Stone cleaning agent and preparation thereof
US6090766A · kind A · utility
2Cited by
12References
8Claims
0Family size
Inventor
Key dates
| Filing date | Oct 12, 1999 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Oct 12, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D7/5022
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
It has long been the practice to clean monuments and memorials, in fact, any stone surface through the use of harsh chemicals or physical removal systems, such as sand blasting. A compound containing ammonium fluoride (NH4F), ammonium bifluoride (NH4F.HF), denatured alcohol (CH2H60) and water is mixed in an aqueous solution for use as a cleaning agent for all stone products and structures. A method of cleaning the stone items is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.