Self-tensioning hair waving rod
US4605021A · kind A · utility
5Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1984 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Aug 13, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA45D2/18
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The self-tensioning hair waving rod includes a cylindrical sponge body and retainer means for holding a strand of hair wrapped around the sponge body. The sponge body is formed of a hydrophilic polymer which expands from a dry condition on application of water to increase its volume by at least 50%. This expansion tightens the wrapped hair strand and draws it into close proximity to the outer surface of the sponge body. This hair waving rod and its method of use are adapted for home permanents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.