BY KENAN MACHADO

MUMBAI –Differences persist among the founders of Patni Computer Systems Ltd. over a deal to sell their and private equity firm General Atlantic’s combined 63% stake in the company, a person familiar with the matter said Tuesday.

“The deal, if at all acceptable to all [Patni brothers and General Atlantic], is likely to take another two weeks,” the person told Dow Jones Newswires.

The Patni brothers–Ashok Kumar Patni, Gajendra Kumar Patni and Narendra Kumar Patni–are looking to sell their stake of about 46% in the technology company, while General Atlantic wants to sell its holding …