Patents by Inventor Barry Charles Holdstock

Barry Charles Holdstock 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).

  • Process for the preparation of a diol
    Patent number: 7645846
    Abstract: There is provided a process for the preparation of a polymerizable composition comprising a cross-linker and a polymerizable monomer of formula (I) comprising (i) contacting a compound of formula (II) with an acid such as an imobilized acid; and (ii) neutralizing product of (i) such that a crosslinker is formed.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: January 12, 2010
    Assignee: CooperVision International Holding Company LP
    Inventors: Barry Charles Holdstock, Trevor Owen Glasey
  • Process for the preparation of a diol
    Patent number: 6610895
    Abstract: There is provided a process for the preparation of a polymerisable monomer of formula (I) comprising contacting a compound of formula (II) with an acid such as an immobilised acid.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: August 26, 2003
    Assignee: Hydron Limited
    Inventors: Barry Charles Holdstock, Trevor Owen Glasey
  • Process for the preparation of a diol
    Publication number: 20020042546
    Abstract: There is provided a process for the preparation of a polymerisable monomer of formula (I) comprising contacting a compound of formula (II) with an acid such as an imobilised acid.
    Type: Application
    Filed: October 15, 2001
    Publication date: April 11, 2002
    Inventors: Barry Charles Holdstock, Trevor Owen Glasey
  • Process for the preparation of a diol
    Publication number: 20020042549
    Abstract: There is provided a process for the preparation of a polymerizable composition comprising a cross-linker and a polymerizable monomer of formula (I) comprising (i) contacting a compound of formula (II) with an acid such as an imobilized acid; and (ii) neutralizing product of (i) such that a crosslinker is formed.
    Type: Application
    Filed: October 15, 2001
    Publication date: April 11, 2002
    Inventors: Barry Charles Holdstock, Trevor Owen Glasey