Preferred Share Purchase Rights

12 Months Ended

Dec. 31, 2011

Preferred Share Purchase Rights: [Abstract]

Preferred Stock [Text Block]

Preferred Share Purchase Rights:

On June 27, 2005, the Board of Directors of the Company adopted a Stockholder Rights Plan (the “Rights Plan”) and declared a dividend distribution of one Preferred Share Purchase Right (a “Right”) on each outstanding share of Company common stock. Each right entitles stockholders to buy one one-thousandth of a share of newly created Series A Junior Participating Preferred Stock of Rudolph at an exercise price of $120. The Company’s Board of Directors is entitled to redeem the Rights at $0.001 per Right at any time before a person has acquired 15% or more of the outstanding Rudolph common stock.

Subject to limited exceptions, the Rights will be exercisable if a person or group acquires 15% or more of Rudolph common stock or announces a tender offer for 15% or more of the common stock. Each Right other than Rights held by the acquiring person, which will become void, entitles its holder to purchase a number of common shares of Rudolph having a market value at that time of twice the Right’s exercise price.

The RightsPlan is scheduled to expire in 2015.