Teflon is a remarkable substance. It has the best resistance to chemical attack of any polymer, and it can be used at any temperature between -73 C and 260 C with no effect on its properties. It also has a very low coefficient of friction.
A stale dated warrant is an unredeemed warrant which was issued more than six months prior to the current date. A stale dated warrant is expired and the original instrument is no longer negotiable.
A check is generally considered stale dated if it was written more than six months prior to being presented to a bank or other financial institution. At this time, most banks have the option of refusing to deposit or cash the check, according to LegalMatch.