Granted Patent
Utility
US 4,326,891 · App. 06/151,856
Crystalline calcium carbonate as a diluent in hydrothermally cured hydraulic cement compositions
Inventor:
Thomas H. Sadler
Patented Case
View Patent ↗
Granted: Apr 27, 1982
Filed: May 21, 1980
Inventor
Thomas H. Sadler
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.