till when can i travel after visa issue
You may use your visa to travel to the United States until the date it expires. However, if your visa says that it is valid indefinitely, you should apply for a new visa, or travel under the Visa Waiver Program (VWP) if eligible as all indefinitely-valid visas are now obsolete.See further down this page.he period of validity of a visa relates only to the time in which you may travel to the United States and apply for admission; it does not determine how long you may remain in the country. This is a matter for the immigration officer at the port of entry.