Answer:
95 years starting from the date of their publication
Step-by-step explanation:
The Copyright Act of 1976 (including its future amendments) is the current law that protects intellectual property in the US. It has been updated several times, the last amendment was done by Congress on March, 2020. It covers literary, dramatic, musical, and artistic works made registered by an individual or by a business. It doesn't cover new ideas, inventions or discoveries (those must be covered by patents if applicable).