Granted Patent
Utility
US 6,686,035 · App. 09/924,399
Porous inorganic/organic hybrid particles for chromatographic separations and process for their preparation
Inventors:
Zhiping Jiang, Raymond P. Fisk, John E. O'Gara, Thomas H. Walter, Kevin D. Wyndham
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Aug 7, 2001
Inventors
Zhiping Jiang
Raymond P. Fisk
John E. O'Gara
Thomas H. Walter
Kevin D. Wyndham
Assignee (at issue)
Waters Investments Limited
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.