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.
Issued for an incorrect amount. Checks are valid for 90 days from the date on the check. After 90 days, the check is considered Stale dated, and a new check must be re-issued. It is not necessary to place a stop payment on a stale dated check.