Surely those Winklevoss twins wish they’d known when to file. The intellectual property system for entrepreneurs has evolved, and today’s patent race is fiercer than ever. Nobody could touch your idea for a never-been-done natural product when it lived in your head, but now that you’ve become a startup business, your baby is out there for the taking. Kevin Bell, partner at Patton Boggs, tells us exactly when to file for a patent.