The time for filing post-grant opposition is 12 months from the date of publication of the grant of patent in the official journal of the patent office.
Patent – A Patent is a statutory right for an invention granted for a limited period of time to the patentee by the Government, in exchange of full disclosure of his invention for excluding others, from making, using, selling, importing the patented product or process for producing that product for those purposes without his consent.
A government authority or licence conferring a right or title for a set period, especially the sole right to exclude others from making, using, or selling an invention.
Intellectual property rights are the rights given to persons over the creations of their minds. They usually give the creator an exclusive right over the use of his/her creation for a certain period of time.