Union Carbide Corp. and its Indian subsidiary deposited $465 million with the Supreme Court ahead of schedule Friday, fulfilling a settlement of all claims and damages arising from the December 1984 Bhopal gas leak disaster.

Two checks were turned over to a five-member Supreme Court bench headed by Chief Justice R.S. Pathak just before it began a hearing on a petition to boost the settlement to $600 million.F.S. Nariman, the lead counsel for Union Carbide, gave Pathak a check from the U.S.-based multinational for $420 million and a rupee draft for the equivalent of $45 million from Union Carbide of India Ltd.