Molded micro-needles
US7981346B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2005 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jul 11, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB81C2201/034
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Method of hollow micro-projections having side walls and at least one opening in a side wall, by a molding technique. The hollow micro-projections are defined by a first, negative mold defining the exterior shape of the micro-projections and a second, positive mold defining the hollow interior shape of the micro-projections. The method includes injecting a moldable material into the space between the two molds, in a state where they have been brought together. The positive and negative molds each have an essentially cylindrical geometry. In the process of bringing the molds together, the mold halves are laterally off-set with respect to each other, such that the distance between an inner wall of the negative mold and the positive mold in the area, ranges from zero to a finite distance. Micro-projections and arrays of micro-projections are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.