BENGALURU, Dec. 25 -- Hexaware Technologies Ltd has moved a US court to dismiss a patent infringement lawsuit that seeks more than $500 million in damages-an amount that could materially affect the Indian IT firm's financials-arguing that the inventions it is accused of infringing are not patentable under US law.

Carlyle-backed Hexaware, which re-entered Indian bourses in February, has argued that the inventions at the centre of the dispute amount to abstract ideas rather than genuine technological innovations.

"For more than 150 years, the Supreme Court has held that patents cannot protect laws of nature, natural phenomena, and abstract ideas because these are the basic tools of scientific and technological work," read a 12 December He...