Patents by Inventor Stephen John Brown
Stephen John Brown 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).
-
Publication number: 20200238250Abstract: The various embodiments of the present invention relate to a polymerization reactor where the agitator mixing performance is optimized for use with a high activity catalyst and methods for developing the same.Type: ApplicationFiled: March 12, 2020Publication date: July 30, 2020Applicant: NOVA Chemicals (International) S.A.Inventors: Yves Lacombe, Eric Clavelle, Stephen Salomons, Andrew Hawryluk, Stephen John Brown, Marion Walls
-
Patent number: 10675605Abstract: The various embodiments of the present invention relate to a polymerization reactor where the agitator mixing performance is optimized for use with a high activity catalyst and methods for developing the same.Type: GrantFiled: January 4, 2016Date of Patent: June 9, 2020Assignee: NOVA Chemicals (International) S.A.Inventors: Yves Lacombe, Eric Clavelle, Stephen Salomons, Andrew Hawryluk, Stephen John Brown, Marion Walls
-
Patent number: 10160696Abstract: The oligomerization of ethylene using a chromium catalyst having a heteroatomic ligand may be used to provide oligomerization products that are selective towards hexene and/or octene. However, such processes also typically produce some polymer as an undesirable by product. The present invention is directed towards improvements in the selective oligomerization of ethylene.Type: GrantFiled: April 22, 2016Date of Patent: December 25, 2018Assignee: NOVA Chemicals (International) S.A.Inventors: Isam Jaber, Ian Ronald Jobe, P Scott Chisholm, Andrzej Krzywicki, Charles Ashton Garret Carter, Vernon Lindsay Strom, Kamal Elias Serhal, Eric Clavelle, Stephen John Brown, Yves Lacombe, Anita Sylvia Magis, Mackenzie Alexander Harris, Russell Kirk Archer, Keith WAyne Besenski, Michel Berghmans, Oleksiy Golovchenko, Dale Alexander Sieben
-
Patent number: 10093780Abstract: Shrink film having a desirable balance of properties is manufactured from a polyethylene blend composition having a fractional melt index and a molecular weight distribution of from about 2.5 to about 7. The blend composition comprises a first blend component that is made with a single site catalyst and has a molecular weight of greater than about 140,000 and a first density, d1. The blend composition also contains a second blend component having a lower molecular weight and a second density, d2, that is greater than the density of d1 in an amount of from about 0.018 to about 0.032 g/cc. The films of this disclosure may be used, for example, as an overwrap or pallet wrap to protect goods during shipping and in food packaging applications (such as shrink wrap for frozen poultry).Type: GrantFiled: September 21, 2015Date of Patent: October 9, 2018Assignee: NOVA Chemicals (International) S.A.Inventors: XiaoChuan Wang, Peter Zoricak, Norman Dorien Joseph Aubee, Stephen John Brown
-
Patent number: 10023729Abstract: This disclosure relates to films comprising at least one layer of an ethylene interpolymer product. The ethylene interpolymer product comprises a first ethylene interpolymer, a second ethylene interpolymer and optionally a third ethylene interpolymer; wherein the ethylene interpolymer product has ?0.03 terminal vinyl unsaturations per 100 carbon atoms and ?3 parts per million (ppm) of a total catalytic metal; and optionally a Dilution Index, Yd, greater than 0. The disclosed ethylene interpolymer products have a melt index from about 0.4 to about 10 dg/minute, a density from about 0.900 to about 0.940 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 12 and a CDBI50 from about 20% to about 98%. Further, the ethylene interpolymer products are a blend of at least two ethylene interpolymers; where one ethylene interpolymer is produced with a single-site catalyst formulation and at least one ethylene interpolymer is produced with a heterogeneous catalyst formulation.Type: GrantFiled: April 21, 2016Date of Patent: July 17, 2018Assignee: NOVA Chemicals (International) S.A.Inventors: Marcelo Yamane, Tieqi Li, Xiaochuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Edward Taylor, Hamidreza Khakdaman, Stephen John Brown
-
Publication number: 20170361301Abstract: The various embodiments of the present invention relate to a polymerization reactor where the agitator mixing performance is optimized for use with a high activity catalyst and methods for developing the same.Type: ApplicationFiled: January 4, 2016Publication date: December 21, 2017Applicant: NOVA Chemicals (International) S.A.Inventors: Yves Lacombe, Eric Clavelle, Stephen Salomons, Andrew Hawriuk, Stephen John Brown, Marion Walls
-
Patent number: 9688588Abstract: A continuous flow process for the oligomerization of ethylene using a chromium catalyst having a phosphorus-nitrogen-phosphorus (“P—N—P”) ligand provides high selectivity to the desired tetramer (1-octene) with reduced production of coproduct C10+ oligomers. Prior art processes that maximize catalyst activity have provided comparatively poor product selectivity. In particular, the production of larger amounts of C10+ oligomers have been observed under conditions that maximize activity. The present process resolves this problem through the use of a combination of low catalyst concentration and by limiting the octene concentration in the reactor.Type: GrantFiled: December 4, 2013Date of Patent: June 27, 2017Assignee: NOVA Chemicals (International) S.A.Inventors: Peter Zoricak, Stephen John Brown, P Scott Chisholm
