Patents by Inventor Moses Olukayode Jejelowo
Moses Olukayode Jejelowo 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).
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Patent number: 8227564Abstract: The invention provides for ethylene copolymers having a polymodal CD, wherein under temperature rising elution fractionation (TREF) analysis the ethylene copolymers evidence at least two peaks.Type: GrantFiled: October 26, 2007Date of Patent: July 24, 2012Assignee: Univation Technologies, LLCInventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
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Patent number: 7829495Abstract: The invention comprises an olefin polymerization process comprising contacting ethylene alone or with one or more olefinically unsaturated comonomers with a Group 3-6 metallocene catalyst compound comprising one ?-bonded ring having a C3 or greater hydrocarbyl, hydrocarbylsilyl or hydrocarbylgermyl substituent said substituent bonded to the ring through a primary carbon atom; and, where the compound contains two ?-bonded rings, the total number of substituents on the rings is equal to a number from 3 to 10, said rings being asymmetrically substituted where the number of substituents is 3 or 4. The invention process is particularly suitable for preparing ethylene copolymers having an MIR less than about 35, while retaining narrow CD even at high comonomer incorporation rates, and with certain embodiments providing ethylene copolymers having improved melt strength with the low MIR.Type: GrantFiled: August 31, 2004Date of Patent: November 9, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Joseph C. Floyd, Moses Olukayode Jejelowo, Donna Jean Crowther, George Alan Vaughan, Ching Tai Lue
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Publication number: 20080214753Abstract: A catalyst system comprising a hafnocene catalyst compound and zirconocene catalyst compound, wherein the hafnocene and/or zirconocene include(s) at least one ligand substituted with at least one linear or iso alkyl group having 3 or more carbon atoms is provided. A process for polymerizing olefin(s) using the same catalyst system is also provided.Type: ApplicationFiled: April 17, 2008Publication date: September 4, 2008Applicant: UNIVATION TECHNOLOGIES, LLCInventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
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Patent number: 7381783Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalyst of the invention, in particular a single reactor polymerization process.Type: GrantFiled: July 1, 2004Date of Patent: June 3, 2008Assignee: Univation Technologies, LLCInventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
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Publication number: 20040249091Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalyst of the invention, in particular a single reactor polymerization process.Type: ApplicationFiled: July 1, 2004Publication date: December 9, 2004Inventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
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Patent number: 6800704Abstract: The invention comprises an olefin polymerization process comprising contacting ethylene alone or with one or more olefinically unsaturated comonomers with a Group 3-6 metallocene catalyst compound comprising one &pgr;-bonded ring having a C3 or greater hydrocarbyl, hydrocarbylsilyl or hydrocarbylgermyl substituent said substituent bonded to the ring through a primary carbon atom; and, where the compound contains two &pgr;-bonded rings, the total number of substituents on the rings is equal to a number from 3 to 10, said rings being asymmetrically substituted where the number of substituents is 3 or 4. The invention process is particularly suitable for preparing ethylene copolymers having an MIR less than about 35, while retaining narrow CD even at high comonomer incorporation rates, and with certain embodiments providing ethylene copolymers having improved melt strength with the low MIR.Type: GrantFiled: April 22, 2002Date of Patent: October 5, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Joseph C. Floyd, Moses Olukayode Jejelowo, Donna Jean Crowther, George Alan Vaughan, Ching Tai Lue
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Patent number: 6759499Abstract: The invention comprises an olefin polymerization process comprising contacting ethylene alone or with one or more olefinically unsaturated comonomers with a Group 3-6 metallocene catalyst compound comprising one &pgr;-bonded ring having a C3 or greater hydrocarbyl, hydrocarbylsilyl or hydrocarbylgermyl substituent said substituent bonded to the ring through a primary carbon atom; and, where the compound contains two &pgr;-bonded rings, the total number of substituents on the rings is equal to a number from 3 to 10, said rings being asymmetrically substituted where the number of substituents is 3 or 4. The invention process is particularly suitable for preparing ethylene copolymers having an MIR less than about 35, while retaining narrow CD even at high comonomer incorporation rates, and with certain embodiments providing ethylene copolymers having improved melt strength with the low MIR.Type: GrantFiled: September 21, 1999Date of Patent: July 6, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Joseph C. Floyd, Moses Olukayode Jejelowo, Donna Jean Crowther, George Alan Vaughan, Ching Tai Lue
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Publication number: 20040097365Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalyst of the invention, in particular a single reactor polymerization process.Type: ApplicationFiled: October 29, 2003Publication date: May 20, 2004Inventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
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Patent number: 6608000Abstract: The invention generally relates to a metallocene-based, olefin polymerization catalyst system. The easily processible polymer product has a broad molecular weight distribution, a high molecular weight, and a narrow composition distribution. The catalyst system comprises a first component with a Group-4-6 metal bonded to cyclopentadienyl-containing rings having at least two substituents bonded to the rings in the same position; a second component comprising a Group-4-6 metal bonded to cyclopentadienyl-containing rings having at least two substituents bonded to the rings; and a third component comprising a Group-4-6 metal bonded to cyclopentadienyl-containing rings where one of the rings is substituted identically to the first component and another is substituted identically to the second component. When the substituents of the first and second components are the same, they are bonded to the first component rings at positions different from the bonding positions of the second component rings.Type: GrantFiled: September 13, 2000Date of Patent: August 19, 2003Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert Lee Bamberger, Moses Olukayode Jejelowo
