A patent is a monopoly right for invention of a new and user, article or an improvement of an existing article or a new process of making- an article. It consists of an exclusive right to manufacture the new article invented or manufacture an article according to the invented process for limited period. Anybody can use the invention after expiry [...]
If the grant of the patent is for a product, then the patentee has a right to prevent others from making, using, offering for sale, selling or importing the patented product in India. […]
Subject to the provisions contained in this section, where an invention, being an improvement in or modification of another invention, is the subject of an independent patent and the patentee in respect of that patent is also the patentee in respect of the patent for the main invention, the Controller may, if the patentee so requests, by order, revoke the [...]