Patents by Inventor Edward Quentin Clutton

Edward Quentin Clutton 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).

  • Polymer compositions
    Patent number: 6489427
    Abstract: Polyethylenes are prepared having a density in the range 900-980 kg/m3 and a weight average molecular weight ≧375,000 characterized by a fracture toughness at −40° C. >20 kJ/m2 and a dynamic viscosity of <3000 Pa.s at 100 rad/sec. The polymers also having a die swell of 10-80% and show a desirable combination of physical and processing properties. The polymers are prepared by the use of catalysts comprising a metallocene component and a Ziegler component.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: December 3, 2002
    Assignee: BP Chemicals Limited
    Inventors: Edward Quentin Clutton, Philip Stephen Hope
  • Homopolymer of ethylene
    Patent number: 6455660
    Abstract: A polyethylene having the following properties: an annealed density D/weight average molecular weight Mw relationship defined by the equation D>1104.5Mw−0.0116, and a Charpy Impact I/High Load Melt Index H relationship defined by the equation I>35.OH−0.4. Also, a polyethylene film having the following properties: a density of at least 957 kg/m3; a Dart Impact of at least 130 g; and a polydispersity of less than 12. Both may be made using a tridentate nitrogen-containing transition metal polymerization catalyst.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: September 24, 2002
    Assignee: BP Chemicals Limited
    Inventors: Edward Quentin Clutton, Philip Stephen Hope, Stephen Roy Partington, John Norman Reid Samson