Preparation of purified hydroquinone and forming of same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 6, 2011
Grant Date -
Dec 10, 2009
app pub date -
Jun 27, 2007
filing date -
Jun 29, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Purified hydroquinone is prepared and formed from raw compounds essentially containing hydroquinone associated with very small quantities of impurities including resorcinol and pyrogallol, and includes a distillation purification step in which the resorcinol and pyrogallol are eliminated, directly followed by a step in which the purified hydroquinone is formed.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully