Granted Patent
Utility
US 4,876,303 · App. 07/326,347
Mineral-oil-free encapsulant composition
Inventors:
John T. Chapin, Raffaele A. Sabia
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Mar 21, 1989
Inventors
John T. Chapin
Raffaele A. Sabia
Assignee (at issue)
American Telephone and Telegraph Company, AT&T Bell Laboratories
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.