Patents by Inventor Robert A. W. Johnstone
Robert A. W. Johnstone 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: 10919909Abstract: Disclosed is a method for the photoinitiated transformation of a transformable reactive substrate. The method includes an initial step in which a protected ketone photoinitator species which is present in the substrate is deprotected to form the corresponding ketone photoinitiator species for use in a subsequent photoinitiated reaction in the method. The ketone group of the photoinitiator is protected by an unsubstituted 1,3 dioxolane group. Also disclosed are a composition which may be used in the method, the use of the protected ketone photoinitiator in a photoinitiated reaction, as well as the protected ketone photoinitiators themselves.Type: GrantFiled: January 15, 2019Date of Patent: February 16, 2021Assignee: LINTFIELD LIMITEDInventors: Robert A. W. Johnstone, Rui Loureiro
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Publication number: 20190211031Abstract: Disclosed is a method for the photoinitiated transformation of a transformable reactive substrate. The method includes an initial step in which a protected ketone photoinitator species which is present in the suhstrate is deprotected to form the corresponding ketone photoinitiator species for use in a subsequent photoinitiated reaction in the method. The ketone group of the photoinitiator is protected by an unsubstituted 1,3 dioxolanc group. Also disclosed are a composition which may be used in the method, the use of the protected ketone photoinitiator in a photoinitiated reaction, as well as the protected ketone photoinitiators themselves.Type: ApplicationFiled: January 15, 2019Publication date: July 11, 2019Applicant: LINTFIELD LIMITEDInventors: Robert A. W. JOHNSTONE, Rui LOUREIRO
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Patent number: 10221193Abstract: Disclosed is a method for the photoinitiated transformation of a transformable reactive substrate. The method includes an initial step in which a protected ketone photoinitiator species which is present in the substrate is deprotected to form the corresponding ketone photoinitiator species for use in a subsequent photoinitiated reaction in the method. The ketone group of the photoinitiator is protected by an unsubstituted 1, 3 dioxolane group. Also disclosed are a composition which may be used in the method, the use of the protected ketone photoinitiator in a photoinitiated reaction, as well as the protected ketone photoinitiators themselves.Type: GrantFiled: January 17, 2011Date of Patent: March 5, 2019Assignee: Lintfiled LimitedInventors: Robert A. W. Johnstone, Rui Manuel da Silva Loureiro
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Publication number: 20130105297Abstract: Disclosed is a method for the photoinitiated transformation of a transformable reactive substrate. The method includes an initial step in which a protected ketone photoinitiator species which is present in the substrate is deprotected to form the corresponding ketone photoinitiator species for use in a subsequent photoinitiated reaction in the method. The ketone group of the photoinitiator is protected by an unsubstituted 1, 3 dioxolane group. Also disclosed are a composition which may be used in the method, the use of the protected ketone photoinitiator in a photoinitiated reaction, as well as the protected ketone photoinitiators themselves.Type: ApplicationFiled: January 17, 2011Publication date: May 2, 2013Applicant: LINTFIELD LIMITEDInventors: Robert A. W. Johnstone, Rui Manuel da Silva Loureiro
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Patent number: 7353593Abstract: A method for making three-dimensional structures comprises providing a plurality of components, each of which is moveably coupled to a substrate. The components may be pivotally coupled to the substrate by one or more micromachined hinges. The components are moved using electrostatic forces which lift the components from the surface of the substrate. The components may then be moved further by providing electrostatic forces between components. Two or more components may engage with one another to provide a three-dimensional structure.Type: GrantFiled: May 9, 2003Date of Patent: April 8, 2008Assignee: Simon Fraser UniversityInventor: Robert W. Johnstone
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Publication number: 20030192179Abstract: A method for making three-dimensional structures comprises providing a plurality of components, each of which is moveably coupled to a substrate. The components may be pivotally coupled to the substrate by one or more micromachined hinges. The components are moved using electrostatic forces which lift the components from the surface of the substrate. The components may then be moved further by providing electrostatic forces between components. Two or more components may engage with one another to provide a three-dimensional structure.Type: ApplicationFiled: May 9, 2003Publication date: October 16, 2003Inventor: Robert W. Johnstone
