Patents by Inventor Pei Yun Teo

Pei Yun Teo 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).

  • Low molecular weight branched polyamines for delivery of biologically active materials
    Patent number: 9109087
    Abstract: A branched polyamine comprises about 8 to about 12 backbone tertiary amine groups, about 18 to about 24 backbone secondary amine groups, a positive number n? greater than 0 of backbone terminating primary amine groups, and a positive number q greater than 0 of backbone terminating carbamate groups of formula (2): wherein (n?+q) is a number equal to about 8 to about 12, the starred bond of formula (2) is linked to a backbone nitrogen of the branched polyamine, L? is a divalent linking group comprising 3 to 30 carbons, and q/(n?+q)×100% equals about 9% to about 40%.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: August 18, 2015
    Assignees: International Business Machines Corporation, Agency For Science, Technology And Research
    Inventors: Wei Cheng, Daniel J. Coady, Amanda C. Engler, James L. Hedrick, Pei Yun Teo, Chuan Yang, Yi Yan Yang
  • Branched polyamines for delivery of biologically active materials
    Patent number: 8703197
    Abstract: A branched polyamine comprises about 45 to about 70 backbone tertiary amine groups, about 90 to about 140 backbone secondary amine groups, a positive number n? greater than 0 of backbone terminating primary amine groups, and a positive number q greater than 0 of backbone terminating carbamate groups of formula (2): wherein (n?+q) is a number equal to about 45 to about 70, the starred bond of formula (2) is linked to a backbone nitrogen of the branched polyamine, L? is a divalent radical comprising 3 to 30 carbons, and q/(n?+q)×100% equals about 9% to about 47%.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 22, 2014
    Assignees: International Business Machines Corporation, Agency for Science, Technology and Research
    Inventors: Wei Cheng, Daniel J. Coady, Amanda C. Engler, James L. Hedrick, Pei Yun Teo, Chuan Yang, Yi Yan Yang
  • BRANCHED POLYAMINES FOR DELIVERY OF BIOLOGICALLY ACTIVE MATERIALS
    Publication number: 20140080215
    Abstract: A branched polyamine comprises about 45 to about 70 backbone tertiary amine groups, about 90 to about 140 backbone secondary amine groups, a positive number n? greater than 0 of backbone terminating primary amine groups, and a positive number q greater than 0 of backbone terminating carbamate groups of formula (2): wherein (n?+q) is a number equal to about 45 to about 70, the starred bond of formula (2) is linked to a backbone nitrogen of the branched polyamine, L? is a divalent radical comprising 3 to 30 carbons, and q/(n?+q)×100% equals about 9% to about 47%.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 20, 2014
    Applicants: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Wei Cheng, Daniel J. Coady, Amanda C. Engler, James L. Hedrick, Pei Yun Teo, Chuan Yang, Yi Yan Yang
  • LOW MOLECULAR WEIGHT BRANCHED POLYAMINES FOR DELIVERY OF BIOLOGICALLY ACTIVE MATERIALS
    Publication number: 20140073048
    Abstract: A branched polyamine comprises about 8 to about 12 backbone tertiary amine groups, about 18 to about 24 backbone secondary amine groups, a positive number n? greater than 0 of backbone terminating primary amine groups, and a positive number q greater than 0 of backbone terminating carbamate groups of formula (2): wherein (n?+q) is a number equal to about 8 to about 12, the starred bond of formula (2) is linked to a backbone nitrogen of the branched polyamine, L? is a divalent linking group comprising 3 to 30 carbons, and q/(n?+q)×100% equals about 9% to about 40%.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 13, 2014
    Applicants: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Wei Cheng, Daniel J. Coady, Amanda C. Engler, James L. Hedrick, Pei Yun Teo, Chuan Yang, Yi Yan Yang