no
The initial period of protection is 6 years, which can be renewed twice, up to a maximum of 10 years.
no
no
6 months
Reinstatement of priority on grounds of "due care" accepted.
no
10 years
no
yes. A patent applicant can convert the patent type from a petty patent (utility model) to an invention before the patent application is granted. The converted patent application has the filing date of the original patent application.
If within 12 months before the filing date/priority date, the essence or details of the invention are maliciously disclosed, or exhibited by the inventor in an international or official exhibition, the invention does not lose its novelty.