Granted Patent
Utility
US 5,223,220 · App. 07/917,800
Solid phase immunoassay device and method of making same
Inventors:
Eugene Fan, Sinfu Tzeng, Fon-Chiu Mia Chen, Ching Huang, Dou-Mei Wang, Theresa Popejoy
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Jul 20, 1992
Inventors
Eugene Fan
Sinfu Tzeng
Fon-Chiu Mia Chen
Ching Huang
Dou-Mei Wang
Theresa Popejoy
Assignee (at issue)
Pacific Biotech, Inc.
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.