Table 1 Five base-solvent combinations disclosed in the '035 patent
From: Scope of claim coverage in patents of fufang Chinese herbal drugs: Substitution of ingredients
Combination | Base | Solvent |
|---|---|---|
1 | potassium hydroxide | acetone |
2 | potassium carbonate | acetone |
3 | potassium carbonate | acetone and water |
4 | potassium carbonate | lower alkyl acetate |
5 | potassium carbonate | lower alkyl acetate and water |