Granted Patent
Utility
US 4,407,897 · App. 06/101,703
Drying agent in multi-layer polymeric structure
Inventors:
Christopher John Farrell, Boh C. Tsai, James A. Wachtel
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Dec 10, 1979
Inventors
Christopher John Farrell
Boh C. Tsai
James A. Wachtel
Assignee (at issue)
American Can Company
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.