Patents by Inventor Dongmei Cui

Dongmei Cui 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: 20210076207
    Abstract: In one example method for generating an access stratum key in a communication system, a terminal device acquires an input parameter, where the terminal device is communicably coupled to a first network-side device through a first air interface and at the same time is communicably coupled to a second network-side device through a second air interface. The terminal device has access to a core network via the first network-side device, and has access to the core network via the second network-side device which has access to the core network through the first network-side device. The terminal device calculates an access stratum root key of the second air interface according to the input parameter and an access stratum root key of the first air interface, and generates an access stratum key of the second air interface according to the access stratum root key of the second air interface.
    Type: Application
    Filed: November 20, 2020
    Publication date: March 11, 2021
    Inventors: Dongmei ZHANG, Jing CHEN, Yang CUI
  • Patent number: 10888109
    Abstract: Provided herein are bacterial strains that are capable of degrading nitrite and/or TSNAs. Also provided herein are methods of using such bacterial strains to degrade nitrite and/or TSNAs.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: January 12, 2021
    Assignee: Altria Client Services LLC
    Inventors: Ujwala Warek, Mark T. Nielsen, Dongmei Xu, Mingwu Cui, Xue Luo, Xiaohong Jin, Elisabeth Miller, Kwang Choi
  • Patent number: 10880738
    Abstract: In one embodiment, a system for generating an access stratum key comprises: a first network-side device that has access to a core network (CN) and is communicably coupled to a user equipment device (UE) through a first air interface, and a second network-side device that has access to the CN through the first network-side device and is communicably coupled to the UE through a second air interface. The first network-side device is configured to calculate an access stratum root key of the second network-side device according to an access stratum root key of the first network-side device and an input parameter; and send the access stratum root key of the second network-side device to the second network-side device. The second network-side device is configured to receive the access stratum root key of the second network-side device from the first network-side device; and generate an access stratum key according to the access stratum root key of the second network-side device.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: December 29, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Dongmei Zhang, Jing Chen, Yang Cui
  • Patent number: 10683380
    Abstract: A copolymer of ethylene and a conjugated diene is provided, in which ethylene content in the copolymer is greater than 20 mol %, the copolymer has a glass transition temperature between ?110° C. and ?90° C., and continuous methylene sequence lengths (MSL) in the copolymer are in a range of 12-162 methylene units.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: June 16, 2020
    Assignee: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Chunji Wu, Bo Liu, Dongmei Cui
  • Publication number: 20190330536
    Abstract: Provided is a conversion process for an organic oil, relating to the field of biomass utilization, energy and chemical industry. The conversion process is carried out in presence of an aqueous slurry and a catalyst selected from the group consisting of an iron oxide compound, a waste agent resulting from use of an iron oxide compound as desulfurizer, and a regeneration product of the waste agent, under a controlled molar ratio of iron element to sulfur element. It is found that free radical condensation polymerization of organic oil during cracking process can be blocked effectively by using carbonylation, and hydrogenation is achieved with active hydrogen produced from the conversion of CO and water. In the conversion process, organic material, especially biomass solid, can be directly converted without dehydration, and water can be additionally added to the biomass liquid or the mineral oil.
    Type: Application
    Filed: May 30, 2019
    Publication date: October 31, 2019
    Inventors: Ke LIN, Lixin GUO, Yongjun CUI, Shengfeng LI, Dongmei CUI
  • Publication number: 20190281029
    Abstract: In one embodiment, a system for generating an access stratum key comprises: a first network-side device that has access to a core network (CN) and is communicably coupled to a user equipment device (UE) through a first air interface, and a second network-side device that has access to the CN through the first network-side device and is communicably coupled to the UE through a second air interface. The first network-side device is configured to calculate an access stratum root key of the second network-side device according to an access stratum root key of the first network-side device and an input parameter; and send the access stratum root key of the second network-side device to the second network-side device. The second network-side device is configured to receive the access stratum root key of the second network-side device from the first network-side device; and generate an access stratum key according to the access stratum root key of the second network-side device.
    Type: Application
    Filed: May 30, 2019
    Publication date: September 12, 2019
    Inventors: Dongmei Zhang, Jing Chen, Yang Cui
  • Publication number: 20190218328
    Abstract: A copolymer of ethylene and a conjugated diene is provided, in which ethylene content in the copolymer is greater than 20 mol %, the copolymer has a glass transition temperature between ?110° C. and ?90° C., and continuous methylene sequence lengths (MSL) in the copolymer are in a range of 12-162 methylene units.
