Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Phosphonium compounds, a process for their preparation and a process for the preparation of asymmetrically substituted stilbene fluorescent brightening agents

Phosphonium compounds, a process for their preparation and a process for the preparation of asymmetrically substituted stilbene fluorescent brightening agents

US Patent 4316860 · Granted Feb 23, 1982

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Process for the preparation of a very pure commercial form of 4,2',4'-trichloro-1984
Phosphonium compounds, a process for their preparation and a process for the pre1983
Phosphonium compounds, a process for their preparation and a process for the pre1980