Definition. 1  A blood clot is a thickened mass in the blood formed by tiny substances called platelets. Clots form to stop bleeding, such as at the site of cut. 2  As soon as a blood vessel wall is damagedâby a cut or similar traumaâa series of reactions normally takes place to activate platelets to stop the bleeding.
Series EE bonds mature after 30 years, meaning they can earn interest for that period of time. EE bonds are sold for half of face value and the U.S. Treasury Department guarantees they will reach face value after 20 years. Bonds must be owned for at least one year before redemption.
This is a doubling of the original investment amount. The maturity ages for bonds issued between May 1995 and May 2003 is 17 years. The maturity for bonds issued from March 1993 until April 1994 is 18 years. Bonds issued between November 1986 and February 1993 matured in 12 years.