Method for providing enteric coatings on solid dosage forms
US4017647A · kind A · utility
39Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1975 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Jun 9, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5042
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Enteric coatings are provided on solid pharmaceutical dosage forms by a method comprising covering the dosage froms with an aqueous solution of a polymeric substance having carboxyl groups in the watersoluble salt form and contacting the thus coated dosage forms with an inorganic acid to convert the polymeric substance into the water-insoluble acid form. The coating solution includes no organic solvent, and this method is safe from dangers of fires or explosions and air pollution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.