Granted Patent
Utility
US 4,810,787 · App. 06/890,333
Phase separation of polysaccharides from aqueous solutions
Inventors:
Michael J. Garvey, Ian C. Griffiths
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Jul 29, 1986
Inventors
Michael J. Garvey
Ian C. Griffiths
Assignee (at issue)
Internationale Otrool Maatschappij Octropa B.V.
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.