2. Legal obstacles in the applicant country
3. Application time.
If there are many countries applying, it is best to take PCT or PPH, so the procedures and expenses can be less. But if you only apply for one country, it is better to follow the normal procedure.
It is very difficult, because when you apply for other countries, you need the agency of that country to submit documents and entrust them. Moreover, foreign intermediary fees are very high. E-mails are generally in English, so language clearance is required. In addition, if the patent fails at one time and needs to be amended or defended, the cost will be much higher. It should be considered that a country still has about 60 thousand reserve funds left.
Moreover, the application is risky and may cost a lot of money. The result is that there is no patent certificate, so the application should be cautious.