Acidic limescale removal compositions
US6551985B1 · kind B1 · utility
22Cited by
6References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2000 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Aug 17, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D1/92
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A liquid acidic composition having a sulfamic acid, a second acid, and an acid-stable polymer selected from the group consisting of a sulphonated polystyrene polymer, a vinylpyrrolidone homopolymer or copolymer, and mixtures thereof, to remove limescale-containing stains from a hard-surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.