Patents by Inventor John Norman Reid Samson

John Norman Reid Samson 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).

  • Polymerization process
    Patent number: 6936674
    Abstract: A process for producing a poly-olefin is disclosed, which comprises contacting at least one 1-olefin under polymerisation conditions with a polymerisation catalyst or catalyst system comprising (1) a compound having the Formula (I) wherein M is Fe[II], Fe[III], Co[I], Co[II], Co[III], Mn[I], Mn[II], Mn[III], Mn[IV], Ru[II], Ru[III], Ru[IV], V[II], V[III], V[IV], or V[V], Ti[II], Ti[III] or Ti[IV]; X represents an atom or group covalently or ionically bonded to the transition metal M; T is the oxidation state of the transition metal M and b is the valency of the atom or group X; R1, R2, R3, R4, R5, R6 and R7 are independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; and when any two or more of R1-R7 are hydrocarbyl, substited hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl, said two or more can be linked to form one or more cyclic substituents; and optionally (2) an activating quantity of an activator compound com
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: August 30, 2005
    Assignee: BP Chemicals Limited
    Inventors: Patrick Daniel Yves Behue, Marianne Gil, Susan Katherine Christie, John Norman Reid Samson
  • Polymer blends
    Patent number: 6608140
    Abstract: A polymer blend is disclosed which comprises a blend of (1) one or more polymers made using a late transition metal catalyst, and (2) one or more polyolefins made using a free radical process or polymerized using a Phillips type (chromium oxide) catalyst, a metallocene catalyst, or a Ziegler-Natta catalyst.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: August 19, 2003
    Assignee: BP Chemicals Limited
    Inventors: Susan Katherine Christie, Warren Reed, John Norman Reid Samson
  • Polymerisation process
    Publication number: 20030114609
    Abstract: A process for transitioning between two catalysts is disclosed, comprising the steps of a) discontinuing the feed of the first catalyst into the polymerization reactor, and then b) introducing the second catalyst into the reactor, wherein one of the catalysts comprises a late transition metal catalyst and the other is a catalyst which is incompatible therewith. It is preferred that the late transition metal catalyst is a 2,6-diacetyl pyridine iron catalyst.
    Type: Application
    Filed: October 9, 2002
    Publication date: June 19, 2003
    Inventor: John Norman Reid Samson
  • Polymerization catalysts
    Patent number: 6458739
    Abstract: The present invention relates to transition metal compounds and to polymerization catalyst systems employing said transition metal compounds.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: October 1, 2002
    Assignee: BP Chemicals Limited
    Inventors: Brian Stephen Kimberley, John Norman Reid Samson
  • 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
  • Polymer blends
    Publication number: 20020004560
    Abstract: A polymer blend is disclosed which comprises a blend of
    Type: Application
    Filed: February 6, 2001
    Publication date: January 10, 2002
    Inventors: Susan Katherine Christie, Warren Reed, John Norman Reid Samson