Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2005-02-08
2005-02-08
Zucker, Paul A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
Reexamination Certificate
active
06852881
ABSTRACT:
(Meth)acrylic acid is purified by crystallization by a process in which the (meth)acrylic acid is purified by a combination of at least two different dynamic crystallization processes, in particular a suspension crystallization and a layer crystallization.
REFERENCES:
patent: 5831124 (1998-11-01), Machhammer et al.
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Bastiaensen Erik
Baumann Dieter
De Decker Emile
Eck Bernd
Heilek Jörg
BASF - Aktiengesellschaft
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Zucker Paul A.
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