Patent · US Expired

Detergent tablets for dishwashing machines

US4897212A · kind A · utility

26Cited by

1References

14Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Hans-Friedrich Kruse · Korschenbroich, DE
Jochen Jacobs · Wuppertal, DE

Key dates

Filing date	Nov 21, 1988
Grant date	Jan 30, 1990
Priority date	—
Expiry date	Nov 21, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D17/0091
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A detergent tablet for a dishwashing machine wherein at least about 10% by weight of the tablet is dissolved in the pre-rinse cycle of said machine. The tablet comprises a mixture of hydrated sodium metasilicate, anhydrous sodium metasilicate, anhydrous penta-alkali metal tripolyphosphate wherein the ratio by weight of the anhydrous tripolyphosphate to the anhydrous sodium metasilicate is from about 1:2 to 2:1, an active chlorine compound, and a tabletting aid comprising a mixture of from about 1 to about 5% by weight of sodium acetate and from about 2 to about 6% by weight of spray-dried sodium zeolite NaA, based on the weight of the tablet.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.