Patents by Inventor Greig Chisholm
Greig Chisholm 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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Publication number: 20170297913Abstract: The present invention provides a method for the generation of hydrogen, where the method comprises the step of reducing a mediator, such as a polyoxometallate, at a working electrode to yield a reduced mediator and generating oxygen at a counter electrode; and contacting the reduced mediator with a catalyst, such as a Pt, Rh, Pd, Mo or Ni containing catalyst, thereby to oxidise the reduced mediator to yield hydrogen.Type: ApplicationFiled: September 11, 2015Publication date: October 19, 2017Inventors: Leroy Cronin, Mark Symes, Greig Chisholm, Benjamin Rausch
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Publication number: 20090018230Abstract: A radiation curing ink comprising from 60 to 90% of an acrylic binder, optionally reactive diluents and/or non-reactive resins, from 1 to 20% of a photoinitiator and optionally a sensitizer, from 5 to 25% of a pigment of the formula from 0.5 to 2.5% of a pigment of the formula in which formulae (I) and (II) A1, A2 and A3 are each independently from each other selected aromatic and substituted aromatic groups and R1 is H or Cl, and M++ is Be++, Mg++, Ca++, Sr++ or Ba++. The invention also pertains to pigment blends and millbases (ink concentrates), as well as their manufacture and their use for preparing especially flexographic or lithographic radiation curing inks. Polychrome ink sets are also claimed.Type: ApplicationFiled: July 7, 2008Publication date: January 15, 2009Inventors: Greig Chisholm, Janie-Anne Pickrell, Kathryn Nicoll
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Patent number: 6946550Abstract: Azo compounds of formula (I), wherein X stands for halogen, in particular for chlorine, or C1-C4alkoxy, in particular for methoxy, Y stands for —CH2— or —O—, R1 and R2, independently from each other, stand for hydrogen, C1-C8alkyl, or C6-C14aryl, which may be substituted up to three times with C1-C8alkyl, C1-C4alkoxy or halogen, a process for their preparation and their use as fluorescent compounds, in particular as solid fluorescent compounds, such as for special effect printing, sectrity printing or in the opto-electronic field.Type: GrantFiled: November 19, 2002Date of Patent: September 20, 2005Assignee: Ciba Specialty Chemicals CorporationInventors: Iain Frank Fraser, Ian Alexander Macpherson, David Macdonald Smith, Simon Martyr, Greig Chisholm, Stephen John Coughlin
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Patent number: 6913640Abstract: Novel improved single-phase mixed crystals of monoazo dyes laked with alkaline earth metal cations and ammonium cations in a molar ratio of about 1:2 having a fine particle size and substantially better fastness properties than similar known products are excellently suitable as tinctorially strong pigments. Also claimed is a process for the preparation of a single-phase mixed crystal pigment of formula wherein E is Mg, Ca or Sr, by crystallisation from an inert hydrophilic liquid in the presence of solvated catiens E++, NR5R6R7R8+, x is a number from 0.33 to 0.62 and y is a number from 0.76 to 1.34, and the concentration of solvated catiens E++ at the beginning of the crystallisation is higher than the concentration of solvated cations NR5R8R7R8+.Type: GrantFiled: January 15, 2002Date of Patent: July 5, 2005Assignee: CIBA Specialty ChemicalsInventors: Philippe Bugnon, Carolin Sansonnens, Greig Chisholm
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Publication number: 20050014936Abstract: Azo compounds of formula (I), wherein X stands for halogen, in particular for chlorine, or C1-C4alkoxy, in particular for methoxy, Y stands for —CH2— or —O—, R1 and R2, independently from each other, stand for hydrogen, C1-C8alkyl, or C6-C14aryl, which may be substituted up to three times with C1-C8alkyl, C1-C4alkoxy or halogen, a process for their preparation and their use as fluorescent compounds, in particular as solid fluorescent compounds, such as for special effect printing, sectrity printing or in the opto-electronic field.Type: ApplicationFiled: November 19, 2002Publication date: January 20, 2005Inventors: Ian Fraser, Ian Macpherson, Simon Martyr, Greig Chisholm, Stephen Coughlin
