Process for preparing guaifenesin tannate
US6689817B1 · kind B1 · utility
1Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Jan 6, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07H13/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention pertains to a process for preparing guaifenesin tannate. The process involves the steps of mixing guaifenesin with tannic acid in the presence of water, continuing to mix the reaction mixture for about 5 minutes to about 4 hours and thereafter removing at least about 80 wt.% of the water by freeze-drying the reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.