The 4th amendment of China’s Patent Law on PTA
The patent term adjustment (PTA) system was implemented by the 4th revised Patent Law, which permits an innovation patent in China to have a patent protection period that is longer than the statutory protection length of 20 years under specific situations. More specifically, for an invention patent granted after four years from the date of application and three years from the date of requesting substantive examination, the CNIPA shall compensate the patentee for any unreasonable delay during the granting process [...]
