Patents by Inventor Norman Yang
Norman Yang 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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Publication number: 20240119991Abstract: In an embodiment, a memory controller in an integrated circuit may generate refreshes for one or more DRAMs coupled to the integrated circuit according to a refresh rate. The integrated circuit may include one or more temperature sensors. A rate of change of the temperature may be determined from the temperature sensors. If the rate is greater than a threshold, the memory controller may generate refreshes according to a refresh rate specified by the DRAMs. If the rate is less than the threshold, the memory controller may generate refreshes at a reduced refresh rate.Type: ApplicationFiled: October 17, 2023Publication date: April 11, 2024Inventors: Liang Deng, Norman J. Rohrer, Yizhang Yang, Arpit Mittal
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Patent number: 10421921Abstract: This invention discloses an improved process which employs mixed alpha-olefins as feed over activated metallocene catalyst systems to provide essentially random liquid polymers particularly useful in lubricant components or as functional fluidsType: GrantFiled: January 30, 2017Date of Patent: September 24, 2019Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret M. Wu, Norman Yang, Phil Surana, Anura Patil, Steven P. Rucker, Kuangnan Qian, Shakeel Tirmizi, Mark P. Hagemeister
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Publication number: 20170137737Abstract: This invention discloses an improved process which employs mixed alpha-olefins as feed over activated metallocene catalyst systems to provide essentially random liquid polymers particularly useful in lubricant components or as functional fluidsType: ApplicationFiled: January 30, 2017Publication date: May 18, 2017Inventors: Margaret M. Wu, Norman Yang, Phil Surana, Anura Patil, Steven P. Rucker, Kuangnan Qian, Shakeel Tirmizi, Mark P. Hagemeister
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Patent number: 9593288Abstract: This invention discloses an improved process which employs mixed alpha-olefins as feed over activated metallocene catalyst systems to provide essentially random liquid polymers particularly useful in lubricant components or as functional fluids.Type: GrantFiled: November 18, 2014Date of Patent: March 14, 2017Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret M. Wu, Norman Yang, Phil Surana, Anura Patil, Steven P. Rucker, Kuangnan Qian, Shakeel Tirmizi, Mark P. Hagemeister
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Patent number: 9365663Abstract: The invention is directed to a process for the preparation of high viscosity lubricant base stocks by contacting alphaolefin feedstocks with single-site metallocene catalysts in a mixed flow or continuous stirred tank reactors.Type: GrantFiled: February 19, 2009Date of Patent: June 14, 2016Assignee: ExxonMobil Chemical Patents Inc.Inventors: Mark Paul Hagemeister, Peijun Jiang, Margaret M. Wu, Norman Yang
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Publication number: 20150252279Abstract: This invention discloses an improved process which employs mixed alpha-olefins as feed over activated metallocene catalyst systems to provide essentially random liquid polymers particularly useful in lubricant components or as functional fluidsType: ApplicationFiled: November 18, 2014Publication date: September 10, 2015Inventors: Margaret M. Wu, Norman Yang, Phil Surana, Anura Patil, Steven P. Rucker, Kuangnan Qian, Shakeel Tirmizi, Mark P. Hagemeister
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Patent number: 8921291Abstract: This invention discloses an improved process which employs mixed alpha-olefins as feed over activated metallocene catalyst systems to provide essentially random liquid polymers particularly useful in lubricant components or as functional fluids.Type: GrantFiled: July 14, 2006Date of Patent: December 30, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret M. Wu, Norman Yang, Phil Surana, Anura Patil, Steven P. Rucker, Kuangnan Qian, Shakeel Tirmizi, Mark P. Hagemeister
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Publication number: 20140378720Abstract: A process to produce polyalpha-olefins includes contacting a feed stream of at least one alpha-olefin monomer having 4 to 25 carbon atoms with a metallocene catalyst compound and an activator, and optionally an alkyl-aluminum compound, under polymerizations conditions in a reactor. The alpha-olefin monomer is present at 10% volume or more in the reactor and the feed stream includes less than 600 ppm of heteroatom containing compounds. The process further includes obtaining a polyalpha-olefin with at least 50 mole % C5 to C24 alpha-olefin monomer and kinematic viscosity at 100° C. of 5000 cSt or less.Type: ApplicationFiled: May 6, 2014Publication date: December 25, 2014Inventors: Margaret M. Wu, Norman Yang, Lisa S. Baugh, Jo Ann M. Canich, Steven P. Rucker, John F. Walzer, JR., Gordon H. Lee, Frederick Y. Lo, Andrew Jackson, Mark P. Hagemeister, Shakeel Tirmizi, Peijun Jiang, Chia S. Chee
