By Ainsley Thomson Of DOW JONES NEWSWIRES LONDON (Dow Jones)--Construction and mining equipment maker Caterpillar Inc. (CAT) is planning a three-year, EUR300 million, senior, unsecured bond, a person familiar with the matter said Thursday. The bond will be issued by Caterpillar International Finance Ltd. and guaranteed by Caterpillar's financial arm Caterpillar Financial Services Corporation. The Royal Bank of Scotland Group PLC and Societe Generale SA are joint lead managers on the deal, which is expected to price later Thursday. Caterpillar is rated A2 by Moody's Investors Service Inc. and A by Standard & Poor's Corp. and Fitch Ratings. -By Ainsley Thomson, Dow Jones Newswires; 44 20 7842 9318; [email protected] (Alessandro Pasetti in London contributed to this report) (END) Dow Jones Newswires June 10, 2010 05:23 ET (09:23 GMT)