Granted Patent
Utility
US 4,758,612 · App. 06/921,626
Cement-forming compositions
Inventors:
Alan D. Wilson, Havard J. Prosser, David M. Groffman, Gary S. Sayers
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: Oct 21, 1986
Inventors
Alan D. Wilson
Havard J. Prosser
David M. Groffman
Gary S. Sayers
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.