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.
R.G., Cleveland. A: There is no federal banking law about stale checks that indicates checks with certain dates aren't good. Banks won't necessarily reject any check because of the date on it. It's a myth that banks won't accept checks more than six months old or that carry a future date. (This is why post-dating a check protects you from exactly nothing.) Banks accept or decline checks based on whether they think the check is good.