Acid rain neutralizing block, method of making such blocks and method of neutralizing acidified surface water
US5158835A · kind A · utility
5Cited by
8References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 26, 1989 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Dec 26, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/26
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Blocks, weighing about 35 lbs., formed of a homogeneous mixture of about 75% gypsum and 25% lime, are strategically placed in surface water that is being damaged by acid rain, where, by timed release of lime, the pH of the water is maintained at about 6.5 pH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.