Catherine Hettinger filed a patent for a spinning toy back in 1993, but she tragically let the patent officially expire in 2005 simply because she couldn't afford the paltry four-hundred-dollar renewal fee.

A patent protects claims, not every version of an idea

A patent gives its owner a time-limited right to stop others from making or selling the invention as it is specifically described in the patent’s claims—the legal boundaries of what the inventor says is new. It does not automatically cover every toy that spins. Manufacturers can often sell designs that work differently or fall outside those claims, even while a related patent remains active.

Hettinger’s patent for a spinning toy was granted in 1997. To keep a U.S. patent in force, its owner must pay maintenance fees at set intervals. When a required fee is not paid, the patent can expire before its full term. Hettinger later said she could not afford the $400 payment due in 2005.

What expiration changed

Once the patent expired, its claims could no longer be used to exclude competitors. That removed a legal barrier to making and selling products covered by those claims; it did not hand one company exclusive control of the broader idea, nor did it guarantee that every later spinner was a copy of the patented design.

The distinction matters because a patent’s value depends on more than having invented something. An owner must also maintain the patent and, if necessary, enforce it—steps that can cost money. By the time fidget spinners became a worldwide craze more than a decade later, the expired patent could not give Hettinger a share of sales through exclusive rights. A small maintenance payment helped determine who could freely compete when the market finally arrived.