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: The expiration date is the date an item is ensured to be edible. A sell-by date is the date the stores are suggesting to take an item off the shelves. We have began to phase out 'sell-by' dates and date our products with a 'Best By', which can be interpreted the same as a expiration date.