    Type: Application
    Filed: March 25, 2019
    Publication date: July 18, 2019
    Inventors: Chunji Wu, Bo Liu, Dongmei Cui
  • Patent number: 10348703
    Abstract: In the communications system, a user equipment UE accesses a core network via a first network-side device by using a first air interface and connects to the first network-side device via a second network-side device by using a second air interface to access the core network. The method includes: acquiring, by the network-side device, an input parameter; calculating, by the network-side device, an access stratum root key KeNB* according to the input parameter and an access stratum root key KeNB on the first air interface, or using, by the network-side device, the KeNB as the KeNB*; and generating, by the second network-side device, an access stratum key on the second air interface according to the KeNB*, or sending, by the first network-side device, the KeNB* to the second network-side device.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: July 9, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Dongmei Zhang, Jing Chen, Yang Cui
  • Publication number: 20190200668
    Abstract: Provided herein are bacterial strains that are capable of degrading nitrite and/or TSNAs. Also provided herein are methods of using such bacterial strains to degrade nitrite and/or TSNAs.
    Type: Application
    Filed: January 15, 2019
    Publication date: July 4, 2019
    Applicant: Altria Client Services LLC
    Inventors: Ujwala Warek, Mark T. Nielsen, Dongmei Xu, Mingwu Cui, Xue Luo, Xiaohong Jin, Elisabeth Miller, Kwang Choi
  • Patent number: 10280243
    Abstract: A copolymer of ethylene and a conjugated diene is provided, in which ethylene content in the copolymer is greater than 20 mol %, the copolymer has a glass transition temperature between ?110° C. and ?90° C., and continuous methylene sequence lengths (MSL) in the copolymer are in a range of 12-162 methylene units.
    Type: Grant
    Filed: September 30, 2017
    Date of Patent: May 7, 2019
    Assignee: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Chunji Wu, Bo Liu, Dongmei Cui
  • Patent number: 10246536
    Abstract: Compared to the prior art, this invention provides a functionalized highly syndiotactic polystyrene, comprising a repeating unit having a structure represented by formula (I), or comprising a repeating unit having a structure represented by formula (I) and a repeating unit having a structure represented by formula (II). It is indicated by the experimental results that the syndiotacticity selectivity of the highly syndiotactic polymer provided by this invention is no less than 90%, and the proportion of the repeating unit having a structure represented by formula (I) in the polymer may be arbitrarily adjusted and may be up to 100%. Meanwhile, the oxygen- or sulfur-containing groups in the polymer may increase the polarity of the highly syndiotactic polystyrene so as to increase the blendability of the highly syndiotactic polystyrene with other polymers.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: April 2, 2019
    Assignee: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Dongmei Cui, Dongtao Liu, Zichuan Wang
  • Publication number: 20180291131
    Abstract: A copolymer of ethylene and a conjugated diene is provided, in which ethylene content in the copolymer is greater than 20 mol %, the copolymer has a glass transition temperature between ?110° C. and ?90° C., and continuous methylene sequence lengths (MSL) in the copolymer are in a range of 12-162 methylene units.
    Type: Application
    Filed: September 30, 2017
    Publication date: October 11, 2018
    Inventors: Chunji Wu, Bo Liu, Dongmei Cui
  • Patent number: 9896519
    Abstract: This invention provides a metallocene complex and the preparation method thereof and a catalyst composition. This catalyst composition comprises a metallocene complex represented by formula (I) and an organic boron salt. Compared to the prior art, the catalyst used in this invention, which is the metallocene complex represented by formula (I), does not contain a group bonding between the heterocyclic fused cyclopentadienyl ring and the transition metal, and the coordination space of the central metal has a large opening degree. Therefore, the catalytic activity for more sterically hindered monomers is higher, and the comonomer incorporation is also higher. Furthermore, the metallocene complex represented by formula (I) used in this invention is a heterocyclic ring fused cyclopentadienyl ligand. Heterocyclic rings have relatively strong electron-donating capacity.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: February 20, 2018
    Assignee: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Dongmei Cui, Chunji Wu, Changguang Yao
  • Publication number: 20170335036
    Abstract: Compared to the prior art, this invention provides a functionalized highly syndiotactic polystyrene, comprising a repeating unit having a structure represented by formula (I), or comprising a repeating unit having a structure represented by formula (I) and a repeating unit having a structure represented by formula (II). It is indicated by the experimental results that the syndiotacticity selectivity of the highly syndiotactic polymer provided by this invention is no less than 90%, and the proportion of the repeating unit having a structure represented by formula (I) in the polymer may be arbitrarily adjusted and may be up to 100%. Meanwhile, the oxygen- or sulfur-containing groups in the polymer may increase the polarity of the highly syndiotactic polystyrene so as to increase the blendability of the highly syndiotactic polystyrene with other polymers.
