Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2008-01-25
2011-11-08
Hoffman, Susan (Department: 1655)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C424S401000, C424S736000
Reexamination Certificate
active
08053469
ABSTRACT:
This invention relates to improved solutions comprising ascorbic acid (vitamin C). These solutions may comprise as much as 15% ascorbic acid; they are stable for at least two years, without no significant development of yellowish coloration and no substantial (not more than 10%) degradation of the vitamin. The process involves sequential additions of ascorbic acid and ethoxydiglycol to a first solution of vitamin in water, which are followed by addition of propylene glycol. The high stirring speed that occurs during the additions favors a process of micronization. Mild heating is used to achieve ascorbic acid concentrations equivalent to about 6% in 10% water or higher.
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Database Embase Online; Elsevier Science Publishers, Amsterdam, NL; retrieved from STN Database accession No. 77048093; XP002198232, 1976.
Costa Anthony
Vivier Ghislain
Gauvreau Julie
Goudreau Gage Dubuc
Hoffman Susan
Vivier Canada Inc.
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