Low molecular weight branched polyamines for delivery of biologically active materials
US9109087B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Sep 13, 2012 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Dec 21, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P35/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
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%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.