Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Preparation of 1,3-cyclic diones by vapor phase cyclization of delta-keto carboxylic acid esters utilizing carrier condensable under ambient conditions

US Patent 4399310 · Granted Aug 16, 1983

Estimated economic value: $4,128,000

Assignee

Inventors

View full patent text on Google Patents →