Step 1: Understanding the Indian Patent Act. Under the Indian Patent Act, a patent is granted for a fixed period to provide exclusive rights to the inventor to manufacture, use, sell, and distribute the invention.
Step 2: Duration of Patent Protection. According to The Patents Act, 1970 (as amended in 2005), the term of a patent in India is 20 years from the date of filing, provided renewal fees are paid regularly. This applies to all types of patents, including pharmaceuticals, industrial, and software-related inventions.
Step 3: Why other options are incorrect.
- (B) 10 Years: Incorrect, as patents are not granted for a 10-year term under the Indian system.
- (C) 30 Years and (D) 40 Years: Incorrect, as Indian patent laws do not extend beyond 20 years.
The question asks how long a patent granted under the Indian Patent Act remains valid. This is a direct statutory fact rather than something to derive, so checking what the Act itself specifies settles it.
The Act is explicit that every patent, regardless of the field of invention, runs for a single fixed term measured from the filing date.
Therefore, the correct answer is 20 Years.
As per the Pharmacy Act, in the composition of Pharmacy Council of India, the total number of Ex‐officio members is
List I | List II | ||
|---|---|---|---|
| A | \(\Omega^{-1}\) | I | Specific conductance |
| B | \(∧\) | II | Electrical conductance |
| C | k | III | Specific resistance |
| D | \(\rho\) | IV | Equivalent conductance |
List I | List II | ||
|---|---|---|---|
| A | Constant heat (q = 0) | I | Isothermal |
| B | Reversible process at constant temperature (dT = 0) | II | Isometric |
| C | Constant volume (dV = 0) | III | Adiabatic |
| D | Constant pressure (dP = 0) | IV | Isobar |