiberLean Technologies LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi
-
Publication number: 20200263358Abstract: 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: ApplicationFiled: April 20, 2018Publication date: August 20, 2020Applicant: FIBERLEAN TECHNOLOGIES LIMITEDInventors: Mark WINDEBANK, David SKUSE, Tafadzwa MOTSI, Guillaume TELLIER
-
Publication number: 20200217014Abstract: 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: ApplicationFiled: January 16, 2020Publication date: July 9, 2020Inventors: Tafadzwa Motsi, David Robert Skuse, Jean Andre Alary, Andreas Borger, Neil Rowson, Thomas Richard Skuse
-
Publication number: 20190078257Abstract: 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: ApplicationFiled: August 30, 2018Publication date: March 14, 2019Applicant: FiberLean Technologies LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi
-
Publication number: 20180371694Abstract: 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: ApplicationFiled: August 30, 2018Publication date: December 27, 2018Applicant: FiberLean Technologies LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
-
Patent number: 10100464Abstract: 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: GrantFiled: September 2, 2015Date of Patent: October 16, 2018Assignee: FiberLean Technologies LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
-
Publication number: 20170145635Abstract: 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: ApplicationFiled: May 14, 2015Publication date: May 25, 2017Inventors: Tafadzwa Motsi, David Robert Skuse, Jean Andre Alary, Andreas Borger, Neil Rowson, Thomas Richard Skuse
-
Publication number: 20160053437Abstract: 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: ApplicationFiled: September 2, 2015Publication date: February 25, 2016Applicant: IMERYS MINERALS, LIMITEDInventors: JOHN CLAUDE HUSBAND, PER SVENDING, DAVID ROBERT SKUSE, TAFADZWA MOTSI, MIKKO LIKITALO, ALAN COLES
-
Patent number: 9127405Abstract: 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: GrantFiled: May 17, 2010Date of Patent: September 8, 2015Assignee: Imerys Minerals, LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
-
Patent number: 8231764Abstract: 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: GrantFiled: September 26, 2011Date of Patent: July 31, 2012Assignee: Imerys Minerals, LimitedInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
-
Publication number: 20120012031Abstract: 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: ApplicationFiled: September 26, 2011Publication date: January 19, 2012Inventors: JOHN CLAUDE HUSBAND, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles
-
Publication number: 20110259537Abstract: 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: ApplicationFiled: May 17, 2010Publication date: October 27, 2011Applicant: IMERYS MINERALS LIMITEDInventors: John Claude Husband, Per Svending, David Robert Skuse, Tafadzwa Motsi, Mikko Likitalo, Alan Coles