The early application was a utility model. PCT can apply for invention patent when it enters the national stage, and it can obtain a longer protection period of invention patent.
2. According to the provisions of the Paris Convention, those who apply for a patent in other countries within 12 months from the date of application for invention or utility model can enjoy priority. Design for 6 months.
The utility model can basically be authorized within 8 months.
3. number three. PCT applications are for different countries, and the applicants can be different (for the United States, the applicants must be inventors). However, if priority is required, it is necessary to provide proof that the applicant enjoys priority.