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.
BREAKING DOWN 'Put Warrant'. There are two types of warrants - put warrants and call warrants. All warrants have an expiration date - the last day that the rights of the warrant can be exercised. If a warrant is not exercised before the end of its fixed tenure, it expires worthless.