Granted Patent
Utility
US 5,360,771 · App. 08/016,889
Light weight mineral foam and process for preparing the same
Inventors:
Pierre Delvaux, Normand Lesmerises, Daniel Poisson, Marcel Gouin
Patented Case
View Patent ↗
Granted: Nov 1, 1994
Filed: Feb 12, 1993
Inventors
Pierre Delvaux
Normand Lesmerises
Daniel Poisson
Marcel Gouin
Assignee (at issue)
Ceram SNA 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.