Expanded PTFE floss material and method of making same
US5518012A · kind A · utility
76Cited by
24References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1994 |
| Grant date | May 21, 1996 |
| Priority date | — |
| Expiry date | Jun 15, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention is an expanded polytetrafluoroethylene (PTFE) floss with improved handling properties. Unlike previous expanded PTFE flosses, the floss of the present invention employs a fiber of increased thickness so that the floss is maintained in an unfolded orientation. The improved processing steps of the present invention create a floss that has a number of improved properties, including more uniform dimensions along its length, improved compressibility and handling, and automatic visual indication of those segments of the floss that have been used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.