Granted Patent
Utility
US 4,797,158 · App. 07/061,493
Flexible grout composition and method
Inventor:
Todd D. Harriett
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Jun 15, 1987
Inventor
Todd D. Harriett
Assignee (at issue)
American Colloid 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.