Details of the suit were not made available, but it was thought to challenge the company's anti-takeover provisions.

Moreover, dozens of energy companies now have anti-takeover provisions.

That meeting was initially aimed at lifting the anti-takeover provisions so the tender offer could close.

Pennsylvania law has strong anti-takeover provisions that tend to favor the board of a target company.

The anti-takeover provision, he said, would slow the process and allow the board to get a better price for shareholders.

Shaklee's anti-takeover provisions come into play when an investor reaches 15 percent.

The Senate Finance Committee is also working on a tax bill, which so far does not include anti-takeover provisions.

Boeing also said its board had adopted anti-takeover provisions today, although it did not indicate whether this was a response to the Pickens move.

The plan contains all kinds of anti-takeover provisions and would establish a new board.

The company adopted several anti-takeover provisions last May.