Patents by Inventor Christopher James Frye

Christopher James Frye 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).

  • Polyethylene films
    Patent number: 6998440
    Abstract: Novel stretch and blown films are prepared based on copolymers of ethylene and alpha-olefins having (a) a density in the range 0.900 to 0.940 (b) an apparent Mw/Mn of 2–3.4 (c) I21/I2 from 16 to 24 (d) activation energy of flow from 28 to 45 kJ/mol (e) a ratio Ea(HMW)/Ea(LMW)>1.1, and (f) a ratio g?(HMW)/g?(LMW) from 0.85 to 0.95. The films exhibit an excellent combination of strength and processability and are particularly suitable for use as either stretch films or blown films for use as heavy duty sacks. The preferred films show a dart impact of >1100 g and MD elongations of >500%.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: February 14, 2006
    Assignee: BP Chemicals Limited
    Inventors: Frederic Alarcon, Christopher James Frye, David George Gilbert, Brian Leslie Turtle
  • Copolymers and films thereof
    Patent number: 6919414
    Abstract: Novel copolymers comprise ethylene and alpha olefins having from 3 to 10 carbon atoms and which have (a) a density in the range 0.900 to 0.940 (b) Mw/Mn of 2-3.4 (c) I21/I2 from 16 to 24 (d) activation energy of flow from 28 to 45 kJ/mol (e) a ratio Ea(HMW)/Ea(LMW)>1.1, and (f) a ratio g?(HMW)/g?(LMW) from 0.85 to 0.95 The copolymers are particularly useful in film applications showing an excellent balance of processing, optical and mechanical properties. The novel polymers may suitably be prepared in the gas phase in the presence of metallocene complexes.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: July 19, 2005
    Assignee: BP Chemicals Limited
    Inventors: Choon Kooi Chai, Christopher James Frye
  • Novel copolymers and films thereof
    Publication number: 20040044155
    Abstract: Novel copolymers comprise ethylene and alpha olefins having from 3 to 10 carbon atoms and which have
    Type: Application
    Filed: August 26, 2003
    Publication date: March 4, 2004
    Applicant: BP Chemicals Limited
    Inventors: Choon Kooi Chai, Christopher James Frye
  • Novel polyethylene films
    Publication number: 20030229182
    Abstract: Novel stretch and blown films are prepared based on copolymers of ethylene and alpha-olefins having (a) a density in the range 0.900 to 0.940 (b) an apparent Mw/Mn of 2-3.4 (c) I21/I2 from 16 to 24 (d) activation energy of flow from 28 to 45 kJ/mol (e) a ratio Ea(HMW)/Ea(LMW)>1.1, and (f) a ratio g′(HMW)/g′(LMW) from 0.85 to 0.95. The films exhibit an excellent combination of strength and processability and are particularly suitable for use as either stretch films or blown films for use as heavy duty sacks. The preferred films show a dart impact of >1100 g and MD elongations of >500 %.
    Type: Application
    Filed: June 23, 2003
    Publication date: December 11, 2003
    Inventors: Frederic Alarcon, Christopher James Frye, David George Gilbert, Brian Leslie Turtle
  • Low density copolymers of ethylene and alpha-olefins
    Patent number: 6642339
    Abstract: Copolymers of ethylene and alpha olefins having from 3 to 10 carbon atoms and which have (a) a density in the range 0.900 to 0.940 (b) an apparent Mw/Mn of 2-3.4 (c) I21/I2 from 16 to 21.5 (d) activation energy of flow from 28 to 45 kJ/mol (e) a ratio Ea(HMW)/Ea(LMW)>1.1, and (f) a ratio g′(HMW/g′(LMW) from 0.85 to 0.95. The copolymers are particularly useful in film applications showing an excellent balance of processing, optical and mechanical properties. The novel polymers may suitably be prepared in the gas phase in the presence of metallocene complexes.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: November 4, 2003
    Assignee: BP Chemicals Limited
    Inventors: Choon Kooi Chai, Christopher James Frye