Patents by Inventor Ian Alexander Macpherson

Ian Alexander Macpherson 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).

  • Method of improving pigment fluorescence
    Patent number: 7160371
    Abstract: A process for the preparation of organic pigments with enhanced fluorescence, which process comprises treating said pigments with a surfactant, and to the fluorescent organic pigments obtained by said process. The pigments according to the present invention can be used in marking applications, wherein durable fluorescence is required.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: January 9, 2007
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Iain Frank Fraser, Sharon Kathleen Wilson, Ian Alexander Macpherson
  • Fluorescent pigments
    Patent number: 6946550
    Abstract: 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: Grant
    Filed: November 19, 2002
    Date of Patent: September 20, 2005
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Iain Frank Fraser, Ian Alexander Macpherson, David Macdonald Smith, Simon Martyr, Greig Chisholm, Stephen John Coughlin
  • Method of improving pigment fluorescence
    Patent number: 6923856
    Abstract: A process for the preparation of organic pigments with enhanced fluorescence, which process comprises treating said pigments with a surfactant, and to the fluorescent organic pigments obtained by said process. The pigments according to the present invention can be used in marking applications, wherein durable fluorescence is required.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: August 2, 2005
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Iain Frank Fraser, Sharon Kathleen Wilson, Ian Alexander Macpherson
  • Method of improving pigment fluorescence
    Publication number: 20040011251
    Abstract: The present invention is directed to a process for the preparation of organic pigments with enhanced fluorescence, which process comprises treating said pigments with a sufactant, and to the fluorescent organic pigments obtained by said process. The pigments according to the present invention can be used in marking applications, wherein durable fluorescence is required.
    Type: Application
    Filed: April 29, 2003
    Publication date: January 22, 2004
    Inventors: Iain Frank Fraser, Sharon Kathleen Wilson, Ian Alexander Macpherson
  • Pigment compositions
    Patent number: 5853464
    Abstract: The present invention provides an ink which contains a SERS--active metal aggregate containing a Raman active compound.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: December 29, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Ian Alexander Macpherson, Iain Frank Fraser, Sharon Kathleen Wilson, Peter Cyril White, Calum Hugh Munro, William Ewen Smith
  • Pigmented plastics compositions
    Patent number: 5837761
    Abstract: A plastics composition comprising a high molecular weight material and an effective coloring amount of an azo pigment of formula ##STR1## where M is Mg, Ca, Sr, Ba or Mn or a mixture of two or more thereof, R.sup.1 and R.sup.2 are chlorine or methyl, x is zero or 1, y is zero or 1 and the sum of x and y is 1, with the proviso that when the high molecular weight material is polyvinyl chloride y is zero.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: November 17, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Ian Alexander MacPherson, Iain Frank Fraser, Alison MacLennan
  • Substituted phthalocyanines
    Patent number: 5759254
    Abstract: The present invention provides a phthalocyanine of Formula (1): ##STR1## wherein: MPc is a phthalocyanine nucleus of Formula (2); ##STR2## in which M is a metal atom, a chloro-metal group, an oxy-metal group or hydrogenX is halogenR.sup.1 is an benzylamino or N-alkyl aminoalkylR.sup.2 is H or an optionally substituted alkyla has an average value from 15 to 8b has an average value from 1 to 8a+b is from 4 to 16.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: June 2, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Ian Alexander Macpherson, Iain Frank Fraser, Sharon Kathleen Wilson
  • Pigment compositions
    Patent number: 5718754
    Abstract: The invention provides 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 an azo, azomethine or polycyclic chromophore and which has an absorption spectrum and a Raman spectrum different from that of the pigment. The compositions are suitable for use in printing inks for security applications.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: February 17, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Ian Alexander Macpherson, Iain Frank Fraser, Peter Cyril White, William Ewen Smith, Calum Hugh Munro
  • Resinated pigment compositions
    Patent number: 5660623
    Abstract: The present invention provides a method of reducing the tendency of a resinated pigment product to self-heat which comprises treating an aqueous slurry of the pigment with a compound of a multivalent metal or metalloid under conditions such as will precipitate an insoluble compound of the metal or metalloid on the pigment, and then isolating the treated pigment.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: August 26, 1997
    Assignee: Ciba-Geigy Corporation
    Inventors: Ian Alexander Macpherson, John Aldred Nimmo, Brian Tuck