Crystal modifications of (+)-catechin and pharmaceutical preparations containing them
US4515804A · kind A · utility
20Cited by
0References
3Claims
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Assignee
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Key dates
| Filing date | Feb 17, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Feb 17, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P1/16
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Novel crystal modifications of (+)-catechin monohydrate and of (+)-catechin anhydrate more suitable for pharmaceutical preparations for reasons of higher stability against moisture and/or light and distinguished from hitherto known modifications by unique X-ray diffraction spectra are produced by specific recrystallization and/or crystal rearrangement processes and pharmaceutical preparations comprising the novel crystal forms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.