Expiration management method and system

An RFID tag reader comprising a processor coupled to a computer-readable memory unit, said RFID tag reader located within an enclosure, said memory unit comprising instructions that when executed by the processor implements an expiration management method, said method comprising:

• transmitting, by said RFID tag reader in response to first opening said enclosure, a plurality of continuous timing signals, wherein said enclosure comprises a container comprising a product, wherein said container is internal to said enclosure, wherein said container comprises an RFID tag mechanically attached to said container, and wherein said RFID tag comprises first data indicating a first state for said RFID tag, wherein said first state indicates that said container is new and has never been opened, and wherein said first data comprises a first time period;
• receiving, by said RFID tag reader from said RFID tag, said first data;
• generating, by said RFID tag reader in response to said container being opened a first time, a first time stamp;
• transmitting, by said RFID tag reader to said RFID tag in response to said container being opened said first time, a first message, wherein said first message commands said RFID tag to enter a second state, wherein said second state indicates that said container has been opened said first time;
• transmitting, by said RFID tag reader to said RFID tag in response to said container being opened said first time, said first time stamp, wherein said first time stamp is stored in said RFID tag, wherein said first container has been closed;
• generating, by said RFID tag reader in response to said container being opened a second time, a second time stamp, wherein said second time stamp indicates a later time than said first time stamp;
• transmitting, by said RFID tag reader to said RFID tag in response to said container being opened said second time, said second time stamp, wherein said RFID tag performs a comparing process comprising comparing said second time stamp to a sum of said first time stamp and said first time period;
• receiving, by said RFID tag reader from said RFID tag, results of comparing process;
• and
• performing, by said RFID tag reader, a function indicating said results.