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Patent number: 8865959Abstract: A process for the preparation of oligomeric poly alpha-olefins includes oligomerizing low molecular weight PAO oligomer in the presence of a Lewis acid catalyst such as promoted aluminum trichloride or boron trifluoride under oligomerization conditions. The low molecular weight PAO oligomers used as a feed or feed component of the present process are the light olefinic by-product fractions including the dimers and light fractions from the metallocene-catalyzed PAO oligomerization process which are characterized by a molecular weight of 150 to 600 and a terminal olefin (vinylidene) content of at least 25%.Type: GrantFiled: March 4, 2009Date of Patent: October 21, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Abhimanyu Onkar Patil, Margaret May-Som Wu, Norman Yang
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Patent number: 8748361Abstract: This invention relates to a polyalpha-olefin (and hydrogenated analogs thereof) comprising more than 50 mole % of one or more C5 to C24 alpha-olefin monomers where the polyalpha-olefin has: a) 40 mole % or more of mm triads, b) a Bromine number of Y or greater, where Y is equal to 89.92*(V)?°5863, where V is the Kinematic Viscosity of the polyalpha-olefin measured at 100° C. in cSt, and c) 1,2 disubstituted olefins present at 7 mole % or more, preferably having Z mole % or more of units represented by the formula: where j, k and m are each, independently, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, or 22, n is an integer from 1 to 350, and where Z=8.420*Log(V)?4.048, where V is the kinematic viscosity of the polyalpha-olefin measured at 1000 C in cSt This invention also relates to process to produce such polyalpha-olefins.Type: GrantFiled: June 2, 2006Date of Patent: June 10, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret May-Som Wu, Lisa Saunders Baugh, Jo Ann Marie Canich, Chia Shian Chee, Mark Paul Hagemeister, Andrew Jackson, Peijun Jiang, Gordon H. Lee, Frederick Yip-Kwai Lo, Steven P. Rucker, Shakeel Tirmizi, John F. Walzer, Jr., Norman Yang
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Patent number: 8598394Abstract: The present invention relates to poly alpha-olefins (PAO's) which exhibit superior Noack volatility at low pour points. The poly alpha-olefin is prepared from an olefin feed comprised of a blend of octene, decene, and dodecene, the feed comprising at least 10 weight % octene and at least 30 weight % dodecene. The process includes both synthesis and distillation of the olefin and oligomerization olefin. The oligomerized olefin feed yields at least 50% low viscosity PAO having a nominal viscosity at 100° C. of about 4 cSt.Type: GrantFiled: June 30, 2008Date of Patent: December 3, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: Maria Caridad Brillantes Goze, Phil Surana, Norman Yang
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Patent number: 8513478Abstract: Liquid poly-alpha-olefins having a KV100 of 2 to 6000 cSt, 20 weight percent dimer or less and a viscosity index of 60 or more are obtained by contacting in a reaction zone, in the presence of from 0 to 60 psi hydrogen, C3 to C20 alpha-olefin monomers with a non-coordinating anion activator, a single bridged meso-metallocene transition metal compound having less than about 35 wt % racemic isomer, and a co-activator. The molar ratio of activator to meso-metallocene is from 10:1 to 0.1:1, and the alpha-olefin monomers in the feed components are present in at least 20 wt % or more based upon the weight of the meso-metallocene, non-coordinating anion activator, co-activator, monomers, and solvent or diluent. The productivity of the process is at least 50,000 g of total product per gram of transition metal compound and no more than 5% monomer is converted from olefin to alkane.Type: GrantFiled: August 1, 2007Date of Patent: August 20, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret M. Wu, Mark P. Hagemeister, Norman Yang
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Patent number: 8399390Abstract: The invention relates to industrial lubricant and grease compositions containing high viscosity index polyalphaolefins (HVI-PAO). The use of HVI-PAOs in industrial oils and greases application provides advantages in improved shear stability, wear property, foam property, energy efficiency and improved overall performance.Type: GrantFiled: June 29, 2005Date of Patent: March 19, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret May-Som Wu, Andrew Jackson, Walter David Vann, James Thomas Carey, Norman Yang, Suzzy Chen Hsi Ho
