Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2011-08-02
2011-08-02
Davis, Brian J (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
Reexamination Certificate
active
07989667
ABSTRACT:
Disclosed is a novel process for the continuous crystallization of a mixture of cis-2,2,4,4-tetramethylcyclobutanediol and trans-2,2,4,4-tetramethylcyclobutanediol dissolved in a solvent.
REFERENCES:
patent: 5169994 (1992-12-01), Sumner et al.
patent: 5258556 (1993-11-01), Sumner et al.
Davis Brian J
Eastman Chemical Company
Graves, Jr. Bernard J.
Moreno Louis N.
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