EP 0346648 B1 19930107 - PROCESS FOR IMPREGNATING THE FIBRES OF A TOBACCO SMOKE FILTER WITH DI- OR POLYCARBOXYLIC ACIDS OR THEIR ANHYDRIDES
Title (en)
PROCESS FOR IMPREGNATING THE FIBRES OF A TOBACCO SMOKE FILTER WITH DI- OR POLYCARBOXYLIC ACIDS OR THEIR ANHYDRIDES
Publication
Application
Priority
DE 3820089 A 19880613
Abstract (en)
[origin: EP0346648A2] Fibres of tobacco smoke filters impregnated with di- or polycarboxylic acids or anhydrides thereof can be obtained by dissolving anhydrides of di- or polycarboxylic acids in volatile or physiologically acceptable organic solvents and applying to the fibres and, if desired, hydrolysing with water.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
A24D 3/14 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE GB LI NL
DOCDB simple family (publication)
EP 0346648 A2 19891220; EP 0346648 A3 19901107; EP 0346648 B1 19930107; BR 8903002 A 19900306; DE 3820089 A1 19891214; DE 3820089 C2 19920123; DE 58903210 D1 19930218; JP H0239873 A 19900208; US 5052415 A 19911001
DOCDB simple family (application)
EP 89109168 A 19890522; BR 8903002 A 19890608; DE 3820089 A 19880613; DE 58903210 T 19890522; JP 14928789 A 19890612; US 35634089 A 19890524