Patents by Inventor Thomas Pounds
Thomas Pounds 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: 10985322Abstract: Light-emitting composition and devices including the same, the composition including a fluorescent light-emitting material and a polymer having a conjugating repeat unit and a non-conjugating repeat unit in a backbone of the polymer, and in which the conjugating repeat unit provides at least one conjugation path between repeat units linked to it; the non-conjugating repeat unit reduces conjugation of the polymer as compared to a polymer in which the non-conjugating repeat unit is absent; and a triplet excited state energy level of the light-emitting material is higher than a triplet excited state energy level of the non-conjugating repeat unit.Type: GrantFiled: October 13, 2011Date of Patent: April 20, 2021Assignees: Cambridge Display Technology, Ltd., Sumitomo Chemical Company LimitedInventors: Natasha M. J. Conway, Jonathan Pillow, Thomas Pounds, Fredrik Jakobsson, Christian Nielsen
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Patent number: 9951175Abstract: A method of forming a polymer comprising a conjugated backbone and side-groups pendant from the conjugated backbone wherein the method comprises the steps of: polymerizing one or more monomers to form a precursor polymer comprising the conjugated backbone and precursor groups pendant from the conjugated backbone, and subsequently converting the precursor groups to the side-groups.Type: GrantFiled: March 26, 2015Date of Patent: April 24, 2018Assignee: Sumitomo Chemical Company LimitedInventors: Thomas Pounds, Martin Humphries, Nazrul Islam
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Publication number: 20170174824Abstract: A method of forming a polymer comprising a conjugated backbone and side-groups pendant from the conjugated backbone wherein the method comprises the steps of: polymerising one or more monomers to form a precursor polymer comprising the conjugated backbone and precursor groups pendant from the conjugated backbone, and subsequently converting the precursor groups to the side-groups.Type: ApplicationFiled: March 26, 2015Publication date: June 22, 2017Applicant: Sumitomo Chemical Company LimitedInventors: Thomas Pounds, Martin Humphries, Nazrul Islam
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Patent number: 9136494Abstract: A white light emitting material comprising a polymer having an emitting polymer chain and at least one emitting end capping group.Type: GrantFiled: March 18, 2013Date of Patent: September 15, 2015Assignees: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED, SUMITOMO CHEMICAL CO. LIMITEDInventors: Richard Wilson, Thomas Pounds, Natasha M. Conway, Ilaria Grizzi, Antonio Guerrero Castillejo
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Patent number: 8916677Abstract: A monomer of formula (III): wherein X is a polymerisable group Ar, Ar1 and Ar2 each independently represent an optionally substituted aryl or heteroaryl group; R1 represents H or a substituent; and Z represents a direct bond or a divalent linking atom or group, wherein Ar1 and Ar2 are linked by a single bond or a divalent linking group selected from CR1R2, SiR1R2, PR1, NR1, O and S wherein R1 and R2 are independently selected from hydrogen; optionally substituted alkyl wherein one or more non-adjacent C atoms may be replaced with O, S, N, C?O and —COO—; alkoxy, aryl, arylalkyl, heteroaryl and heteroarylalkyl. Ar1 and Ar2 are preferably linked by an oxygen atom, and Ar1 and/or Ar2 may be fused to their respective adjacent Ar groups. Ar1 and its adjacent Ar group and/or Ar2 and its adjacent Ar group are optionally fused to form a fluorene unit.Type: GrantFiled: April 15, 2010Date of Patent: December 23, 2014Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company LimitedInventors: Mary McKiernan, Thomas Pounds
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Patent number: 8916675Abstract: A method for forming a polymer comprising the polymerization of a plurality of monomers, wherein at least one of the plurality of monomers is one or both of: a charge transporting unit and a hydrocarbon monomer in which at least one carbon atom has been substituted by an atom or group with a greater quantity of unshared valence electrons than the carbon atom it has been substituted for, and wherein at least one of the plurality of monomers comprises an end-capping compound at one end of said monomer, the end-capping compound preventing polymerization at the end, wherein the end-capping compound is not charge transporting and comprises at least two rings. The end capping compound preferably consists of or includes a structural unit having the formula: (Ar)n—X, wherein Ar in each occurrence independently represents an aryl or heteroaryl group; X represents a leaving group comprising a boron derivative group or halogen; and n is 2 or more.Type: GrantFiled: April 15, 2010Date of Patent: December 23, 2014Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company LimitedInventors: Mary McKiernan, Thomas Pounds
