Patents by Inventor Roger B. Pettman
Roger B. Pettman 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: 11267979Abstract: Fluorescent dyes, ink compositions comprising the dyes, methods and devices for printing the ink compositions, images printed using the ink compositions and methods for authenticating the printed images are provided. The fluorescent dyes are heterorotaxanes that include large macrocyclic rings around fluorophores and are capable of emitting solid-state fluorescence. When the heterorotaxanes are combined with encapsulating agents and competitive binding agents in aqueous solution, the resulting ink composition exhibits a complex, dynamic equilibrium that provides a tunable fluorescence emission spectrum with a non-linear response to the dye concentration.Type: GrantFiled: February 6, 2019Date of Patent: March 8, 2022Assignees: Northwestern University, Innotune LLCInventors: James Fraser Stoddart, Xisen Hou, Chenfeng Ke, Roger B. Pettman
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Publication number: 20190169456Abstract: Fluorescent dyes, ink compositions comprising the dyes, methods and devices for printing the ink compositions, images printed using the ink compositions and methods for authenticating the printed images are provided. The fluorescent dyes are heterorotaxanes that include large macrocyclic rings around fluorophores and are capable of emitting solid-state fluorescence. When the heterorotaxanes are combined with encapsulating agents and competitive binding agents in aqueous solution, the resulting ink composition exhibits a complex, dynamic equilibrium that provides a tunable fluorescence emission spectrum with a non-linear response to the dye concentration.Type: ApplicationFiled: February 6, 2019Publication date: June 6, 2019Applicants: Northwestern University, Innotune LLCInventors: James Fraser Stoddart, Xisen Hou, Chenfeng Ke, Roger B. Pettman
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Patent number: 9732177Abstract: An amphiphilic polymeric material which has a straight or branched chain polymer backbone and a multiplicity of side chains attached to the backbone, wherein the backbone is a copolymer of at least one ethylenically-unsaturated aliphatic hydrocarbon monomer and maleic anhydride, or is a terpolymer of maleic anhydride, ethylene, and a further ethylenically unsaturated monomer. A method of synthesizing said polymeric material is also provided, together with chewing gum bases, compositions and emulsions comprising amphiphilic polymeric materials.Type: GrantFiled: November 26, 2008Date of Patent: August 15, 2017Assignee: REVOLYMER (U.K.) LIMITEDInventors: Thomas Charles Castle, Roger B. Pettman, Terence Cosgrove
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Publication number: 20160137864Abstract: Fluorescent dyes, ink compositions comprising the dyes, methods and devices for printing the ink compositions, images printed using the ink compositions and methods for authenticating the printed images are provided. The fluorescent dyes are heterorotaxanes that include large macrocyclic rings around fluorophores and are capable of emitting solid-state fluorescence. When the heterorotaxanes are combined with encapsulating agents and competitive binding agents in aqueous solution, the resulting ink composition exhibits a complex, dynamic equilibrium that provides a tunable fluorescence emission spectrum with a non-linear response to the dye concentration.Type: ApplicationFiled: September 28, 2015Publication date: May 19, 2016Inventors: J. Fraser Stoddart, Xisen Hou, Chenfeng Ke, Roger B. Pettman
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Publication number: 20100233100Abstract: An amphiphilic polymeric material which has a straight or branched chain polymer backbone and a multiplicity of side chains attached to the backbone, wherein the backbone is a copolymer of at least one ethylenically-unsaturated aliphatic hydrocarbon monomer and maleic anhydride, or is a terpolymer of maleic anhydride, ethylene, and a further ethylenically unsaturated monomer. A method of synthesising said polymeric material is also provided, together with chewing gum bases, compositions and emulsions comprising amphiphilic polymeric materials.Type: ApplicationFiled: November 26, 2008Publication date: September 16, 2010Applicant: REVOLYMER LIMITEDInventors: Thomas Charles Castle, Roger B. Pettman, Terence Cosgrove
