Source for what? The links I provided show the abandonment of the application for the "Novel Difluorinated..." patent. The US8236935 "Podophyllotoxin" patent that was awarded last Aug is different.
The "Novel Difluorinated..." patent application was the broad patent that presumably overlapped too much with prior art. Sunshine refers to it under the PCT application number PCT/FR2003/002330. http://www.sunshinebiopharma.com/technology.html
Curiously, ProtoKinetix also claims their IP is covered under this patent, citing WO 2004/014928 A2 (19 February 2004) (which is the WIPO patent number issued under the PCT/FR2003/002330 application). http://www.protokinetix.com/aagp/patents/
To see for yourself, go to http://portal.uspto.gov/external/portal/pair/
and search for PCT number "PCT/FR2003/002330". The result will be "The related U.S. Application 10522365 is a National Stage Entry of PCT/FR03/02330". Click on the underlined 10522365 link to display the status of that application.
If you do the same for PCT/FR2007/000697, you'll see the new 8,236,935 patent. If you click on the transaction history tab, you'll see the it wasn't all smooth sailing. The original application got a final rejection Dec 20, 2011. The amended application was allowed Mar 2012, and issued Aug, 2012.
Sunshine/Advanomics Adva-27 should be protected under the recent patent (it is a CF2 stabilized version of podophyllotoxin), but I am sure Advanomics cannot lay claim to the difluoride technique in general. Given that the recent patent was initially rejected, but then was allowed after amendment, I can't begin to guess how well it will stand up to challenge. Analyzing the claims for these patents for comparison to the Sirona patents would be interesting and prove to be a pleasant 60-hour passtime for anyone that might be interested.
To be clear, the application and patent info for the two patents in question are:
WO2004/014928 = PCT/FR2003/002330 = CA 2492940 = US 10522365 = EPO 2003758183 (withdrawn 11.01.2011) = CN 03817770.6 NOVEL DIFLUORINATED GEM COMPOUNDS, PREPARATION METHODS THEREOF AND APPLICATIONS OF SAME
WO2007/125194 = PCT/FR2007/000697 = US 8,236,935 B2 = CA 2650384 = EP20070731356 = 2024379 (A1) = EP2024379 (B1) FR2900154 (A1) US2009318675 (A1) US8236935 (B2) WO2007125194 (A1) ES2353436 (T3) CA2650384 (A1) AT482225 (T) l NEW GEM-DIFLUORIDE C-GLYCOSIDE COMPOUNDS DERIVED FROM PODOPHYLLOTOXIN, THEIR PREPARATION AND APPLICATIONS