The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 2014
Filed:
Sep. 13, 2012
Wei Cheng, Singapore, SG;
Daniel J. Coady, San Jose, CA (US);
Amanda C. Engler, San Jose, CA (US);
James L. Hedrick, Pleasanton, CA (US);
Pei Yun Teo, Singapore, SG;
Chuan Yang, Singapore, SG;
Yi Yan Yang, Singapore, SG;
Wei Cheng, Singapore, SG;
Daniel J. Coady, San Jose, CA (US);
Amanda C. Engler, San Jose, CA (US);
James L. Hedrick, Pleasanton, CA (US);
Pei Yun Teo, Singapore, SG;
Chuan Yang, Singapore, SG;
Yi Yan Yang, Singapore, SG;
International Business Machines Corporation, Armonk, NY (US);
Agency for Science, Technology and Research, Singapore, SG;
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%.