1 year
via Paris Convention : 6 months from earliest priority date.
2 years
20 years (Bangladesh Patents Act 2022)
Inventions under the via Paris Convention : 12 months from the earliest priority date.
no
DPDT conducts formality examination and substantive examination of invention patent applications. The substantive examination starts automatically, and the applicant does not need to file a separate request for substantive examination. If the conditions for patent granted are met, the patent application will enter the public stage. If there is no objection within 4 months after publication, the patent application will be authorized.
no
1 year
no
6 months before the filing date/priority date.