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Publication number: 20020177738Abstract: The present invention relates to novel optically active benzylalkylcarbinols, to their preparation and to their use, in particular in perfumery.Type: ApplicationFiled: May 23, 2002Publication date: November 28, 2002Inventors: Jay F. Larrow, Roger B. Pettman, Richard A. Silva, Isabelle Storet
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Publication number: 20020119909Abstract: The present invention includes a process for enantioselective preparation of a non-racemic compound, which is either usable as a fragrance or flavor component or is convertible to a fragrance or flavor component by one or more additional reaction steps. The process includes the step of contacting either a substrate capable of forming a non-racemic compound by an enantioselective reaction and a co-reactant in the presence of a non-racemic catalyst, or a non-racemic or enantiopure substrate and a co-reactant, optionally in the presence of a racemic or non-racemic catalyst. The contacting is carried out at a temperature and length of time that is sufficient to produce the non-racemic compound with high optical purity. The process is used in stereoselective preparation of enantiomerically enriched intermediates useful in the preparation of non-racemic, chiral flavor and fragrance components.Type: ApplicationFiled: January 17, 2002Publication date: August 29, 2002Applicant: Rhodia ChiRex, Inc.Inventors: Roger B. Pettman, Richard A. Silva, Jay Francis Larrow, Isabelle Storet
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Patent number: 4927840Abstract: The invention provides imidazole dioxolane derivatives of the general formula: ##STR1## or an acid-addition salt or metal salt complex thereof, in which R represents an optionally substituted phenyl group; R.sup.1 represents a hydrogen atom or an optionally substituted alkyl or alkenyl group; R.sup.2 represents an optionally substituted alkyl group; and n is 1 or 2; processes for their preparation; compositions containing such compounds and their use as fungicides.Type: GrantFiled: November 4, 1988Date of Patent: May 22, 1990Assignee: Shell Internationale Research Maatschappij B.V.Inventors: John R. H. Wilson, Roger B. Pettman
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Patent number: 4927841Abstract: The invention provides imidazole oxime derivatives of the general formula I: ##STR1## or an acid-addition salt or metal salt complex thereof, in which R represents an optionally substituted phenyl group; R.sup.1 represents an optionally substituted alkyl, alkenyl, alkynyl, or aralkyl group; and R.sup.2 represents an optionally substituted alkyl group; processes for their preparation; compositions containing such compounds and their use as fungicides.Type: GrantFiled: November 4, 1988Date of Patent: May 22, 1990Assignee: Shell Internationale Research Maatschappij, B.V.Inventors: John R. H. Wilson, Roger B. Pettman, Derek J. Reid
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Patent number: 4798845Abstract: The invention provides imidazole derivatives of the general formula I: ##STR1## or a salt thereof, in which R represents an optionally substituted phenyl group, R.sup.1 represents an optionally substituted alkyl, cycloalkyl, alkenyl, aryl or aralkyl group, R.sup.2 represents an optionally substituted alkynyl group and Y represents an oxygen or sulphur atom; processes for their preparation and their use as fungicides.Type: GrantFiled: July 9, 1987Date of Patent: January 17, 1989Assignee: Shell Internationale Research Maatschappij, B.V.Inventors: Roger B. Pettman, Nicholas S. Wells
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Patent number: 4782053Abstract: Fungicidal compositions comprise at least one morpholine-type fungicide and at least one imidazole derivative of general formula (I): ##STR1## or a salt thereof; where R represents an optionally substituted phenyl group, R.sup.1 represents an optionally substituted alkyl, cycloalkyl, alkenyl, aryl or aralkyl group, R.sup.2 represents an optionally substituted alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, alkynyl, aryl or aralkyl group, and X represents an oxygen or sulphur atom or a group --NR.sup.3 --, where R.sup.3 represents a hydrogen atom or an optionally substituted alkyl group or R.sup.2 and R.sup.3 together with the interjacent nitrogen atom represent a 5- or 6- member saturated or unsaturated heterocyclic ring optionally containing one or two further heteroatoms. The compositions are particularly useful in combating wheat leaf spot and powdery mildews.Type: GrantFiled: August 28, 1987Date of Patent: November 1, 1988Assignee: Shell Internationale Research Maatschappij B.V.Inventors: Roger B. Pettman, Paul J. Kuhn