Granted Patent
Utility
US 4,581,338 · App. 06/740,121
Preparation of catalyst supports and materials produced thereby
Inventors:
John S. Robertson, Mildred M. LiPuma, Stephen E. Gross
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: May 31, 1985
Inventors
John S. Robertson
Mildred M. LiPuma
Stephen E. Gross
Assignee (at issue)
Manville Service Corporation
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.