Composite gel-foam air freshener
US5034222A · kind A · utility
49Cited by
16References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1990 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Mar 1, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L9/048
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A solid composite air freshening article is provided which comprises a granular foam phase dispersed throughout a gelled phase in an amount effective to provide a sustained release of an effective amount of volatile air freshening ingredients present in both the foam and gelled phases. The foam phase comprises granules of a hydrophilic, polyurethane foam incorporating a volatile air freshening ingredient, a surfactant, and a solid filler material, while the gelled phase comprises water, a gelling agent, an organic solvent, and the same or a different air freshening ingredient as the granular foam phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.