yes
no
Indian invention patents need to undergo formality examination and substantive examination, and the applicant/anyone should submit a request for substantive examination within 48 months from the filing date.
no
Indian Patent Office
English: Indian Patent Office, abbreviation: IPO
Website: www.ipindia.gov.in
Indian Invention Patent Search: Intellectual Property India (ipindiaservices.gov.in)
20 years
no
3-8 years
no
no
15 years