Microneedles made from polycarbonate-polycarbonate/polysiloxane copolymer compositions
US10449344B2 · kind B2 · utility
2Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2017 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Apr 28, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/448
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A microneedle includes a shaft having a proximal end and a distal end and a capillary space within the shaft, the capillary space (i) connecting the proximal and distal ends or (ii) extending from the distal end of the shaft and connecting with one or more external openings positioned between the proximal end and distal end or (iii) performing the functions of both (i) and (ii). The microneedle includes a polymer mixture which includes (a) optionally polycarbonate, (b) a polycarbonate-polysiloxane copolymer and (c) a mold release agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.