-
Publication number: 20160237000Abstract: The oligomerization of ethylene using a chromium catalyst having a heteroatomic ligand may be used to provide oligomerization products that are selective towards hexene and/or octene. However, such processes also typically produce some polymer as an undesirable by product. The present invention is directed towards improvements in the selective oligomerization of ethylene.Type: ApplicationFiled: April 22, 2016Publication date: August 18, 2016Applicant: NOVA Chemicals (International) S.A.Inventors: Isam Jaber, Ian Ronald Jobe, P. Scott Chisholm, Andrzej Krzywicki, Charles Ashton Garret Carter, Vernon Lindsay Strom, Kamal Elias Serhal, Eric Clavelle, Stephen John Brown, Yves Lacombe, Anita Sylvia Magis, Mackenzie Alexander Harris, Russell Kirk Archer, Keith Wayne Besenski, Michel Berghmans, Oleksiy Golovchenko, Dale Alexander Sieben
-
Publication number: 20160229996Abstract: This disclosure relates to films comprising at least one layer of an ethylene interpolymer product. The ethylene interpolymer product comprises a first ethylene interpolymer, a second ethylene interpolymer and optionally a third ethylene interpolymer; wherein the ethylene interpolymer product has ?0.03 terminal vinyl unsaturations per 100 carbon atoms and ?3 parts per million (ppm) of a total catalytic metal; and optionally a Dilution Index, Yd, greater than 0. The disclosed ethylene interpolymer products have a melt index from about 0.4 to about 10 dg/minute, a density from about 0.900 to about 0.940 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 12 and a CDBI50 from about 20% to about 98%. Further, the ethylene interpolymer products are a blend of at least two ethylene interpolymers; where one ethylene interpolymer is produced with a single-site catalyst formulation and at least one ethylene interpolymer is produced with a heterogeneous catalyst formulation.Type: ApplicationFiled: April 21, 2016Publication date: August 11, 2016Applicant: NOVA Chemicals (International) S.A.Inventors: Marcelo Yamane, Tieqi Li, Xiaochuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Edward Taylor, Hamidreza Khakdaman, Stephen John Brown
-
Publication number: 20160083539Abstract: Shrink film having a desirable balance of properties is manufactured from a polyethylene blend composition having a fractional melt index and a molecular weight distribution of from about 2.5 to about 7. The blend composition comprises a first blend component that is made with a single site catalyst and has a molecular weight of greater than about 140,000 and a first density, d1. The blend composition also contains a second blend component having a lower molecular weight and a second density, d2, that is greater than the density of d1 in an amount of from about 0.018 to about 0.032 g/cc. The films of this disclosure may be used, for example, as an overwrap or pallet wrap to protect goods during shipping and in food packaging applications (such as shrink wrap for frozen poultry).Type: ApplicationFiled: September 21, 2015Publication date: March 24, 2016Applicant: NOVA Chemicals (International) S.A.Inventors: XiaoChuan Wang, Peter Zoricak, Norman Dorien Joseph Aubee, Stephen John Brown
-
Publication number: 20150284303Abstract: A continuous flow process for the oligomerization of ethylene using a chromium catalyst having a phosphorus-nitrogen-phosphorus (“P—N—P”) ligand provides high selectivity to the desired tetramer (1-octene) with reduced production of coproduct C10+ oligomers. Prior art processes that maximize catalyst activity have provided comparatively poor product selectivity. In particular, the production of larger amounts of C10+ oligomers have been observed under conditions that maximize activity. The present process resolves this problem through the use of a combination of low catalyst concentration and by limiting the octene concentration in the reactor.Type: ApplicationFiled: December 4, 2013Publication date: October 8, 2015Applicant: NOVA Chemicals (International) S.A.Inventors: Peter Zoricak, Stephen John Brown, P. Scott Chisholm
-
Publication number: 20140142360Abstract: This invention enables the “bulk” oligomerization of ethylene (i.e. the oligomerization of ethylene in the presence of the oligomer product) using a catalyst system comprising 1) a very low concentration of a chromium catalyst and 2) a three part activator. The chromium catalyst contains a diphosphine ligand, preferably a so called P—N—P ligand. The activator includes an aluminoxane, trimethyl aluminum, and triethyl aluminum.Type: ApplicationFiled: July 25, 2012Publication date: May 22, 2014Applicant: NOVA CHEMICALS (INTERNATIONAL) S.A.Inventors: Stephen John Brown, Charles Ashton Garret Carter, P. Scott Chisholm, Peter Zoricak, Oleksiy Golovchenko
-
Patent number: 8431657Abstract: Catalysts are activated in a dual reactor solution process by adding substoichiometric and superstoichiometric amounts of an ionic activator to an organometallic polymerization catalyst in a first and second reactor respectively. The new activation method allows one to alter process conditions in a favorably way with minimum impact to process economics. The new activation method also provides polymers which give films having improved optical properties.Type: GrantFiled: November 23, 2011Date of Patent: April 30, 2013Assignee: Nova Chemicals (International) S.A.Inventors: XiaoChuan Wang, Peter Zoricak, Stephen John Brown
