Controlled fragrance releasing crystal beads
US4020156A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1976 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | Feb 13, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/621
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Fragrance releasing crystal beads are provided which gradually release a fragrance under anhydrous conditions and provide a rapid release of fragrance when wetted. The beads comprise a water-soluble particulate carrier, e.g. prilled urea, coated with a finely divided highly absorptive inorganic matrix containing the fragrance. The beads optionally include emollients and bacteriostats and the like and can be used for pleasingly perfumed sachets or as bath beads or as agents for the control of malodors in pet litter. The particulate beads may be conspicuously colored such that their color substantially disappears as they are dissolved, giving a visual indication of the need for replenishment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.