In-tank toilet cleansing block having polyacrylic acid/acrylate
US5863876A · kind A · utility
7Cited by
29References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1997 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Feb 11, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/0056
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein is a toilet cleansing block containing a polyacrylate polymer and a lauryl benzene sulfonate salt surfactant. The block is essentially free of other polymers that sequester ions. The block is for immersion in toilet tanks, and inhibits toilet bowl ring and stain formation, particularly those caused by iron oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.