Mark Zuckerberg. Pic/AFP

Facebook has filed a patent application for a technology that will automatically detect the users' socio-economic status and segregate them in one of three classes - working class, middle class or upper class. According to the patent, the social media giant wants to build a system that collects users' personal data, such as education, homeownership and internet usage, in order to predict their socio-economic status, the Dailymail reported.