Granted Patent
Utility
US 4,814,142 · App. 07/053,079
Test strip having a non-particulate dialyzed polymer layer
Inventor:
John M. Gleisner
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: May 22, 1987
Inventor
John M. Gleisner
Assignee (at issue)
Polymer Technology International 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.