Granted Patent
Utility
US 4,622,307 · App. 06/738,820
Low shrinkage kaolin refractory fiber and method for making same
Inventors:
William C. Miller, Leonard E. Olds
Patented Case
View Patent ↗
Granted: Nov 11, 1986
Filed: May 29, 1985
Inventors
William C. Miller
Leonard E. Olds
Assignee (at issue)
Manville 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.