expiration date, date on which something loses its validation or utility (i.e. driver's license, food product, etc.)
Last date, unless it is a bank holiday, on which drafts may be presented for payment under a letter of credit If the expiry date is a bank holiday, the last date on which the draft may be presented is the first banking day following the holiday
The last day on which the holder of an option can exercise his right to buy or sell the underlying security
In the case of ethical reviews, the expiry date is one year from the date of approval For animal protocols, approval by the University Animal Care Committee For biosafety, date on which the Biosafety Certificate is issued
The date when a letter of credit is no longer valid - i e the date beyond which it cannot be used
The date when a patent has run its full term in a country and is no longer protected there (see also Lapse & Withdrawn)
Last date on which documents may be presented or corrected in order to comply with a letter of credit Presentation must be made to the bank indicated in the L/C
The date on which a policy reaches the end of its term while the insured is still living
Numbers printed on most film boxes indicating the date before which the material should be processed if it is to maintain its stated speed, contrast, and (if colour) colour balance