Slow Diffusers Patents (Class 239/34)
- Serially arranged wicks or absorbent means (Class 239/45)
- Nonuse housing or casing arrangement (e.g., stored in supply) (Class 239/47)
- With flow varying means (Class 239/49)
- With means for drip escape from holder (Class 239/51)
- In housing having multiported wall spaced from absorbent means (Class 239/51.5)