Patents by Inventor Yahya ALZAHRANY

Yahya ALZAHRANY 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).

  • Copolymerization of carbon dioxide and cyclic monomers to form polycarbonates
    Patent number: 10865275
    Abstract: Embodiments of the present disclosure describe initiating systems comprising an activator and an initiator, wherein the activator includes an alkyl borane or alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen. Embodiments of the present disclosure further describe methods of making a polycarbonate comprising contacting a cyclic monomer and carbon dioxide in the presence of an activator and an initiator to form a polycarbonate, wherein the catalyst is one or more of an alkyl borane and alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: December 15, 2020
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Yves Gnanou, Xiaoshuang Feng, Dongyue Zhang, Yahya Alzahrany, Senthil Boopathi, Nikolaos Hadjichristidis
  • COPOLYMERIZATION OF CARBON DIOXIDE AND CYCLIC MONOMERS TO FORM POLYCARBONATES
    Publication number: 20190390007
    Abstract: Embodiments of the present disclosure describe initiating systems comprising an activator and an initiator, wherein the activator includes an alkyl borane or alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen. Embodiments of the present disclosure further describe methods of making a polycarbonate comprising contacting a cyclic monomer and carbon dioxide in the presence of an activator and an initiator to form a polycarbonate, wherein the catalyst is one or more of an alkyl borane and alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen.
    Type: Application
    Filed: August 29, 2019
    Publication date: December 26, 2019
    Inventors: Yves GNANOU, Xiaoshuang FENG, Dongyue ZHANG, Yahya ALZAHRANY, Senthil BOOPATHI, Nikolaos HADJICHRISTIDIS
  • Copolymerization of carbon dioxide and cyclic monomers to form polycarbonates
    Patent number: 10442892
    Abstract: Embodiments of the present disclosure describe initiating systems comprising an activator and an initiator, wherein the activator includes an alkyl borane or alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen. Embodiments of the present disclosure further describe methods of making a polycarbonate comprising contacting a cyclic monomer and carbon dioxide in the presence of an activator and an initiator to form a polycarbonate, wherein the catalyst is one or more of an alkyl borane and alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: October 15, 2019
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Yves Gnanou, Xiaoshuang Feng, Dongyue Zhang, Yahya Alzahrany, Senthil Boopathi, Nikolaos Hadjichristidis
  • COPOLYMERIZATION OF CARBON DIOXIDE AND CYCLIC MONOMERS TO FORM POLYCARBONATES
    Publication number: 20180051134
    Abstract: Embodiments of the present disclosure describe initiating systems comprising an activator and an initiator, wherein the activator includes an alkyl borane or alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen. Embodiments of the present disclosure further describe methods of making a polycarbonate comprising contacting a cyclic monomer and carbon dioxide in the presence of an activator and an initiator to form a polycarbonate, wherein the catalyst is one or more of an alkyl borane and alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen.
    Type: Application
    Filed: November 3, 2017
    Publication date: February 22, 2018
    Inventors: Yahya ALZAHRANY, Xiaoshuang FENG, Senthil BOOPATHI, Dongyue ZHANG, Nikolaos HADJICHRISTIDIS, Yves GNANOU