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Patent number: 8211968Abstract: The present invention relates to plasticized polyolefin compositions comprising a polyolefin and a non-functionalized hydrocarbon plasticizer.Type: GrantFiled: January 25, 2010Date of Patent: July 3, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Henry Wu-Hsiang Yang, Wen Li, Bruce R. Lundmark, Chon-Yie Lin, Chia Yung Cheng, Bryan R. Chapman, Petra Eiselt, Galina Ourieva, Manika Varma-Nair, James N. Coffey, Sandra Denise Schregenberger, David J. Lohse, Norman Yang, Jeffrey Theodore Zudock, Robert Jay Wittenbrink
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Patent number: 8071835Abstract: The invention is directed to a process for producing polyolefins by one or more homogeneous or colloidal polymerization catalyst wherein residual catalyst is removed by using a solid sorbent.Type: GrantFiled: April 26, 2007Date of Patent: December 6, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret May-Som Wu, Norman Yang, Mark Paul Hagemeister, Shakeel Tirmizi
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Publication number: 20110137091Abstract: In oligomerizing alpha-olefins to produce poly alpha-olefins, the feedstock consists of nonene, or a blend of alpha-olefins comprising nonene. The nonene comprising alpha-olefin feedstock and at least one catalyst are subjected to oligomerization or polymerization conditions in a reactor. Following reaction, the mixture may be subjected to distillations to removed unreacted alpha-olefins and dimers of the alpha-olefins. The resulting product may also be hydrogenated. The final product may also be fractioned to recover at least two fractions of poly alpha-olefins of differing nominal viscosities.Type: ApplicationFiled: November 8, 2010Publication date: June 9, 2011Inventors: Norman Yang, Phillip T. Matsunaga, Maria C.B. Goze
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Publication number: 20100292424Abstract: This invention discloses an improved process which employs mixed alpha-olefins as feed over activated metallocene catalyst systems to provide essentially random liquid polymers particularly useful in lubricant components or as functional fluids.Type: ApplicationFiled: July 14, 2006Publication date: November 18, 2010Inventors: Margaret M. Wu, Norman Yang, Phil Surana, Anura Patil, Steven P. Rucker, Kuangnan Qian, Shakeel Tirmizi, Mark P. Hagemeister
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Publication number: 20100152346Abstract: The present invention relates to plasticized polyolefin compositions comprising a polyolefin and a non-functionalized hydrocarbon plasticizer.Type: ApplicationFiled: January 25, 2010Publication date: June 17, 2010Inventors: Henry Wu-Hsiang Yang, Wen Li, Bruce R. Lundmark, Chon-Yie Lin, Chia Yung Cheng, Bryan R. Chapman, Petra Eiselt, Galina Ourieva, Manika Varma-Nair, James N. Coffey, Sandra Denise Schregenberger, David J. Lohse, Norman Yang, Jeffrey Theodore Zudock, Robert Jay Wittenbrink
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Patent number: 7652185Abstract: A process for reducing boron trifluoride usage and emissions associated with PAO manufacture, the process comprising distilling a portion of the crude PAO product containing a boron trifluoride-organic catalyst at a temperature sufficient to cause the boron trifluoride-organic catalyst to dissociate to produce an overhead stream comprising uncomplexed boron trifluoride and an uncomplexed organic catalyst component, contacting the uncomplexed boron trifluoride and uncomplexed organic catalyst component in a condenser column having an internal structure that increases the recombination of the uncomplexed boron trifluoride and uncomplexed organic catalyst component to form a recycle boron trifluoride-organic catalyst.Type: GrantFiled: August 17, 2004Date of Patent: January 26, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Norman Yang, Shakeel Tirmizi
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Patent number: 7652093Abstract: The present invention relates to plasticized polyolefin compositions comprising a polyolefin and a non-functionalized hydrocarbon plasticizer.Type: GrantFiled: April 19, 2006Date of Patent: January 26, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Henry Wu-Hsiang Yang, Wen Li, Bruce R. Lundmark, Chon-Yie Lin, Chia Yung Cheng, Bryan R. Chapman, Petra Eiselt, Galina Ourieva, Manika Varma-Nair, James N. Coffey, Sandra Denise Schregenberger, David J. Lohse, Norman Yang, Jeffrey Theodore Zudock, Robert Jay Wittenbrink