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.
Reputation: 11563. Generally speaking, a check is stale after 6 months absent any other stated time limit on it (sometimes, you'll get a check that is stated to be good for only a few months). You'll not be able to get this old of a check honored at your bank. The best way to collect on it now is to go back to the maker and get them to re-issue the check.