Granted Patent
Utility
US 4,889,838 · App. 06/564,374
Redistribution of organohalosilanes utilizing heat treated crystalline alumina catalysts
Inventors:
Kenrick M. Lewis, Ching-Feng Chang
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Dec 22, 1983
Inventors
Kenrick M. Lewis
Ching-Feng Chang
Assignee (at issue)
Union Carbide Corporation and Plastics Company Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.