Patents by Inventor Michael Stephen Chisholm

Michael Stephen 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).

  • Patent number: 8022135
    Abstract: An embedment casting composition and a process of embedding a specimen in an acrylic polymer matrix is described. The composition comprises an acrylic copolymer and a suitable solvent. The acrylic copolymer is derived from 80-99% w/w methyl methacrylate, 0.1-10% w/w of a C3-C10 olefinically unsaturated acid co-monomer selected from carboxylic, phophonic, sulphonic or phosphinic acids and 0-10% w/w other suitable monomers and/or additives. A process of embedding a specimen in an acrylic polymer matrix, a cast of an embedded metal specimen, the use of an embedment composition for coating a specimen prior to an embedment coating process and use of an embedment composition as the copolymer resin component of an embedment slurry are also described.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: September 20, 2011
    Assignee: Lucite International UK Limited
    Inventor: Michael Stephen Chisholm
  • Publication number: 20090131579
    Abstract: An embedment casting composition and a process of embedding a specimen in an acrylic polymer matrix is described. The composition comprises an acrylic copolymer and a suitable solvent. The acrylic copolymer is derived from 80-99% w/w methyl methacrylate, 0.1-10% w/w of a C3-C10 olefinically unsaturated acid co-monomer selected from carboxylic, phophonic, sulphonic or phosphinic acids and 0-10% w/w other suitable monomers and/or additives. A process of embedding a specimen in an acrylic polymer matrix, a cast of an embedded metal specimen, the use of an embedment composition for coating a specimen prior to an embedment coating process and use of an embedment composition as the copolymer resin component of an embedment slurry are also described.
    Type: Application
    Filed: May 24, 2006
    Publication date: May 21, 2009
    Applicant: LUCITE INTERNATIONAL UK LIMITED
    Inventor: Michael Stephen Chisholm
  • Patent number: 6713584
    Abstract: A method of preparing a (meth)acrylate functionalised polymer comprising the steps of mixing together a monofunctional vinylic monomer with from 0.3-100% w/w (based on monofunctional monomer) of a polyfunctional vinylic monomer and from 0.0001-50% w/w of a chain transfer agent, reacting said mixture to form a polymer and terminating the polymerisation reaction before 99% conversion. The resulting polymers are useful as components of surface coatings and inks, as moulding resins or in curable compounds, e.g. curable moulding resins or photoresists.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: March 30, 2004
    Assignee: Lucite International UK Limited
    Inventors: Michael Stephen Chisholm, Andrew Trevithick Slark
  • Patent number: 6646068
    Abstract: Branched polymers are prepared by mixing together monofunctional vinylic monomer with from 0.3 to 100% w/w of polyfunctional vinylic monomer and from 0.0001 to 50% w/w of chain transfer agent and thereafter reacting the mixture to form a polymer. The resulting branched polymers are soluble and may be used as component of surface coatings and inks as well as molding resins.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: November 11, 2003
    Assignee: Lucite International UK Limited
    Inventors: Michael Stephen Chisholm, Andrew Trevithick Slark, David Sherrington, Nial O'Brien
  • Publication number: 20030013822
    Abstract: A method of preparing a branched polymer comprising the steps of mixing together a monofunctional vinylic monomer with from 0.3-100 % w/w of a polyfunctional vinylic monomer and from 0.0001-50% w/w of a chain transfer agent and thereafter reacting said mixture to form a polymer. The resulting soluble branched polymers are useful as components of surface coatings and inks or as moulding resins.
    Type: Application
    Filed: December 8, 2000
    Publication date: January 16, 2003
    Inventors: Michael Stephen Chisholm, Andrew Trevithick Slark, David Sherrington, Nial O'Brien
  • Publication number: 20020132907
    Abstract: An acrylic polymer composition containing: (a) a first amount of a polythiol capped polymer formed by reacting a polythiol of the form (HS-Y)n-X, wherein X is a core group, each Y group is independently a linking group, n is an integer from 3 to 8, preferably from 3 to 6, with at least one mono olefinically unsaturated monomer capable of attaching to and forming a group Z, which is an acrylic polymer chain, on the sulphur atom in each of the groups (HS-Y); and (b) a second amount of a volatile solvent, and wherein the polythiol capped polymer is differentiated from a linear polymer having the same molecular weight as the polythiol capped polymer and which linear polymer is formed from substantially the same each Z group as the polythiol capped polymer in that a first amount of the linear polymer is: (i) not totally solvated by the second amount of volatile solvent; or (ii) when solvated by the second amount of volatile solvent provides a solution which has a viscosity that is at least 25%, preferably at least
    Type: Application
    Filed: November 19, 1997
    Publication date: September 19, 2002
    Inventor: MICHAEL STEPHEN CHISHOLM
  • Patent number: 6340733
    Abstract: The present invention describes a process for the making of a copolymer of the general formula (I) wherein A is a residue of at least one (meth)acrylate monomeric species, B is a residue of at least one monomeric species copolymerizable with A, R is a (meth)acrylate functionalized pendant ester group, X1 and X2 are terminal groups which may be the same or different, n and p are both at least one and are chosen such that the copolymer has a number average molecular weight of more than 2000.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: January 22, 2002
    Assignee: Imperial Chemical Industries PLC
    Inventors: Andrew Trevithick Slark, Michael Stephen Chisholm, Helen Harte
  • Publication number: 20010051702
    Abstract: The present invention describes a process for the making of a copolymer of the general formula (I) 1
    Type: Application
    Filed: November 30, 2000
    Publication date: December 13, 2001
    Applicant: Imperial Chemical Industries PLC
    Inventors: Andrew Trevithick Slark, Michael Stephen Chisholm, Helen Harte
  • Patent number: 6214959
    Abstract: The present invention describes a process for the making of a copolymer of the general formula (I) wherein A is a residue of at least one (meth)acrylate monomeric species, B is a residue of at least one monomeric species copolymerizable with A, R is a (meth)acrylate functionalized pendant ester group, X1 and X2 are terminal groups which may be the same or different, n and p are both at least one and are chosen such that the copolymer has a number average molecular weight of more than 2000.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: April 10, 2001
    Assignee: Imperial Chemical Industries PLC
    Inventors: Andrew Trevithick Slark, Michael Stephen Chisholm, Helen Harte