Method for the removal of rust stains from fabric fibers
US6102972A · kind A · utility
6Cited by
4References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1999 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Apr 30, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L4/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved method of removing rust stains from carpet and other textiles including application of ammonium bifluoride or other fluoride compounds to a rust stain. If the ammonium bifluoride is unable to remove the stain, an acidifying agent is added to the ammonium bifluoride to generate hydrofluoric acid on the stain. The unreacted hydrofluoric acid is then neutralized and removed along with the stain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.