http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=/netahtml/PTO/search-bool.html&r=7&f=G&l=50&co1=AND&d=PTXT&s1=6630507&OS=6630507&RS=663050http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=/netahtml/PTO/search-bool.html&r=0&f=S&l=50&TERM1=6630507+&FIELD1=&co1=AND&TERM2=&FIELD2=&d=PTXTsource was http://ricksimpsonhempoil.blogspot.com/2011/03/curing-cancer-with-cannabis-extract.html