The length of time that patents are protected after the creator’s death varies depending on the country or jurisdiction in question. In the United States, a patent is generally protected for a period of 20 years from the date of filing, or 17 years from the date of grant, whichever is longer. This means that, for example, if a patent is filed in 2023, it would expire in 2043, and if a patent is granted in 2023, it would expire in 2040. However, there are some exceptions to this general rule. For example, if a patent is for a drug or medical device, the patent protection may be extended for up to 5 years if the FDA approval process takes longer than 3 years.

In the United Kingdom, a patent is generally protected for a period of 20 years from the date of filing. However, there are some exceptions to this general rule. For example, if a patent is for a pharmaceutical product, the patent protection may be extended for up to 5 years if the product is subject to a supplementary protection certificate (SPC).

In Canada, a patent is generally protected for a period of 20 years from the date of filing. However, there are some exceptions to this general rule. For example, if a patent is for a pharmaceutical product, the patent protection may be extended for up to 2 years if the product is subject to a notice of compliance (NOC) from Health Canada.

It is important to note that these are just general guidelines and there are many specific exceptions and nuances to the patent laws of each country. It is always best to consult with a patent attorney if you have any specific questions about patent protection.