Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2011-04-19
2011-04-19
Price, Elvis O (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C549S379000
Reexamination Certificate
active
07928251
ABSTRACT:
The present invention relates to a process for preparing tetramethylglycolide by heating a composition which comprises at least 50% by weight of 2-hydroxy-isobutyric acid and/or tetramethylglycolide to a temperature of at least 100° C.
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May Alexander
Siegert Hermann
Vogel Bernd
Evonik Roehm GmbH
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Price Elvis O
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