----------------------Critical25 said:1. Not much time....Generally 1-5 months.
2.Sorry to say..Maximum duration for any H visa is 6 yrs period. However your spouse can get year-year extension on his H1 visa (applied for LC 365 days prior). Anyhoo..you can get your h4 ext along with your spouse's h1 ext.
Eventhough you transfer your H4 status to H1 that is valid till Feb 2005. After that you should come back to H4 status.