Animal Cell From Science Book

images and Animal Cell simulation Cell Simple+earthworm+diagramranand0006-17 10:51 AMHi My H1B expires on sept 30th 2010.(passport has vaild visa also stamped in it till sept 30th) Extension has been applied . If extension is approved say by august, can I go for stamping in august end.Basically how soon can i go for h1b stamping before old stamping expires. If there is a problem in stamping can