Failing to diligently complete an invention (or failing to document diligence)

Delaying the filing of a U.S. patent application more than 1 year after an enabling disclosure of the invention is published

Delaying the filing of a U.S. patent application more than 1 year after secretly offering for sale or selling a product embodying an invention

Delaying the filing of a U.S. patent application more that 1 year after using the invention in public

Failing to document monitoring of an experimental public use or sale