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Publication number: 20030033712Abstract: A method for making a three dimensional structure comprises on a substrate providing a plurality of parts hingedly coupled to the substrate; pivoting the parts into positions in which the parts can be inter-engaged by applying electrostatic forces to the parts; and, engaging the parts with one another to provide a three dimensional structure.Type: ApplicationFiled: August 6, 2002Publication date: February 20, 2003Inventor: Robert W. Johnstone
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Lithographic printing plates containing functional groups capable of reacting with a silane compound
Patent number: 5550001Abstract: A radiation-sensitive plate comprises a substrate coated with a radiation-sensitive composition including a component having groups imparting solubility in aqueous solutions and a component having functional groups capable of reacting with a silane compound. The surface of the composition is modified by reaction with a silane compound. The plate gives rise to images of improved ink receptivity and can be developed in aqueous developer liquids after image-wise exposure.Type: GrantFiled: May 5, 1994Date of Patent: August 27, 1996Assignee: DuPont (U.K.) LimitedInventors: John R. Wade, Michael J. Pratt, Robert A. W. Johnstone, David I. Smith -
Patent number: 5430161Abstract: Alkenes can be expoxidized with hydrogen peroxide using a homogeneous heavy metal catalyst, but discharge of spent reaction mixtures releases the heavy metal in the environment. The problem can be ameliorated by selecting a heterogeneous catalyst system comprising a tungsten-containing heteropolyacid supported on selected Group IIa, IIb, IVa or IVb inorganic supports or on a strong basic resin, which catalyst has either been calcined after impregnation of in the impregnation stage an alcoholic solution of the heteropolyacid is employed and by employing a nitrilo or oxygenated polar solvent reaction medium. A number of preferred heteropolyacids satisfy the empirical formula M.sub.3/n PW.sub.w MO.sub.12-w O.sub.40 in which w represents an integer of at least 1, M represents a counterion and n its basicity. Preferred supports include activated alumina, calcined at 400.degree. to 600.degree. C. and cross-linked quaternary ammonium-substituted polystyrene resins.Type: GrantFiled: December 28, 1993Date of Patent: July 4, 1995Assignee: Solvay Interox LimitedInventors: Scott W. Brown, Anthony Hackett, Alexander Johnstone, Robert A. W. Johnstone
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Patent number: 5278022Abstract: A polymeric compound is derived from a polyhydric material and has pendant sulphonate groups of the general formula ##STR1## where X is an aliphatic, aromatic, carbocylic or heterocyclic group; Y is hydrogen, halogen or an alkyl, aryl, alkoxy, aryloxy or aralkyl group, CO.sub. --Z.sup.+, CO.sub.2 R or SO.sub.3 -Z.sup.+ ; Z.sup.+ is a cationic counter ion and R is hydrogen, alkyl, alkylene, aryl or aralkyl group.Type: GrantFiled: March 18, 1992Date of Patent: January 11, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventors: John R. Wade, Robert A. W. Johnstone
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Polymeric compounds having pendant sulphonato groups and method of producing the polymeric compounds
Patent number: 5120799Abstract: A polymeric compound is derived from a polyhydric material and has pendant sulphonate groups of the general formula ##STR1## where X is an aliphatic, aromatic, carbocylic or heterocyclic group; Y is hydrogen, halogen or an alkyl, aryl, alkoxy, aryloxy or aralkyl group, CO.sub.2 --Z.sup.+, CO.sub.2 R or SO.sub.3 --Z.sup.+ ; Z.sup.+ is a cationic counter ion and R is hydrogen, alkyl, alkylene, aryl or aralkyl group.Wherein the polymeric acompound is produced by reacting a polymer having a plurality of pendant hydroxyl groups with a sulphonato substituted acid or with an ester forming derivative.Type: GrantFiled: August 30, 1989Date of Patent: June 9, 1992Assignee: E. I. Du Pont de Nemours and Company (Inc.)Inventors: John R. Wade, Robert A. W. Johnstone -
Patent number: 4211727Abstract: Carboxylic acid halides are reduced to the corresponding aldehydes using zinc borohydride or cadmium borohydride as the reducing agent.Type: GrantFiled: March 15, 1979Date of Patent: July 8, 1980Assignee: Shell Oil CompanyInventors: Ian D. Entwistle, Robert A. W. Johnstone
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Patent number: D460497Type: GrantFiled: September 28, 2001Date of Patent: July 16, 2002Assignee: Andrew Stone Casino Promotions Ltd.Inventors: Robert W. Johnstone, Brian McAndrew