Patents by Inventor Brian Stanley Hawkett
Brian Stanley Hawkett 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).
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Patent number: 8765183Abstract: The present invention relates to polymer microgel beads having a polymeric matrix with nanomagnetic particles dispersed substantially uniformly therethrough, wherein a steric stabiliser is associated with the particles, the steric stabiliser being a polymeric material that (i) does not form part of the polymeric matrix of the beads, and (ii) comprises a steric stabilising polymeric segment and an anchoring polymeric segment, wherein the steric stabilising polymeric segment is different from the anchoring polymeric segment, and wherein the anchoring polymeric segment has an affinity toward the surface of the nanomagnetic particles and secures the stabiliser to the particles.Type: GrantFiled: May 15, 2009Date of Patent: July 1, 2014Assignee: The University of SydneyInventors: Brian Stanley Hawkett, Nirmesh Jain
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Patent number: 8709486Abstract: The present invention relates to a composition suitable for administration to a subject, the composition comprising pharmacologically acceptable particulate material dispersed throughout a pharmacologically acceptable liquid carrier, the particulate material being maintained in the dispersed state by a steric stabilizer, wherein the steric stabilizer is a polymeric material comprising a steric stabilizing polymeric segment and an anchoring polymeric segment, one or both of which are derived from one or more ethylenically unsaturated monomers that have been polymerized by a living polymerization technique, wherein the steric stabilizing polymeric segment is different from the anchoring polymeric segment, and wherein the anchoring polymeric segment has an affinity toward the surface of the particulate material and secures the stabilizer to the particulate material.Type: GrantFiled: May 15, 2009Date of Patent: April 29, 2014Assignee: The University of SydneyInventors: Brian Stanley Hawkett, Nirmesh Jain, Thi Thuy Binh Pham, Yanjun Wang, Gregory Goodman Warr
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Publication number: 20120128743Abstract: The present invention relates to a method of forming polymer on the surface of polymer particles, the method comprising: (i) providing a dispersion comprising a continuous aqueous phase, a dispersed organic phase comprising one or more ethylenically unsaturated monomers, and a RAFT agent as a stabiliser for said organic phase; (ii) polymerising the one or more ethylenically unsaturated monomers under the control of the RAFT agent to form an aqueous dispersion of seed polymer particles; (iii) crosslinking the seed polymer particles; (iv) swelling the crosslinked seed particles with one or more ethylenically unsaturated monomers to form an aqueous dispersion of monomer swollen crosslinked seed polymer particles; (v) increasing the temperature of the monomer swollen crosslinked seed polymer particles to expel at least some of the monomer therein onto the surface of the particles; and polymerising at least the expelled monomer to form polymer on the surface of the particles.Type: ApplicationFiled: February 24, 2010Publication date: May 24, 2012Inventors: Brian Stanley Hawkett, Thi Thuy Binh Pham, Christopher Henry Such
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Publication number: 20110196088Abstract: The invention provides a method of polymerising monomer to form polymer at the surface of solid particulate material, said method comprising: providing a dispersion of said solid particulate material in a continuous hydrophilic liquid phase, said dispersion comprising a hydrophilic RAFT agent as a stabiliser for said solid particulate material, and said continuous hydrophilic liquid phase comprising one or more ethylenically unsaturated monomers; and polymerising said one or more ethylenically unsaturated monomers under the control of said hydrophilic RAFT agent to thereby form polymer at the surface of said solid particulate material.Type: ApplicationFiled: April 20, 2011Publication date: August 11, 2011Applicant: THE UNIVERSITY OF SYDNEYInventors: Brian Stanley HAWKETT, Christopher Henry Such, Duc Ngoc Nguyen
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Publication number: 20110190566Abstract: The present invention relates to polymer microgel beads having a polymeric matrix with nanomagnetic particles dispersed substantially uniformly therethrough, wherein a steric stabiliser is associated with the particles, the steric stabiliser being a polymeric material that (i) does not form part of the polymeric matrix of the beads, and (ii) comprises a steric stabilising polymeric segment and an anchoring polymeric segment, wherein the steric stabilising polymeric segment is different from the anchoring polymeric segment, and wherein the anchoring polymeric segment has an affinity toward the surface of the nanomagnetic particles and secures the stabiliser to the particles.Type: ApplicationFiled: May 15, 2009Publication date: August 4, 2011Applicant: University Of SydneyInventors: Brian Stanley Hawkett, Nirmesh Jain
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Publication number: 20110129417Abstract: The present invention relates to a composition suitable for administration to a subject, the composition comprising pharmacologically acceptable particulate material dispersed throughout a pharmacologically acceptable liquid carrier, the particulate material being maintained in the dispersed state by a steric stabiliser, wherein the steric stabiliser is a polymeric material comprising a steric stabilising polymeric segment and an anchoring polymeric segment, one or both of which are derived from one or more ethylenically unsaturated monomers that have been polymerised by a living polymerisation technique, wherein the steric stabilising polymeric segment is different from the anchoring polymeric segment, and wherein the anchoring polymeric segment has an affinity toward the surface of the particulate material and secures the stabiliser to the particulate material.Type: ApplicationFiled: May 15, 2009Publication date: June 2, 2011Applicant: University of SydneyInventors: Brian Stanley Hawkett, Nirmesh Jain, Thi Thuy Pham, Yanjun Wang, Gregory Goodman Warr
