Patents by Inventor Abdullah M. Alabdulrahman

Abdullah M. Alabdulrahman 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).

  • Methods of depolymerizing terephthalate polyesters
    Patent number: 8541477
    Abstract: A method comprises forming a reaction mixture comprising a terephthalate polyester, a glycol comprising 2 to 5 carbons, and an amidine organocatalyst; and heating the reaction mixture at a temperature of about 120° C. or more to depolymerize the terephthalate polyester, thereby forming a terephthalate reaction product comprising a monomeric dihydroxy terephthalate diester; wherein the terephthalate reaction product contains terephthalate oligomers in an amount less than the amount of terephthalate oligomers that would result from i) substituting the amidine organocatalyst with an equimolar amount of a guanidine catalyst and ii) depolymerizing the terephthalate polyester under otherwise identical reaction conditions.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: September 24, 2013
    Assignees: International Business Machines Corporation, King Abdulaziz City for Science and Technology
    Inventors: Abdullah M Alabdulrahman, Hamid A Almegren, Fares D Alsewailem, Phillip Joe Brock, Daniel Joseph Coady, Kazuki Fukushima, James Lupton Hedrick, Hans Werner Horn, Julia Elizabeth Rice
  • METHODS OF DEPOLYMERIZING TEREPHTHALATE POLYESTERS
    Publication number: 20120223270
    Abstract: A method comprises forming a reaction mixture comprising a terephthalate polyester, a glycol comprising 2 to 5 carbons, and an amidine organocatalyst; and heating the reaction mixture at a temperature of about 120° C. or more to depolymerize the terephthalate polyester, thereby forming a terephthalate reaction product comprising a monomeric dihydroxy terephthalate diester; wherein the terephthalate reaction product contains terephthalate oligomers in an amount less than the amount of terephthalate oligomers that would result from i) substituting the amidine organocatalyst with an equimolar amount of a guanidine catalyst and ii) depolymerizing the terephthalate polyester under otherwise identical reaction conditions.
    Type: Application
    Filed: March 4, 2011
    Publication date: September 6, 2012
    Applicants: KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY, INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Abdullah M. Alabdulrahman, Hamid A. Almegren, Fares D. Alsewailem, Phillip Joe Brock, Daniel Joseph Coady, Kazuki Fukushima, James Lupton Hedrick, Hans Werner Horn, Julia Elizabeth Rice