-
Publication number: 20120271087Abstract: The oligomerization of ethylene using a chromium catalyst and an aluminoxane activator is well known. The undesired formation of polyethylene as a by-product is also known to occur during prior oligomerization processes. We have discovered that the use of an aluminoxane that is prepared by non-hydrolytic means provides a highly productive activator (co-catalyst) for ethylene oligomerization and mitigates the undesired formation of by-product polyethylene.Type: ApplicationFiled: March 27, 2012Publication date: October 25, 2012Applicant: NOVA CHEMICALS (INTERNATIONAL) S.A.Inventors: Stephen John Brown, Charles Ashton Garret Carter, P. Scott Chisholm, Isam Jaber, Ian Ronald Jobe, Oleksiy Golovchenko
-
Publication number: 20120149856Abstract: Catalysts are activated in a dual reactor solution process by adding substoichiometric and superstoichiometric amounts of an ionic activator to an organometallic polymerization catalyst in a first and second reactor respectively. The new activation method allows one to alter process conditions in a favorably way with minimum impact to process economics. The new activation method also provides polymers which give films having improved optical properties.Type: ApplicationFiled: November 23, 2011Publication date: June 14, 2012Inventors: XiaoChuan Wang, Peter Zoricak, Stephen John Brown
-
Publication number: 20120142989Abstract: The oligomerization of ethylene using a chromium catalyst having a heteroatomic ligand may be used to provide oligomerization products that are selective towards hexene and/or octene. However, such processes also typically produce some polymer as an undesirable by product. The present invention is directed towards improvements in the selective oligomerization of ethylene.Type: ApplicationFiled: November 10, 2011Publication date: June 7, 2012Inventors: Isam Jaber, Ian Ronald Jobe, P. Scott Chisholm, Andrzej Krzywicki, Charles Ashton Garret Carter, Vernon Lindsay Strom, Kamal l Elias Serhal, Eric Clavelle, Stephen John Brown, Yves Lacombe, Anita Sylvia Magis, Mackenzie Alexander Harris, Russell Kirk Archer, Keith Wayne Besenski, Michel Berghmans, Oleksiy Golovchenko, Dale Alexander Sieben
-
Publication number: 20120101321Abstract: The oligomerization of ethylene using a chromium catalyst having a bridged diphosphine ligand can produce a selective product distribution (to predominantly hexene or predominantly octene/hexene) when activated with an aluminoxane. The oligomerization reaction also produces polymer by product—particularly when the aluminoxane is provided in a non-aromatic solvent. The present invention mitigates this problem.Type: ApplicationFiled: September 22, 2011Publication date: April 26, 2012Inventors: Stephen John Brown, Charles Ashton Garret Carter, P. Scott Chisholm, Isam Jaber
-
Patent number: 8101693Abstract: This invention relates to the polymerization of ethylene polymers using a continuously stirred tank reactor (CSTR) that is connected in series to a tubular reactor. The tubular reactor receives a polymer solution from the CSTR. Further polymerization in the tubular reactor improves production efficiencies, particularly with respect to lowering the amount of energy required to recover the polymer and residual comonomer from the solution. The use of tempered i.e. (heated) ethylene in the tubular reactor has been discovered to mitigate gel problems and lower/reduce levels of hexane extractables.Type: GrantFiled: December 6, 2010Date of Patent: January 24, 2012Assignee: NOVA Chemicals (International) S.A.Inventors: Lauwrence Martin Jozef Van Asseldonk, Stephen John Brown
-
Publication number: 20110144289Abstract: This invention relates to the polymerization of ethylene polymers using a continuously stirred tank reactor (CSTR) that is connected in series to a tubular reactor. The tubular reactor receives a polymer solution from the CSTR. Further polymerization in the tubular reactor improves production efficiencies, particularly with respect to lowering the amount of energy required to recover the polymer and residual comonomer from the solution. The use of tempered i.e. (heated) ethylene in the tubular reactor has been discovered to mitigate gel problems and lower/reduce levels of hexane extractables.Type: ApplicationFiled: December 6, 2010Publication date: June 16, 2011Inventors: Lauwrence Martin Jozef Van Asseldonk, Stephen John Brown
-
Publication number: 20100229426Abstract: A pair of shoes is provided that includes a left and a right shoe. The left shoe includes an upper having a left forefoot portion, the left forefoot portion having a lateral side with a portion thereof made of a first material and a medial side with a portion thereof made of a second material. The right shoe includes an upper having a right forefoot, the right forefoot having a medial side with a portion thereof made of the first material and a lateral side with a portion thereof made of the second material, wherein one of the first material and the second material provides more support than the other. The more supportive first material can include a polyurethane, such as TPU, a non-stretch synthetic material, or ceraprene. The second, less supportable material can be a light weight breathable mesh.Type: ApplicationFiled: March 15, 2010Publication date: September 16, 2010Applicant: NEW BALANCE ATHLETIC SHOE, INC.Inventor: Stephen John Brown