Method for preventing crystal formation in a dispersion of a liquid in a matrix
US6569448B1 · kind B1 · utility
1Cited by
14References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1997 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Aug 23, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2013/0296
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An improved method for the manufacture of transdermal drug delivery devices comprising liquid dispersions of a liquid in an aqueous or nonaqueous matrix is disclosed. More particularly, the invention relates to preventing the formation of a crystalline structure in such liquid dispersions by annealing films and laminates in-line immediately following film formation and/or lamination during the manufacture of these devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.