Granted Patent
Utility
US 4,806,590 · App. 07/052,002
Aqueous-based sealant compositions
Inventors:
John Christopher Padget, Donald H. McIlrath
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: May 20, 1987
Inventors
John Christopher Padget
Donald H. McIlrath
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.