20 years
yes
via Paris Convention : 12 months from earliest priority date.
Yes, during the formality examination period within 90 days from the filing date, the type of invention can be converted into a utility model at the request of the applicant by paying the corresponding fee.
yes
4-6 months
Restoration of priority will not be accepted.
no
no
2 years
Yes, a utility model can be converted into an invention during the formality examination period within 90 days from the filing date.