Since Korzybski first formulated it in 1921 as the defining characteristic of humaness, others have used the notion of time-binding in their own formulating or have pointed to some aspect of the phenomena, with or without using the term.
For example, Richard Feynman referred to "time-binding" in answering the question "What is Science" Although time-binding had an important role in his answer to that question he apparently didn't consider it important enough to find out who coined the term. To me that seems like teaching the classical laws of motion and not bothering to mention Galileo or Newton. A physics teacher would not be doing his proper job, in my opinion, if he taught that way. But I get the distinct sense from reading other works by Feynman that he was not well-read or very knowlegable in areas outside of his own work and indeed didn't seem to consider any knowledge outside of physics as very worthwhile or even as science. But he had somehow heard about "time-binding." Curious.