Patent · US Expired

Process for regenerating wastepaper in the presence of hydroxysulfonate salts

US5234545A · kind A · utility

7Cited by

1References

7Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Bernd Fabry · Korschenbroich, DE
Berthold Schreck · Goldkronach, DE
Maria Liphard · Essen, DE

Key dates

Filing date	Apr 24, 1992
Grant date	Aug 10, 1993
Priority date	—
Expiry date	Apr 24, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/64
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

The invention relates to a process for regenerating wastepaper and to the use of certain hydroxysulfonate salts for removing printing ink from printed wastepaper and/or paper circuit waters.

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