Greensboro, N.C.-based Burlington Industries has extended until...

Greensboro, N.C.-based Burlington Industries has extended until June 22 its $80-a-share offer for up to 29% of its own common stock . . . USPCI Inc., an Oklahoma City-based hazardous waste disposal firm, on Monday rejected a $43-a-share takeover offer from Union Pacific Corp. that valued the company at $361 million . . . Baker Hughes Inc. of Houston said the number of working oil and gas rigs in the United States this week totaled 757, a slight decrease from the previous week . . . The Federal Reserve said the average yield for one-year T-bills, the most popular index for making changes in adjustable rate home mortgages, edged down to 6.91% last week after averaging 6.95% the previous week.