Patents by Inventor Xiaohua Ma

Xiaohua Ma 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: 20240128436
    Abstract: A negative electrode composition includes a silicon containing material and a crosslinked polymer containing coating surrounding at least a portion of the silicon containing material. The crosslinked polymer containing coating comprises a (co)polymer derived from polymerization of one or more vinylic monomers comprising a carboxyl or carboxylate group.
    Type: Application
    Filed: December 26, 2023
    Publication date: April 18, 2024
    Inventors: Tianyu Wu, Mark J. Pellerite, Kevin W. Eberman, Xiaohua Ma, Li Liu
  • Publication number: 20240060919
    Abstract: A chemical reaction hazard analysis method is disclosed. Safety data and preventive measures of a chemical reaction are obtained through analysis of material stability, reaction process hazards and reaction runaway. The method can shorten a distance from laboratory to industrialization and realize an organic combination and application of technology, safety and engineer. The data obtain by the method can provide underlying basic data for process design, engineer amplification and the like, and lay a foundation for realizing process safety, improving quality and increasing efficiency.
    Type: Application
    Filed: August 16, 2023
    Publication date: February 22, 2024
    Inventors: ChunSheng Cheng, Zhenyun Wei, QuanGuo Li, Xiaohua Ma, Peng Li, Xuan Liu, Rong Kong, Chuang Zhao
  • Patent number: 11850557
    Abstract: Embodiments of the present disclosure feature an intrinsically microporous ladder-type Tröger's base polymer including a repeat unit based on a combination of W-shaped CANAL-type and V-shaped Tröger's base building blocks, methods of making the intrinsically microporous ladder-type Tröger's base polymer, and methods of using the intrinsically microporous ladder-type Tröger's base polymer to separate a chemical species from a fluid composition including a mixture of chemical species. Embodiments of the present disclosure further include ladder-type diamine monomers for reacting to form a Tröger's base in situ, and methods of making the ladder-type diamine monomers using catalytic arene-norbornene annulation.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: December 26, 2023
    Assignees: King Abdullah University of Science and Technology, The Board of Trustees of the Leland Stanford Junior University
    Inventors: Xiaohua Ma, Ingo Pinnau, Holden W. H. Lai, Yan Xia
  • Patent number: 11319439
    Abstract: Embodiments of the present disclosure describe polyimide blend compositions, methods of making polyimide blend compositions, methods of using polyimides, membranes including polyimide blends, methods of making membranes including polyimide blends, methods of separating mixtures using the membranes including polyimide blends, and the like.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: May 3, 2022
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Ingo Pinnau, Nasser Alaslai, Xiaohua Ma, Yingge Wang
  • Patent number: 11273630
    Abstract: Transfer films, articles made therewith, and methods of making and using transfer films to form an electrical stack are disclosed. The transfer films may include a plurality of co-extensive electrical protolayers forming an electrical protolayer stack, at least selected or each electrical protolayer independently comprising at least 25 wt % sacrificial material and a thermally stable material and having a uniform thickness of less than 25 micrometers. The transfer films may include a plurality of co-extensive electrical protolayers forming an electrical protolayer stack, at least selected or each protolayer independently exhibiting a complex viscosity of between 103 and 104 Poise at a shear rate of 100/s when heated to a temperature between its Tg and Tdec.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: March 15, 2022
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Martin B. Wolk, Michael Benton Free, Daniel J. Schmidt, Justin P. Meyer, Mark J. Pellerite, Stephen A. Johnson, Terry O. Collier, Xiaohua Ma
  • Publication number: 20220039034
    Abstract: In the method, the first device may transmit to a second device a first initial duration of the first presentation time offset, where the first presentation time offset is a period from data being input to the first device to the data being output from the second device. Besides, the first device may receive, from the second device, the second initial duration of a second presentation time offset, where the second presentation time offset is a period from data being input to the second device to the data being output from the first device. Afterwards, the first device may determine an adjusted duration of the first presentation time offset based on a longer one of the first initial duration and the second initial duration.
    Type: Application
    Filed: June 23, 2021
    Publication date: February 3, 2022
    Applicant: Nokia Solutions and Networks Oy
    Inventor: Xiaohua MA
  • Publication number: 20220023804
    Abstract: Embodiments of the present disclosure feature an intrinsically microporous ladder-type Tröger's base polymer including a repeat unit based on a combination of W-shaped CANAL-type and V-shaped Tröger's base building blocks, methods of making the intrinsically microporous ladder-type Tröger's base polymer, and methods of using the intrinsically microporous ladder-type Tröger's base polymer to separate a chemical species from a fluid composition including a mixture of chemical species. Embodiments of the present disclosure further include ladder-type diamine monomers for reacting to form a Tröger's base in situ, and methods of making the ladder-type diamine monomers using catalytic arene-norbornene annulation.
