Patents by Inventor Henry K. Kennedy-Skipton

Henry K. Kennedy-Skipton 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).

  • Fire resistant additive for hardenable resin compositions
    Patent number: 4251430
    Abstract: A hardenable resin composition (or a component thereof) containing as a fire retardant ingredient particulate aluminium hydroxide wherein 10 to 30% by weight of the particles have a diameter less than 1 micron, 45 to 75% by weight of the particles have a diameter in the range from 38 to 150 microns and less than 20% by weight of the particles have a diameter in the range from 1 to 38 microns. The invention includes a preferred blend of aluminium hydroxide.
    Type: Grant
    Filed: December 8, 1978
    Date of Patent: February 17, 1981
    Assignee: Imperial Chemical Industries Limited
    Inventors: Henry K. Kennedy-Skipton, Thomas Robertson
  • Method of grouting a drill hole
    Patent number: 4236849
    Abstract: Calcium sulphate hemihydrate plaster slurry comprising a set-inhibiting agent, for example, a polymer or copolymer of an acid having the formula R.sup.1 HC.dbd.CR.sup.2 --COOH wherein R.sup.1 and R.sup.2 are hydrogen or methyl. The invention also includes a method of rapid setting of the inhibited slurry by mixing therewith a promoter comprising a salt of iron, copper or aluminium.
    Type: Grant
    Filed: March 26, 1979
    Date of Patent: December 2, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventor: Henry K. Kennedy-Skipton
  • Aqueous gypsum composition
    Patent number: 4196008
    Abstract: A composition for securing a fixing element such as a dowel in a drillhole in a rock mass comprises alpha gypsum gauged with a solution of a water-soluble salt of carboxy methyl cellulose sufficient to render the composition pumpable.
    Type: Grant
    Filed: July 19, 1978
    Date of Patent: April 1, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventor: Henry K. Kennedy-Skipton
  • Calcium sulphate hemihydrate plaster
    Patent number: 4157264
    Abstract: Calcium sulphate hemihydrate plaster slurry comprising a set-inhibiting agent, for example, a polymer or copolymer of an acid having the formula R.sup.1 HC.dbd.CR.sup.2 --COOH wherein R.sup.1 and R.sup.2 are hydrogen or methyl. The invention also includes a method of rapid setting of the inhibited slurry by mixing therewith a promoter comprising a salt of iron, copper or aluminium.
    Type: Grant
    Filed: August 19, 1977
    Date of Patent: June 5, 1979
    Assignee: Imperial Chemical Industries Limited
    Inventor: Henry K. Kennedy-Skipton