Method and composition for waving and straightening hair
US7550137B2 · kind B2 · utility
2Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 2005 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Jul 28, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An improved process and composition for straightening or waving hair is achieved combining ammonium bisulfite and ethanolamine sulfite in a single mixture which is maintained at a pH of between about 6.5 and 8.0. By employing the present invention, long lasting, waved or straightened hair is attained. Furthermore, using the hair waving/straightening composition and method of the present invention, the desired waving and/or straightening of hair fiber is achieved in a single step, without the need for a separate application of an oxidizing or neutralizing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.