It's a alphabetical number system.
From Wikipedia:
The first modern U.S. Savings Bonds were issued in 1935, to replace United States Postal Service Bonds. They were marketed as a safe investment that was accessible to everyone. The first bonds, series A, were followed by series B, C, D, E, EE, F, G, H, HH, and I.
how long does it take for a series 11 boud to mature?
The value of a $50 savings bond from 2004 depends on its type—either a Series EE or Series I bond. Series EE bonds issued in 2004 earn interest for 30 years and have a guaranteed doubling value, meaning they would be worth $100 at maturity in 2034. To find the current value, you can use the U.S. Treasury's savings bond calculator or check the bond's redemption value based on the interest accrued.
The value of a 1998 savings bond depends on its type (Series EE or Series I) and the length of time it has been held. Generally, Series EE bonds issued in 1998 will have doubled in value after 20 years, reaching their full maturity value around 2018. For an accurate current value, you can use the U.S. Treasury's savings bond calculator available on their website.
A $100 savings bond typically refers to a U.S. Series I or Series EE savings bond with a face value of $100. The purchase price for these bonds is often less than the face value, as they accumulate interest over time until they reach that value. For example, a Series EE bond can be purchased for half its face value, so you might pay $50 for a $100 bond. The exact purchase price can vary based on interest rates and the type of bond.
To cash a Series EE bond, you can take it to a bank or financial institution that redeems U.S. savings bonds. You'll need to present the bond along with valid identification. The bank will process the redemption, and you’ll receive the cash value, which includes any interest accrued. Alternatively, you can also redeem the bond through the U.S. Treasury's website if you have a TreasuryDirect account.
The value of a 50 Series EE Patriot bond depends on the denomination of the bond, as well as its maturity date and current interest rate. You can check the value of the bond on the U.S. Department of the Treasury's Savings Bond Calculator website using the bond's serial number.
twenty years
Pretty sure that depends on the interest rate at the time you purchase the EE series bonds. You can look up the value of EE bonds on the internet. You need the bond numbers and it will tell you when it was purchased and the current value and the percentage you are earning.
The value of a Series EE savings bond from 1989 depends on its original purchase price and the interest it has accrued over time. Series EE bonds issued in 1989 were sold for half of their face value, so a $100 bond would have been purchased for $50. As of the current date, you can check the bond’s value, including interest, using the U.S. Department of the Treasury's savings bond calculator or by contacting them directly, as these bonds earn interest for up to 30 years.
how long does it take for a series 11 boud to mature?
The value of a Series EE US Treasury savings bond depends on its original purchase date, interest rate, and current market conditions. You can check the value of your specific bond by using the US Treasury's online Savings Bond Calculator.
The value of a $50 savings bond from 2004 depends on its type—either a Series EE or Series I bond. Series EE bonds issued in 2004 earn interest for 30 years and have a guaranteed doubling value, meaning they would be worth $100 at maturity in 2034. To find the current value, you can use the U.S. Treasury's savings bond calculator or check the bond's redemption value based on the interest accrued.
http://www.treasurydirect.gov/BC/SBCPrice
The value of a 2006 Series EE savings bond depends on its face value and the length of time it has been held. EE bonds earn interest for 30 years, and they are guaranteed to double in value if held for 20 years. To get the exact worth, you can use the U.S. Department of the Treasury's savings bond calculator or check the bond's redemption value online. Generally, a $100 bond purchased in 2006 would be worth approximately $200 after 20 years.
The value of a 1998 savings bond depends on its type (Series EE or Series I) and the length of time it has been held. Generally, Series EE bonds issued in 1998 will have doubled in value after 20 years, reaching their full maturity value around 2018. For an accurate current value, you can use the U.S. Treasury's savings bond calculator available on their website.
A $100 savings bond typically refers to a U.S. Series I or Series EE savings bond with a face value of $100. The purchase price for these bonds is often less than the face value, as they accumulate interest over time until they reach that value. For example, a Series EE bond can be purchased for half its face value, so you might pay $50 for a $100 bond. The exact purchase price can vary based on interest rates and the type of bond.
To cash a Series EE bond, you can take it to a bank or financial institution that redeems U.S. savings bonds. You'll need to present the bond along with valid identification. The bank will process the redemption, and you’ll receive the cash value, which includes any interest accrued. Alternatively, you can also redeem the bond through the U.S. Treasury's website if you have a TreasuryDirect account.