Patents by Inventor James Howard Johnston

James Howard Johnston 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: 11292923
    Abstract: A composite resin comprising silver nanoparticles and a polymer where the silver nanoparticles are formed by reduction of silver ions by the functional groups of the polymer without the addition or application of an external reducing agent. The composite e resin has a low silver leach rate. The composite resin may be used as a surface coating, particularly an antimicrobial or antifouling surface coating.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: April 5, 2022
    Assignee: INHIBIT COATINGS LIMITED
    Inventors: Eldon Warwick Tate, James Howard Johnston
  • Patent number: 11292922
    Abstract: A composite resin comprising silver nanoparticles and a polymer where the silver nanoparticles are formed by reduction of silver ions by the functional groups of the polymer without the addition or application of an external reducing agent. The composite resin has a low silver leach rate. The composite resin may be used as a surface coating, particularly an antimicrobial or antifouling surface coating.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: April 5, 2022
    Assignee: INHIBIT COATINGS LIMITED
    Inventors: Eldon Warwick Tate, James Howard Johnston
  • Publication number: 20200239709
    Abstract: A composite resin comprising silver nanoparticles and a polymer where the silver nanoparticles are formed by reduction of silver ions by the functional groups of the polymer without the addition or application of an external reducing agent. The composite e resin has a low silver leach rate. The composite resin may be used as a surface coating, particularly an antimicrobial or antifouling surface coating.
    Type: Application
    Filed: March 13, 2020
    Publication date: July 30, 2020
    Inventors: Eldon Warwick Tate, James Howard Johnston
  • Publication number: 20080305027
    Abstract: This invention relates to the preparation, functionalisation and use of a novel nano structured silicate, generally a calcium silicate which may be hydrated. It also relates to novel methods of producing nano structured silicates. The novel nano-structured silicate material comprises a calcium silicate in the form of platelets of about 5-10 nm thick and about 50-500 nm wide or wider stacked together in a poorly ordered framework type structure as illustrated in FIG. 1. The novel material can be prepared by reacting a calcium ion containing solution with a silicate containing solution under controlled conditions and then allowing the calcium silicate to age. The novel silicate has pores of a high volume and which are readily accessible. This provides a high oil absorption capacity and high surface area. Novel nano-structured silicate materials are produced by the invention having an oil absorption capacity up to 700 g.oil.100 g?1 silicate and a surface area up to 600 m2g?1.
    Type: Application
    Filed: January 17, 2006
    Publication date: December 11, 2008
    Inventors: James Howard Johnston, Andrew James McFarlane, Thomas Borrmann
  • Patent number: 7332095
    Abstract: An oxidation process is described which involves subjecting a feedstock which contains oxidizable material to temperature, pressure and contact with an oxidant. Excess water and volatile oxidation products, such as carbon dioxide, formic acid and acetic acid, are removed in the vapor phase. A catalyst may be employed to increase the rate of reaction. Preferred catalysts include the transition metal ions. Advantageously, the process may be operated in a continuous manner wherein the feedstock is continuously introduced into a reactor and a vapor phase containing volatile oxidation products continuously removed. The process is particularly applicable to the treatment of consumer and industrial waste.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: February 19, 2008
    Assignee: Victoria Link Limited
    Inventors: James Howard Johnston, Peter Thomas Northcote, Michael James Richardson