6 months before the filing date/priority date.
no
no
via Paris Convention : 6 months from earliest priority date.
20 years (Bangladesh Patents Act 2022)
If the patent is disclosed due to the display at the exposition or unintentional disclosure, the novelty grace period can be enjoyed within 6 months before the filing date/priority date.
- Grant fee: The applicant shall pay the granted official fee within 2 months after receiving the granted notice.
- Annuity: It needs to be paid year by year starting from the fifth year from the application date.
2 years
no
no
- Authorization Fee: None
- Annuity: payable year by year starting from the 6th year from the date of application