** Shares of Alterity Therapeutics ATH.AX rise as much as
16.7% to A$0.011, their best intraday gain since Sept. 20
** Biotech firm says a new composition of matter patent was
allowed by U.S. Patent and Trademark Office, following an
expedited review
** ATH now has 20 years of exclusivity over the substance it
has patented, which it is studying further as a therapy for
neurodegenerative diseases such as Parkinson's Disease and
Anzheimer's Disease
** Stock hits highest level since Dec. 8
** Trading volumes near twice the 30-day average, with over
3 mln shares traded so far
** ATH down 57.1% YTD, as of last close
(Reporting by Harshita Swaminathan)
((Harshita.Swaminathan@thomsonreuters.com))