    Type: Application
    Filed: September 17, 2019
    Publication date: January 27, 2022
    Inventors: Xiaohua MA, Ingo PINNAU, Holden W.H. LAI, Yan XIA
  • Publication number: 20210359121
    Abstract: A high electron mobility transistor (HEMT) device is provided. The HEMT device includes a substrate layer, a buffer layer, a barrier layer, and a metallic electrode layer sequentially arranged in that order from bottom to top. The metallic electrode layer includes a source electrode, a gate electrode and a drain electrode sequentially arranged in that order from left to right. The barrier layer may include m number of fluorine-doped regions arranged in sequence, where m is a positive integer and m?2. The HEMT device can realize a relative stability of transconductance in a large range of a gate-source-bias through mutual compensation of transconductances in the fluorine-doped regions with different fluorine-ion concentrations of the barrier layer under the gate electrode, and the HEMT device has a good linearity without the need of excessive adjustments of material structure and device.
    Type: Application
    Filed: June 23, 2021
    Publication date: November 18, 2021
    Inventors: Xuefeng Zheng, Xiaohua Ma, Zhenling Tang, Peijun Ma, Ming Du, Minhan Mi, Yunlong He, Yang Lu, Xiaohu Wang, Chong Wang, Yue Hao
  • Patent number: 11148102
    Abstract: Thin film composite membrane with nano-sized bubbles having enhanced membrane permeability, preparation methods and uses thereof are provided. The method of preparation of a thin film composite membrane, comprising: a) an aqueous solution containing at least an amine, and b) an organic solution containing at least a polyfunctional acyl halide, an additive or soluble gas being present in a) and/or b), or a nano-bubble generator or ultrasound are used to generate nano-bubbles in a) and/or b). Interfacial polymerization of a) and b) occurs at or near the surface of a porous support membrane. The advantage of creating nano-sized bubbles in the separating layer of membrane is that it can reduce membrane resistance without sacrificing the mechanical strength and stability of the membrane so as to improve its water permeability, salt rejection and antifouling. In addition, the process is simple to adopt while performance improvement of the membrane is remarkable.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: October 19, 2021
    Assignee: THE UNIVERSITY OF HONG KONG
    Inventors: Xiaohua Ma, Chuyang Tang
  • Patent number: 11024844
    Abstract: An electrochemically active material includes an active phase that includes silicon, and at least one inactive phase having a Scherrer Grain Size of greater than 5 nanometers. Each inactive phase of the material having a Scherrer Grain Size of greater than 5 nanometers has a lattice mismatch to Li15Si4 of greater than 5%.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: June 1, 2021
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Xiaohua Ma, Mark N. Obrovac
  • Patent number: 11014932
    Abstract: Embodiments of the present disclosure provide compounds derived by Troger's amine as shown below, microporous structures, membranes, methods of making said compounds, structures, and membranes, methods of use for gas separation, and the like (Formula A1).
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: May 25, 2021
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Xiaohua Ma, Ingo Pinnau
  • Patent number: 10961349
    Abstract: Embodiments of the present disclosure provide for an ortho (o)-hydroxy-functionalized diamine, a method of making an o-hydroxy-functionalized diamine, an o-hydroxy-functionalized diamine-based polyimide, a method of making an o-hydroxy-functionalized diamine imide, methods of gas separation, and the like.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: March 30, 2021
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Xiaohua Ma, Bader S. Ghanem, Ingo Pinnau
  • Publication number: 20200403233
    Abstract: An electrochemically active material includes an active phase that includes silicon, and at least one inactive phase having a Scherrer Grain Size of greater than 5 nanometers. Each inactive phase of the material having a Scherrer Grain Size of greater than 5 nanometers has a lattice mismatch to Li15Si4 of greater than 5%.
