Until July 21, 1788, the day the Constitution was officially ratified.
The 9th state was New Hampshire, and only 9 were required to ratify in order for the Constitution to take effect. The other 4 states did eventually ratify as well.New Hampshire
9
== == 2 months
The requirement of ratification by nine states (in order for the Constitution to take effect), set by Article Seven of the Constitution, was met when New Hampshire voted to ratify, on June 21, 1788.
9 out of 13 states were needed to ratify the constitution
All 13 states had to ratify the US Constitution for it to take effect.
The Constitutional Convention in which the constitution was created began on May 25, 1787 and its final session was on September 17, 1787. At this time the delegates from each state decided whether to ratify it or not.
three-fourths of the states had to ratify the constitution for it to take effect.
north carolina and rhode island
In 1790 eleven states raitfied the constitution so that it could take effect. It took ten months for them to get eleven states to actually raitfy the constitution.
9