Moneycontrol.com | Indian Patent Office revokes Pfizer's Sutent patent Moneycontrol.com The Indian Patent Office surprised the pharma sector by revoking the five-year old patent for Pfizer 's kidney cancer drug Sutent on grounds that the drug lacks any inventive step and Indian generic drug makers are scrambling to use it to their advantage. Another negative Indian patent ruling, this time for Pfizer's Sutent |