Block-form cleaners for flush toilets

US5759974A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Ronald Menke · Mettmann, DE
• Alexander Ditze · Remscheid, DE
• Gerd Praus · Krefeld, DE

Key dates

• Filing date: Jul 30, 1996
• Grant date: Jun 2, 1998
• Expiry date: Jul 30, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D1/72
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Block-form cleaners for flush toilets which consist of at least two masses of different composition, one of the masses being at least partly surrounded by the other mass(es) and the surrounded mass containing an active substance in a concentration at least 1.3 times higher than in the surrounding mass. This distribution ensures that the active substance is more uniformly released over the useful life of the cleaning block.