Granted Patent
Utility
US 5,231,127 · App. 07/935,674
Metal titanates as partial replacements for titanium dioxide in pigmented polyvinyl chloride-type compositions
Inventors:
William J. Kroenke, Ervin J. Williger
Patented Case
View Patent ↗
Granted: Jul 27, 1993
Filed: Aug 25, 1992
Inventors
William J. Kroenke
Ervin J. Williger
Assignee (at issue)
B. F. Goodrich Company
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.