CRC-free medicinal aerosol formulations of 1,1,1,2-tetrafluoroethane (134A) with polar adjuvant
US6352684B1 · kind B1 · utility
18Cited by
47References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1998 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Apr 28, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/124
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A medicinal aerosol formulation including 0.01-5% medicament, at least 50% by weight 1,1,1,2-tetrafluoroethane (134a), less than 5% surface active agent, and at least one compound having higher polarity than 1,1,1,2-tetrafluoroethane, and which is free of chlorofluorocarbons and propellants CHClF2, CH2F2 and CF3CH3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.