	bp bp starts bid for standard oil srd shares british petroleum co plc said it has started its previously announced billion dlr offer to purchase the pct interest in standard oil co that it does not already own for dlrs per share in a newspaper advertisement the company said the offer which is not conditioned on receipt of any minimum number of shares and associated withdrawal rights will expire april unless extended bp said it is asking standard oil for the use of its shareholder list in disseminating the offer on which the standard board has not yet taken a position reuter 
