Legally you can, however there is nothing protecting you from having your product idea stolen so its probably not a good idea
To determine if the patent for the product has expired, you should check the United States Patent and Trademark Office (USPTO) database or consult a patent attorney.
you can sell it.
Off patent refers to a status where a pharmaceutical product's patent protection has expired, allowing other manufacturers to produce and sell generic versions of the drug. This typically leads to increased competition and lower prices for consumers. Once a drug is off patent, it can be produced without the original manufacturer's permission, fostering accessibility and affordability in the market.
The fee related to an expired patent is the cost to renew or reinstate the patent after its expiration date has passed.
20 years
Entrepreneur
latent means a hidden something : patent means a document that says that you have the right to make or sell a new product.
Patents protect inventors from having their work copied by others. The work to be protected must be original, useful, and not obvious. An example of this is the popular drug Zocor. It was under patent until June, 2006, so no other company could make and sell that drug. The patent expired and now other companies can sell the drug labeled with its generic name, Simvastatin. Once issued, a patent can be used to prevent others from making, using, selling or importing any product or service that infringes any valid claim in the issued patent, but only in countries where the patent is issued and valid.
Patents protect inventors from having their work copied by others. The work to be protected must be original, useful, and not obvious. An example of this is the popular drug Zocor. It was under patent until June, 2006, so no other company could make and sell that drug. The patent expired and now other companies can sell the drug labeled with its generic name, Simvastatin. Once issued, a patent can be used to prevent others from making, using, selling or importing any product or service that infringes any valid claim in the issued patent, but only in countries where the patent is issued and valid.
Supposedly it expired decades ago...
The patent-adjusted expiration for this product occurs when the patent protection expires.
Lipitor which expired in 2011 was the most valuable patent ever with sales exceeding $105 over the life of the patent.