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Publication number: 20040087781Abstract: Novel improved mixed crystals of monoazo dyes of formula (I), wherein R1 is methyl or chlorine, and R2, R3 and R4 are each independently of the others hydrogen, methyl or chlorine, which dyes have been laked with alkaline earth metal cations and ammonium cations in a molar ratio of about 1:2. The mixed crystals are single-phase. The products according to the invention, while having a fine particle size, exhibit substantially better fasteness properties than similar known products and are therefore excellently suitable as tinctorially strong pigments. In addition, the part played by after-treatment is less critical.Type: ApplicationFiled: December 23, 2003Publication date: May 6, 2004Inventors: Philippe Bugnon, Caroline Sansonnens, Greig Chisholm
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Patent number: 6613140Abstract: The present invention relates to a composition comprising at least one azo pigment of the formula optionally additional azo pigments and a surfactant, and from 0.1 to 50% by weight of a selected resin. The invention further relates to a process for its preparation, its use for the preparation of dispersions, paint systems, coating materials, color filters, inks, preferably printing inks, as well as color toners comprising the inventive pigment compositions, particularly preferable as liquid inks in the packaging industry, and liquid inks for the packaging industry.Type: GrantFiled: September 17, 2001Date of Patent: September 2, 2003Assignee: Ciba Specialty Chemicals CorporationInventors: Greig Chisholm, Sharon Kathleen Wilson
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Patent number: 6482257Abstract: Solid solutions of monoazo pigments comprising a host lattice and at least one guest material wherein the host lattice is a material having the general formula I or II, wherein compound of formula I is defined as The guest material(s) have the same general formulae as their respective hosts with the proviso that they differ in molecular structure in at least one position from the respective hosts.Type: GrantFiled: March 20, 2001Date of Patent: November 19, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Greig Chisholm, Barry William Hay
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Patent number: 6440206Abstract: The present invention is directed to a composition comprising a sorbitan ester of the formula I and a monoazo pigment. The present invention further encompasses a process for its preparation and its use as well as the use of the sorbitan ester I as additive to improve color strength and dispersion properties.Type: GrantFiled: September 19, 2000Date of Patent: August 27, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Greig Chisholm, Barry William Hay
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Publication number: 20020096086Abstract: Composition comprisingType: ApplicationFiled: September 17, 2001Publication date: July 25, 2002Inventors: Greig Chisholm, Sharon Kathleen Wilson
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Patent number: 6402828Abstract: Pigment composition which comprises azo pigments and auxochromes. The composition is prepared in-situ by coupling an aromatic diazonium compound with 3-hydroxy-2-naphthoic acid and can be produced in a fixed quality with excellent reproducibility, transparency, a high color strength, clear and vivid hue and good water resistance.Type: GrantFiled: February 14, 2000Date of Patent: June 11, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Greig Chisholm, Paul Kerwin, Mairi Nicol
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Patent number: 6096801Abstract: The present invention provides a composition comprising a pigment and from 0.1 to 10% by weight, based on the weight of pigment, of at least one dendrimer.Type: GrantFiled: May 19, 1998Date of Patent: August 1, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Mark John Vincent, Greig Chisholm
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Patent number: 6091491Abstract: A plastics material which contains a pigment composition comprising a pigment having adsorbed on its surface, or as a physical mixture, up to 10% by weight, based on the total weight of pigment composition of a coding compound which is a compound containing azo, azomethine or polycyclic chromophore and which has an absorption spectrum and a Raman spectrum different from that of the pigment.Type: GrantFiled: July 20, 1998Date of Patent: July 18, 2000Assignees: Ciba Specialty Chemicals Corporation, University of StrathcyldeInventors: Greig Chisholm, William Ewen Smith, Peter Cyril White