[monochromatic]

Why wouldn't the continuation (or CIP as you might have meant) expire at the same time as the original? Same priority date, so unless it's old enough to fall under the 17-years-from-issuance regime...

[md2be]

BC under old rule, the term was 17 years from issue date (not filing date)

[monochromatic]

Yeah but that changed a long time ago. There aren't many patents still in force that have a term calculated under the old rule.