Patent · US Active

Disulfo-type fluorescent whitening agents

US8696867B2 · kind B2 · utility

1Cited by

3References

9Claims

0Family size

Assignee

BLANKOPHOR GMBH & CO. KG · DE

Inventors

Bernhard Hunke · Hennef (Sieg), DE
Andrei Tauber · Cologne, DE
Michael Kraemer · Nidderau, DE
Guenter Klug · Langenfeld, DE
Theo Lansing · Leverkusen, DE
Marco Hafermann · Bensberg, DE

Key dates

Filing date	Sep 17, 2010
Grant date	Apr 15, 2014
Priority date	—
Expiry date	Sep 17, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31993
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Concentrated aqueous fluorescent whitening agent preparations are disclosed for optically whitening paper, wherein the preparation contains a specific disulfo-type fluorescent whitening agent.

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