Granted Patent
Utility
US 6,746,528 · App. 10/422,154
High temperature investment material and method for making solid investment molds
Inventors:
Robert A. Horton, Claude H. Watts
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Apr 24, 2003
Inventors
Robert A. Horton
Claude H. Watts
Assignee (at issue)
Precision Metalsmiths, 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.