    Type: Application
    Filed: September 2, 2020
    Publication date: December 24, 2020
    Inventors: Xiaohua Ma, Mark N. Obrovac
  • Patent number: 10819400
    Abstract: An electrochemically active material is represented by general formula (I): SiuSnvM1wM2x[P0.2O0.8]y·Az(I) where u, v, w, x, y, and z represent atomic % values and u+v+w+x+y+z=100, M1 includes a metal element or combinations of metal elements selected from Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, B, carbon, or alloys thereof, M2 includes a metal element or combinations of metal elements selected from Mg, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, or alloys thereof, A is an inactive phase other than a phosphate or silicide, and 0<u<90, 0?v<20, 0<w<50, 0<x<20, 0<y<20, and 0?z<50.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: October 27, 2020
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Xiaohua Ma, Vincent J. Chevrier
  • Patent number: 10777812
    Abstract: An electrochemically active material includes an active phase that includes silicon, and at least one inactive phase having a Scherrer Grain Size of greater than 5 nanometers. Each inactive phase of the material having a Scherrer Grain Size of greater than 5 nanometers has a lattice mismatch to Li15Si4 of greater than 5%.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: September 15, 2020
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Xiaohua Ma, Mark N. Obrovac
  • Patent number: 10755990
    Abstract: The present disclosure provides a method for characterizing ohmic contact electrode performance of a semiconductor device. The method comprises: preparing two sets of testing patterns on a semiconductor device; testing resistance values of the two sets of testing patterns respectively; calculating a sheet resistance of an ohmic contact area according to the obtained resistance values; and evaluating the ohmic contact electrode performance of the semiconductor device according to the sheet resistance of the ohmic contact electrode.
    Type: Grant
    Filed: April 6, 2019
    Date of Patent: August 25, 2020
    Assignee: XIDIAN UNIVERSITY
    Inventors: Xuefeng Zheng, Xiaohua Ma, Yue Hao, Shuaishuai Dong, Peng Ji, Yingzhe Wang, Zhenling Tang, Chong Wang, Shihui Wang
  • Publication number: 20200199141
    Abstract: Embodiments of the present disclosure describe pseudo Tröger's base-derived dianhydrides. Embodiments of the present disclosure also describe polyimides based on pseudo Tröger's base-derived dianhydrides, including intrinsically microporous polyimides. Embodiments of the present disclosure further describe a method of separating chemical species in a fluid composition comprising contacting a polymeric membrane with a fluid composition including at least two chemical species, wherein the polymeric membrane includes one or more of an intrinsically microporous polyimide, and capturing at least one of the chemical species from the fluid composition.
    Type: Application
    Filed: June 12, 2018
    Publication date: June 25, 2020
    Inventors: Xiaohua MA, Mahmoud ABDULHAMID, Ingo PINNAU
  • Publication number: 20200165189
    Abstract: Embodiments of the present disclosure describe carbocyclic pseudo Tröger's base (CTB) amines. Embodiments of the present disclosure further describe microporous polymers derived from pseudo CTB amines, including, but not limited to, polyimides, CTB ladder polymers, and network porous polymers. Other embodiments describe a method of separating chemical species in a fluid composition comprising contacting a microporous polymer membrane with a fluid composition including at least two chemical species, wherein the microporous polymer membrane includes one or more of a ladder polymer of intrinsic microporosity, a microporous polyimide, and a microporous network polymer; and capturing at least one of the chemical species from the fluid composition.
    Type: Application
    Filed: June 14, 2018
    Publication date: May 28, 2020
    Inventors: Mahmoud Atef ABDULHAMID, Xiaohua MA, Ingo PINNAU
  • Publication number: 20200148825
    Abstract: The present disclosure provides for a multi-anhydride, a polyimide, a method of making a dianhydride, a method making a multi-anhydride, a method of making a polyimide, and the like.
    Type: Application
    Filed: January 20, 2020
    Publication date: May 14, 2020
    Inventor: Xiaohua MA
  • Publication number: 20200129931
    Abstract: Thin film composite membrane with nano-sized bubbles having enhanced membrane permeability, preparation methods and uses thereof are provided. The method of preparation of a thin film composite membrane, comprising: a) an aqueous solution containing at least an amine, and b) an organic solution containing at least a polyfunctional acyl halide, an additive or soluble gas being present in a) and/or b), or a nano-bubble generator or ultrasound are used to generate nano-bubbles in a) and/or b). Interfacial polymerization of a) and b) occurs at or near the surface of a porous support membrane. The advantage of creating nano-sized bubbles in the separating layer of membrane is that it can reduce membrane resistance without sacrificing the mechanical strength and stability of the membrane so as to improve its water permeability, salt rejection and antifouling. In addition, the process is simple to adopt while performance improvement of the membrane is remarkable.
    Type: Application
    Filed: April 19, 2018
    Publication date: April 30, 2020
    Applicant: THE UNIVERSITY OF HONG KONG
    Inventors: Xiaohua MA, Chuyang TANG