Once the invention obtains the patent certificate, it cannot be used by anyone else without the patentee's consent. The inventions can be patented after they fulfill the conditions as provided by the Act. This article provides information about the provisions in regards to patent registration.
In order to obtain the patent, an invention must be:
Chapter II of the Act provides that the following cannot obtain Patent:
The patent certificate is not for life, it remains valid for 20 years only from the date of patent application (either provisional or complete specification). It comes under the public domain after the patent expires i.e. 20 years.