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Patent number: 8860007Abstract: The invention relates to organic semiconductive polymers comprising a new backbone system, monomers for the preparation of such polymers, methods for the preparation of such polymers and the use of such polymers in organic optoelectronic devices.Type: GrantFiled: November 6, 2003Date of Patent: October 14, 2014Assignee: Merck Patent GmbHInventors: Carl Towns, Ian Rees, Ilaria Grizzi, Mary Mckiernan, Paul Wallace, Thomas Pounds, Clare Foden, Sophie Heidenhain
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Patent number: 8614011Abstract: An electroluminescent material comprises the following structural unit: where X is selected from a group consisting of NR, O, S, SO, SO2, CR2, PR, POR, BR, SiR2; where R is a substituent group and Ar1 and Ar2 comprise aromatic rings; and, wherein Ar1 or Ar2 is fused to a further aryl system Ar3. An optical device comprises a first electrode for injection of positive charge carriers, a second electrode for injection of negative charge carriers and a layer located between the first and second electrode comprising the electroluminescent material.Type: GrantFiled: July 23, 2009Date of Patent: December 24, 2013Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Co., Ltd.Inventors: Annette Steudel, Thomas Pounds
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Publication number: 20130292657Abstract: Light-emitting composition and devices including the same, the composition including a fluorescent light-emitting material and a polymer having a conjugating repeat unit and a non-conjugating repeat unit in a backbone of the polymer, and in which the conjugating repeat unit provides at least one conjugation path between repeat units linked to it; the non-conjugating repeat unit reduces conjugation of the polymer as compared to a polymer in which the non-conjugating repeat unit is absent; and a triplet excited state energy level of the light-emitting material is higher than a triplet excited state energy level of the non-conjugating repeat unit.Type: ApplicationFiled: October 13, 2011Publication date: November 7, 2013Applicants: Sumitomo Chemical Company Limited, Cambridge Display Technology, Ltd.Inventors: Natasha M.J. Conway, Jonathan Pillow, Thomas Pounds, Fredrik Jakobsson, Christian Nielsen
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Publication number: 20130237680Abstract: A white light emitting material comprising a polymer having an emitting polymer chain and at least one emitting end capping group.Type: ApplicationFiled: March 18, 2013Publication date: September 12, 2013Applicants: Sumitomo Chemical Co., Ltd., Cambridge Display Technology LimitedInventors: Richard Wilson, Thomas Pounds, Natasha M. Conway, Ilaria Grizzi, Antonio Guerrero Castillejo
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Publication number: 20120053315Abstract: A monomer of formula (III): wherein X is a polymerisable group Ar, Ar1 and Ar2 each independently represent an optionally substituted aryl or heteroaryl group; R1 represents H or a substituent; and Z represents a direct bond or a divalent linking atom or group, wherein Ar1 and Ar2 are linked by a single bond or a divalent linking group selected from CR1R2, SiR1R2, PR1, NR1, O and S wherein R1 and R2 are independently selected from hydrogen; optionally substituted alkyl wherein one or more non-adjacent C atoms may be replaced with O, S, N, C?O and —COO—; alkoxy, aryl, arylalkyl, heteroaryl and heteroarylalkyl. Ar1 and Ar2 are preferably linked by an oxygen atom, and Ar1 and/or Ar2 may be fused to their respective adjacent Ar groups. Ar1 and its adjacent Ar group and/or Ar2 and its adjacent Ar group are optionally fused to form a fluorene unit.Type: ApplicationFiled: April 15, 2010Publication date: March 1, 2012Applicants: Sumitomo Chemical Company Limited, Cambridge Display Technology LimitedInventors: Mary McKiernan, Thomas Pounds
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Publication number: 20120046440Abstract: A method for forming a polymer comprising the polymerization of a plurality of monomers, wherein at least one of the plurality of monomers is one or both of: a charge transporting unit and a hydrocarbon monomer in which at least one carbon atom has been substituted by an atom or group with a greater quantity of unshared valence electrons than the carbon atom it has been substituted for, and wherein at least one of the plurality of monomers comprises an end-capping compound at one end of said monomer, the end-capping compound preventing polymerization at the end, wherein the end-capping compound is not charge transporting and comprises at least two rings. The end capping compound preferably consists of or includes a structural unit having the formula: (Ar)n—X, wherein Ar in each occurrence independently represents an aryl or heteroaryl group; X represents a leaving group comprising a boron derivative group or halogen; and n is 2 or more.Type: ApplicationFiled: April 15, 2010Publication date: February 23, 2012Applicants: SUMITOMO CHEMICAL COMPANY LIMITED, CAMBRIDGE DISPLAY TECHNOLOGY LIMITEDInventors: Mary McKiernan, Thomas Pounds
