Process for the preparation of hollow particulates
US4127622A · kind A · utility
40Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1975 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | Sep 19, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5089
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A hollow particulate for gastric medicines and other durable medicines suspendable in the gastric juice and remainable in the stomach for a long period of time is provided which has been prepared by dissolving ethylcellulose in a lower chlorinated hydrocarbon, or a mixed solution of the lower chlorinated hydrocarbon and a lower chlorofluorinated hydrocarbon and/or water, so that the concentration of ethylcellulose is 0.5 - 4% by weight on the basis of the total weight of the resulting solution, and then spray-drying the solution at an inlet temperature of higher than 50.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.