Fragrant thermoplastic foam and method of making the same
US5109029A · kind A · utility
18Cited by
1References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Oct 2, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L9/042
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Substantially closed-cell thermoplastic foams having a fragrance incorporated into the foam during extrusion are found to provide fragrant and long lasting release characteristics provided the foam is at least 70 percent closed cells. Generally the amount of fragrance is about 0.001 to about 5 weight percent of the total thermoplastic foam weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.