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Patent number: 6528597Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalysts of the invention, in particular a single reactor polymerization process.Type: GrantFiled: March 14, 2001Date of Patent: March 4, 2003Assignee: Univation Technologies, LLCInventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
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Patent number: 6518215Abstract: The invention generally relates to a catalyst, particularly a metallocene catalyst and catalyst system useful in the polymerization of olefins into a polymer product. The polymer product has a broad molecular weight distribution, a high molecular weight and a narrow composition distribution and is easily processable.Type: GrantFiled: November 17, 2000Date of Patent: February 11, 2003Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert Lee Bamberger, Moses Olukayode Jejelowo
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Patent number: 6489413Abstract: The invention comprises an olefin polymerization process comprising contacting ethylene alone or with one or more olefinically unsaturated comonomers with a Group 3-6 metallocene catalyst compound comprising one &pgr;-bonded ring having a C3 or greater hydrocarbyl, hydrocarbylsilyl or hydrocarbylgermyl substituent said substituent bonded to the ring through a primary carbon atom; and, where the compound contains two &pgr;-bonded rings, the total number of substituents on the rings is equal to a number from 3 to 10, said rings being asymmetrically substituted where the number of substituents is 3 or 4. The invention process is particularly suitable for preparing ethylene copolymers having an MIR less than about 35, while retaining narrow CD even at high comonomer incorporation rates, and with certain embodiments providing ethylene copolymers having improved melt strength with the low MIR.Type: GrantFiled: July 13, 2000Date of Patent: December 3, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Joseph C. Floyd, Moses Olukayode Jejelowo, Donna Jean Crowther, George Alan Vaughan, Ching Tai Lue
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Publication number: 20020156208Abstract: The invention comprises an olefin polymerization process comprising contacting ethylene alone or with one or more olefinically unsaturated comonomers with a Group 3-6 metallocene catalyst compound comprising one &pgr;-bonded ring having a C3 or greater hydrocarbyl, hydrocarbylsilyl or hydrocarbylgermyl substituent said substituent bonded to the ring through a primary carbon atom; and, where the compound contains two &pgr;-bonded rings, the total number of substituents on the rings is equal to a number from 3 to 10, said rings being asymmetrically substituted where the number of substituents is 3 or 4. The invention process is particularly suitable for preparing ethylene copolymers having an MIR less than about 35, while retaining narrow CD even at high comonomer incorporation rates, and with certain embodiments providing ethylene copolymers having improved melt strength with the low MIR.Type: ApplicationFiled: April 22, 2002Publication date: October 24, 2002Inventors: Joseph C. Floyd, Moses Olukayode Jejelowo, Donna Jean Crowther, George Alan Vaughan, Ching Tai Lue
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Patent number: 6384158Abstract: The catalyst system of the invention comprises: I) a catalyst for polymerizing olefins comprising: a) a first component comprising at least one transition metal of Group IV, V or VI and at least two cyclopentadienyl containing rings, said rings each having at least two substituents bonded to each of said rings in the same position; b) a second component comprising said transition metal and said cyclopentadienyl containing rings, said rings each having at least two substituents bonded to each of said rings in the same or different position than said substituents of said first component; said substituents of the said first and second components can be the same or different, with the provision that when the substituents of said first and second components are the same, said substituents of said components are bonded to said rings in different positions; and c) a third component comprising said transition metal bonded to said cyclopentadienyl containing rings where one of said rings is substituted identicallyType: GrantFiled: September 13, 2000Date of Patent: May 7, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert Lee Bamberger, Moses Olukayode Jejelowo
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Publication number: 20020040114Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalysts of the invention, in particular a single reactor polymerization process.Type: ApplicationFiled: March 14, 2001Publication date: April 4, 2002Inventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
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Publication number: 20010031698Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalysts of the invention, in particular a single reactor polymerization process.Type: ApplicationFiled: March 14, 2001Publication date: October 18, 2001Inventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
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Publication number: 20010020074Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator.Type: ApplicationFiled: March 14, 2001Publication date: September 6, 2001Applicant: Exxon Chemical Patents, Inc.Inventors: Moses Olukayode Jejelowo, Sun-Chueh Kao
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Publication number: 20010018505Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator.Type: ApplicationFiled: March 14, 2001Publication date: August 30, 2001Inventors: Moses Olukayode Jejelowo, Sun Chueh Kao
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Patent number: 6248845Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalysts of the invention, in particular a single reactor polymerization process. The hafnocene compound comprises at least one ligand substituted with at least one linear or iso alkyl substituent of at least 3 carbon atoms, and the catalyst system may comprise a mixture of two or more such hafnocenes.Type: GrantFiled: December 8, 1998Date of Patent: June 19, 2001Assignee: Univation TechnologiesInventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
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Patent number: 6242545Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The hafnocene comprises at least one cyclopentadienyl ligand including at least one linear or isoalkyl substituent of at least 3 carbon atoms.Type: GrantFiled: December 8, 1997Date of Patent: June 5, 2001Assignee: Univation TechnologiesInventors: Moses Olukayode Jejelowo, Sun-Chueh Kao