Granted Patent
Utility
US 4,569,954 · App. 06/048,385
Dental cement composition comprising poly(carboxylic acid) and chelating agent
Inventors:
Alan D. Wilson, Stephen Crisp
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Jun 14, 1979
Inventors
Alan D. Wilson
Stephen Crisp
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.