Granted Patent
Utility
US 4,689,118 · App. 06/757,569
Cross-linked pore containing microfibrillated cellulose prepared by freezing and solvent exchange
Inventors:
Kambiz B. Makoui, Pronoy K. Chatterjee
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Jul 22, 1985
Inventors
Kambiz B. Makoui
Pronoy K. Chatterjee
Assignee (at issue)
Personal Products 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.