Dental floss having low density and method of making same
US6539951B2 · kind B2 · utility
9Cited by
16References
55Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1999 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Nov 24, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C15/041
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dental floss comprising a porous PTFE fiber having a density of less than about 0.7 g/cc. The inventive floss is abrasion resistant, grippable and has a soft feel to the hands and a rough feel in the mouth. The floss is made by an extrusion process with non-contact heating during subsequent expansion with amorphous locking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.