Q1.  Is patent registration mandatory to protect an invention?

Yes — unlike copyright, patent rights do not arise automatically. Formal filing, examination, and grant by the Indian Patent Office are required before you hold any enforceable exclusive rights over the invention.

Q2.  What qualifies as patentable?

An invention must be novel, involve an inventive step that isn't obvious to someone skilled in the field, and be capable of industrial application, under Section 2(j) of the Patents Act, 1970.

Q3.  What cannot be patented in India?

Section 3 excludes mere discoveries, mathematical or business methods, computer programs per se, methods of agriculture, and certain other categories from patentability — though software with a demonstrable technical effect may still qualify.

Q4.  How long does patent protection last?

20 years from the date of filing, provided annual renewal (maintenance) fees are paid starting from the 3rd year onward.

Q5.  What's the difference between provisional and complete specification?

A provisional specification secures an early priority date with a broad description; the complete specification, containing full claims and details, must follow within 12 months.

Q6.  How long does it take to get a patent granted?

Typically 2 to 5 years through the standard process; startups can access expedited examination under Rule 24C, potentially reducing this to about 1 to 2 years.

Q7.  What's the difference between pre-grant and post-grant opposition?

Pre-grant opposition can be filed by any person at any time before the patent is granted. Post-grant opposition can only be filed by an 'interested person' within 12 months of the grant date.

Q8.  Can foreign inventors file a patent in India?

Yes, via the Paris Convention route (claiming priority within 12 months of a foreign filing) or by entering the national phase in India from a PCT international application.

Q9.  What happens if I miss a renewal fee?

The patent lapses. Restoration may be possible within a prescribed window by filing an application and paying the requisite fee, subject to the Controller's satisfaction that the delay was unintentional.

Q10.  Do I need a patent agent to file?

Not legally required, but strongly recommended — claims drafting is technically and legally demanding, and errors at this stage are difficult and costly to correct later.