Granted Patent
Utility
US 4,572,869 · App. 05/488,099
Microcapsular opacifiers and method for their production
Inventors:
Marco Wismer, Jerome A. Seiner
Patented Case
View Patent ↗
Granted: Feb 25, 1986
Filed: Jul 12, 1974
Inventors
Marco Wismer
Jerome A. Seiner
Assignee (at issue)
PPG Industries, Inc.
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.