Granted Patent
Utility
US 6,150,552 · App. 09/343,316
Efficient methods for making tetrahalophthalate esters having excellent purity
Inventors:
Jeffrey A. Schreier, James D. Siebecker, Arthur G. Mack
Patented Case
View Patent ↗
Granted: Nov 21, 2000
Filed: Jun 30, 1999
Inventors
Jeffrey A. Schreier
James D. Siebecker
Arthur G. Mack
Assignee (at issue)
Great Lakes Chemical Corp.
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.