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Publication number: 20110186827Abstract: A light-emissive polymer comprising the following unit: where X is one of S, O, P and N; Z is N or P; and R is an alkyl wherein one or more non-adjacent C atoms other that the C atom adjacent to Z may be replaced with O, S, N, C?O and —COO— or an optionally substituted aryl or heteroaryl group.Type: ApplicationFiled: July 30, 2009Publication date: August 4, 2011Applicants: Cambridge Display Technology Limited, Sumation Company LimitedInventors: Torsten Buennagel, Thomas Pounds, Mary Mckierman
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Publication number: 20110186826Abstract: An electroluminescent material comprises the following structural unit: where X is selected from a group consisting of NR, O, S, SO, SO2, CR2, PR, POR, BR, SiR2; where R is a substituent group and Ar1 and Ar2 comprise aromatic rings; and, wherein Ar1 or Ar2 is fused to a further aryl system Ar3. An optical device comprises a first electrode for injection of positive charge carriers, a second electrode for injection of negative charge carriers and a layer located between the first and second electrode comprising the electroluminescent material.Type: ApplicationFiled: July 23, 2009Publication date: August 4, 2011Applicants: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED, SUMATION COMPANY LIMITEDInventors: Annette Steudel, Thomas Pounds
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Publication number: 20100320454Abstract: A white light emitting material comprising a polymer having an emitting polymer chain and at least one emitting end capping group.Type: ApplicationFiled: January 22, 2009Publication date: December 23, 2010Applicant: Cambridge Display Technology LimitedInventors: Richard Wilson, Thomas Pounds, Natasha M. Conway, Ilaria Grizzi, Antonio Guerrero Castillejo
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Patent number: 7754841Abstract: The present invention relates to new semiconductive oligomers and polymers, a process for their manufacture and their use in thin film electronic and optical devices, such as organic light emitting diodes (OLED) and photovoltaic devices, eg. solar cells and photodetectors.Type: GrantFiled: June 22, 2004Date of Patent: July 13, 2010Assignee: Merck Patent GmbHInventors: Richard O'Dell, Thomas Pounds, Paul Wallace, Carl Towns, Mary Mc Kiernan
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Patent number: 7534503Abstract: A monomer having general Formula (I) which may be substituted or unsubstituted: where E and E are the same or different and are reactive groups capable of undergoing chain extension; X is O, S, NR5, R5C—CR6 or R5?CR6; Y is O, S, NR7, R7C—CR8 or R7C?CR8; R5, R6 R7 and R8 are the same or different and each is independently H or a substituent group; and each Ar is the same or different and is independently a substituted or unsubstituted aryl or heteroaryl group.Type: GrantFiled: January 23, 2002Date of Patent: May 19, 2009Assignee: Cambridge Display Technology LimitedInventors: Jeremy Burroughes, Carl Towns, Thomas Pounds, Jonathan Halls
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Patent number: 7368616Abstract: The instant invention relates to a new method for the synthesis of monomers and their use inter alia in the manufacture of semiconductive polymers. Monomers, in particular, asymmetric monomers, such as asymmetric fluorene compounds, are valuable material in the manufacture of semiconductive polymers. The know methods for producing asymmetric monomers, such as asymmetric fluorene compounds, are expensive due to the formation of by-products. The method according to the present invention avoids the formation of such by-products and is described in more detail in claims 1 to 14.Type: GrantFiled: October 29, 2003Date of Patent: May 6, 2008Assignee: Merck Patent GmbHInventors: Paul Wallace, Carl Towns, Thomas Pounds
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Patent number: 7173103Abstract: A process for preparing high molecular weight polymers or copolymers by Suzuki coupling. The catalyst used in the process comprises a source of palladium and a source of a phosphine characterized in that at least one substituent on the phosphine is an ortho substituted aryl group. The process is suitable for the preparation of polymers for use in electronic and optoelectronic applications.Type: GrantFiled: October 21, 2002Date of Patent: February 6, 2007Assignee: Cambridge Display Technology LimitedInventors: Carl Towns, Paul Wallace, Ian Allen, Thomas Pounds, Lorraine Murtagh
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Publication number: 20060149016Abstract: The present invention relates to new semiconductive oligomers and polymers, a process for their manufacture and their use in thin film electronic and optical devices, such as organic light emitting diodes (OLED) and photovoltaic devices, eg. solar cells and photodetectors.Type: ApplicationFiled: June 22, 2004Publication date: July 6, 2006Inventors: Richard O'Dell, Thomas Pounds, Paul Wallace, Carl Towns, Mary McKiernan