Microneedle structure and biodegradable microneedle thereof
US11433225B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2020 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Dec 10, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2037/0046
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A microneedle structure and a biodegradable microneedle thereof are provided. The biodegradable microneedle defining a central axis includes a first step portion and a second step portion that is taperedly extending from the first step portion along the central axis. The biodegradable microneedle has a total height along the central axis and a maximum internal diameter along a direction perpendicular to the central axis. The total height is within a range of 380-430 μm, and an aspect ratio defined by the total height divided by the maximum internal diameter is within a range of 1.2-2.2. In a cross section of the biodegradable microneedle having the central axis, a part of the second step portion arranged away from the first step portion having a corner. The corner has an angle within a range of 65-100 degrees and faces toward the first step portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.