Granted Patent
Utility
US 5,112,540 · App. 07/450,709
Method of making microcapsules having an improved pre-wall
Inventors:
Jing-Den Chen, Kerry Kovacs, Margaret T. Thomas, Rong-Chang Liang
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Dec 14, 1989
Inventors
Jing-Den Chen
Kerry Kovacs
Margaret T. Thomas
Rong-Chang Liang
Assignee (at issue)
The Mead 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.