 Shares of Corning Inc. GLW, 0.43 were off more than 5 in premarket trading Tuesday after the manufacturer of glass products delivered a lower-than-expected outlook for the current period as it waits to forecast a significant recovery in demand for glass. The company recorded third-quarter net income of 208 million, or 24 cents a share, down from 371 million, or 43 cents a share, in the year-before period. 