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Publication number: 20110118533Abstract: The present invention relates to polymer microgel beads having a polymeric matrix with nanomagnetic particles dispersed substantially uniformly therethrough, wherein a steric stabiliser is associated with the particles, the steric stabiliser being a polymeric material that (i) forms at least part of the polymeric matrix of the beads, and (ii) comprises a steric stabilising polymeric segment and an anchoring polymeric segment, wherein the steric stabilising polymeric segment is different from the anchoring polymeric segment, and wherein the anchoring polymeric segment has an affinity toward the surface of the nanomagnetic particles and secures the stabiliser to the particles.Type: ApplicationFiled: May 15, 2009Publication date: May 19, 2011Applicant: University of SydneyInventors: Brian Stanley Hawkett, Nirmesh Jain
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Publication number: 20100227975Abstract: The invention provides a method for preparing an aqueous dispersion of polymer particles comprising the following steps: (i) preparing a dispersion having a continuous aqueous phase, a dispersed organic phase comprising one or more ethylenically unsaturated monomers, and an amphiphilic RAFT agent as a stabiliser for said organic phase, and (ii) polymerising said one or more ethylenically unsaturated monomers under the control of said amphiphilic RAFT agent to form said aqueous dispersion of polymer particles, novel amphiphilic RAFT agents for use in this method, novel RAFT agents useful in making these amphiphilic RAFT agents and methods for their manufacture.Type: ApplicationFiled: May 14, 2010Publication date: September 9, 2010Applicant: UNIVERSITY OF SYDNEYInventors: Christopher Henry SUCH, Ezio RIZZARDO, Algirdas Kazimieras SERELIS, Brian Stanley HAWKETT, Robert Goulston GILBERT, Christopher James FERGUSON, Robert John HUGHES, Edna Olejnik
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Patent number: 7745553Abstract: The invention provides a method for preparing an aqueous dispersion of polymer particles comprising the following steps: (i) preparing a dispersion having a continuous aqueous phase, a dispersed organic phase comprising one or more ethylenically unsaturated monomers, and an amphiphilic RAFT agent as a stabilizer for said organic phase, and (ii) polymerizing said one or more ethylenically unsaturated monomers under the control of said amphiphilic RAFT agent to form said aqueous dispersion of polymer particles, novel amphiphilic RAFT agents for use in this method, novel RAFT agents useful in making these amphiphilic RAFT agents and methods for their manufacture.Type: GrantFiled: December 20, 2002Date of Patent: June 29, 2010Assignee: University of SydneyInventors: Christopher Henry Such, Ezio Rizzardo, Algirdas Kazimieras Serelis, Brian Stanley Hawkett, Robert Goulston Gilbert, Christopher James Ferguson, Robert John Hughes, Edna Olejnik, legal representative
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Publication number: 20100048750Abstract: The invention provides a method of preparing an aqueous dispersion of vesiculated polymer particles, the method comprising: preparing a dispersion of polymerisable particles within a continuous aqueous phase, the polymerisable particles having a structure that is defined by an outer organic phase that comprises one or more ethylenically unsaturated monomers and surrounds an inner aqueous phase, said inner aqueous phase defining a single void within the polymerisable particle, wherein a RAFT agent functions as a stabiliser for the outer organic phase within the continuous aqueous phase, and wherein a RAFT agent functions as a stabiliser for the inner aqueous phase within the outer organic phase; and polymerising the one or more ethylenically unsaturated monomers under the control of a RAFT agent functioning as said stabiliser to form the aqueous dispersion of vesiculated polymer particles.Type: ApplicationFiled: October 19, 2007Publication date: February 25, 2010Applicant: The University of SydneyInventors: Annabelle Christina Mary Blom, Michelle Jocelyn Carey, Brian Stanley Hawkett, Duc Ngoc Nguyen, Thi Thuy Binh Pham, Christopher Henry Such, Gregory Goodman Warr
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Publication number: 20090258979Abstract: The invention provides a method of polymerising monomer to form polymer at the surface of solid particulate material, said method comprising: providing a dispersion of said solid particulate material in a continuous hydrophilic liquid phase, said dispersion comprising a hydrophilic RAFT agent as a stabiliser for said solid particulate material, and said continuous hydrophilic liquid phase comprising one or more ethylenically unsaturated monomers; and polymerising said one or more ethylenically unsaturated monomers under the control of said hydrophilic RAFT agent to thereby form polymer at the surface of said solid particulate material.Type: ApplicationFiled: April 3, 2007Publication date: October 15, 2009Applicant: The University of SydneyInventors: Brian Stanley Hawkett, Christopher Henry Such, Duc Ngoc Nguyen
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Publication number: 20080268250Abstract: A method of polymerising monomer to form polymer at the surface of particulate material, said method comprising: providing a dispersion of said particulate material in a continuous liquid phase, said dispersion comprising a RAFT agent as a stabiliser for said particulate material, and said continuous liquid phase comprising one or more ethylenically unsaturated monomers; and polymerising said one or more ethylenically unsaturated monomers under the control of said RAFT agent to thereby form polymer at the surface of said particulate material.Type: ApplicationFiled: October 4, 2005Publication date: October 30, 2008Inventors: Brian Stanley Hawkett, Christopher Henry Such, Duc Ngoc Nguyen, Jason Michael Farrugia, Olga Maree Mackinnon