    Type: Application
    Filed: August 13, 2015
    Publication date: November 23, 2017
    Inventors: Dongmei Cui, Dongtao Liu, Zichuan Wang
  • Patent number: 9676904
    Abstract: The invention provides a metal alkoxide complex of Formula (I), wherein X, M, R1, R2, R3, m, n, y and z are as defined in the Description. The invention also provides a catalyst composition comprising the metal alkoxide complex and a hydroxy-containing compound, wherein the molar ratio of the metal alkoxide complex to the hydroxy-containing compound is 1:0.1-1000. The invention also provides a production method of poly-?-caprolactone or polyactide, wherein an ?-caprolactone monomer or a lactide monomer is reacted in the presence of the metal alkoxide complex or catalyst composition to obtain poly-?-caprolactone or polylactide. The metal alkoxide complex and the catalyst composition thereof can be used to catalyze the synthesis of poly-?-caprolactone or polylactide with a high efficiency.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: June 13, 2017
    Assignee: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Dongmei Cui, Xinli Liu, Bo Liu, Shihui Li, Dongtao Liu, Chunji Wu
  • Publication number: 20160229928
    Abstract: This invention provides a metallocene complex and the preparation method thereof and a catalyst composition. This catalyst composition comprises a metallocene complex represented by formula (I) and an organic boron salt. Compared to the prior art, the catalyst used in this invention, which is the metallocene complex represented by formula (I), does not contain any side chain, and the coordination space of the central metal has a large opening degree. Therefore, the catalytic activity for more sterically hindered monomers is higher, and the comonomer incorporation is also higher. Furthermore, the metallocene complex represented by formula (I) used in this invention is a heterocyclic ring fused cyclopentadienyl ligand. Heterocyclic rings have relatively strong electron-donating capacity. By fusing a cyclopentadienyl group using heterocyclic rings, it is possible to change the electronic effect of the metal center and in turn increase the activity of catalyst.
    Type: Application
    Filed: November 11, 2013
    Publication date: August 11, 2016
    Applicant: Changchun Institute of Chemistry, Chinese Academy of Sciences
    Inventors: Dongmei Cui, Chunji Wu, Changguang Yao
  • Publication number: 20140364580
    Abstract: The invention provides a metal alkoxide complex of Formula (I), wherein X, M, R1, R2, R3, m, n, y and z are as defined in the Description. The invention also provides a catalyst composition comprising the metal alkoxide complex and a hydroxy-containing compound, wherein the molar ratio of the metal alkoxide complex to the hydroxy-containing compound is 1:01-1000. The invention also provides a production method of poly-?- caprolactone or polyactide, wherein an ?-caprolactone monomer or a lactide monomer is reacted in the presence of the metal alkoxide complex or catalyst composition to obtain poly-?-caprolactone or polylactide. The metal alkoxide complex and the catalyst composition thereof can be used to catalyze the synthesis of poly-?- caprolactone or polylactide with a high efficiency.
    Type: Application
    Filed: September 11, 2012
    Publication date: December 11, 2014
    Applicant: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Dongmei Cui, Xinli Liu, Bo Liu, Shihui Li, Dongtao Liu, Chunji Wu
  • Patent number: 8394901
    Abstract: An isoprene or butadiene cis 1,4-selective polymerization catalyst system together with its polymerization method is provided. This catalyst system is composed of NCN-imine pincer type rare earth metal complex of formula [2,6-(CH?N—R1)2-4-R2-1-C6H2]LnX2(THF)n and alkylating reagent. In an hydrocarbon solvent or under bulk conditions, at a polymerization temperature in a range of ?20-120° C., the conjugated diene is polymerized by using the catalyst system, to produce polyisoprene and polybutadiene having controllable number-average molecular weight, molecular weight distribution of 3.0 or less than, and cis 1,4-content of 95% or more, even 99% or more. The crude rubber and vulcanized rubber of the polyisoprene have high strength, stretching crystallization capability and transparency.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: March 12, 2013
    Assignee: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Dongmei Cui, Xinli Liu, Dongtao Liu, Wei Gao, Shihui Li, Lingfang Wang, Zhichao Zhang
  • Publication number: 20100286350
    Abstract: An isoprene or butadiene cis 1,4-selective polymerization catalyst system together with its polymerization method is provided. This catalyst system is composed of NCN-imine pincer type rare earth metal complex of formula [2,6-(CH?N—R1)2-4-R2-1-C6H2]LnX2(THF)n and alkylating reagent. In an hydrocarbon solvent or under bulk conditions, at a polymerization temperature in a range of ?20-120° C., the conjugated diene is polymerized by using the catalyst system, to produce polyisoprene and polybutadiene having controllable number-average molecular weight, molecular weight distribution of 3.0 or less than, and cis 1,4-content of 95% or more, even 99% or more. The crude rubber and vulcanized rubber of the polyisoprene have high strength, stretching crystallization capability and transparency.
    Type: Application
    Filed: April 28, 2009
    Publication date: November 11, 2010
    Inventors: Dongmei Cui, Xinli Liu, Dongtao Liu, Wei Gao, Shihui Li, Lingfang Wang, Zhichao Zhang