Gastroretentive drug formulation and delivery systems and their method of preparation using functionalized calcium carbonate
US9987230B2 · kind B2 · utility
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6References
25Claims
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Key dates
| Filing date | May 17, 2016 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | May 17, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K31/522
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An instantly floating gastroretentive drug formulation comprising at least one functionalized natural and/or synthetic calcium carbonate-comprising mineral and at least one pharmaceutically active ingredient and at least one formulating aid wherein said functionalized natural or synthetic calcium carbonate is a reaction product of natural or synthetic calcium carbonate with carbon dioxide and one or more acids, wherein the carbon dioxide is formed in situ by the acid treatment and/or is supplied from an external source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.