Which statement correctly describes when patent protection for a drug begins?

Which statement correctly describes when patent protection for a drug begins?

• A. Patent protection begins after FDA approval
• B. Patent protection begins at patent filing date
• C. Patent protection begins at first sale
• D. Patent protection begins at market entry

Answer: (B)

Patent protection starts when the patent application is filed. The legal term of a patent is measured from the earliest filing date (the priority date), typically 20 years from that filing, not from regulatory approval, first sale, or when the drug first enters the market. This timing reflects the idea that the inventor’s disclosure and the work to examine the application are the basis for the exclusive rights, even though enforcement powers come only after the patent is granted. Note that regulatory review time can affect the effective market life of protection, and in some cases extensions exist, but the basic start of patent protection is tied to the filing date.

Patent protection starts when the patent application is filed. The legal term of a patent is measured from the earliest filing date (the priority date), typically 20 years from that filing, not from regulatory approval, first sale, or when the drug first enters the market. This timing reflects the idea that the inventor’s disclosure and the work to examine the application are the basis for the exclusive rights, even though enforcement powers come only after the patent is granted. Note that regulatory review time can affect the effective market life of protection, and in some cases extensions exist, but the basic start of patent protection is tied to the filing date.