A patentable invention can be any (1) Art, process, method or manner of manufacture, (2) Machine, apparatus or other articles, (3) Substances produced by manufacturing, (4) Computer software with technical application to industry or used with Hardware, and (5) Product patent for food, chemicals, medicines and drugs.
20 years from the date of filing for a provisional or permanent patent, the patent falls into the public domain.
The details of the invention on a CD or pen drive, along with its name, comparison with existing products, uses and date of publication (if any). Applicant information is also required.
A patentee must disclose the invension in the patent document for anyone to practice it after the expiry of the patent or practice it with the consent of the patent holder during the life of the patent.
It is, therefore, effective only in India. However, filing an application in India enables the applicant to file a corresponding application for same invention in convention countries, within or before expiry of twelve months from the filing date in India. Therefore, separate patents should be obtained in each country where the applicant requires protection of his invention in those countries. There is no patent valid worldwide.