Granted Patent
Utility
US 6,457,612 · App. 09/975,126
Sealable and manipulable pre-filled disposable pipette
Inventors:
Jack Yongfeng Zhang, Mary Zi-ping Luo, Frank Zhishi Xia
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Oct 12, 2001
Inventors
Jack Yongfeng Zhang
Mary Zi-ping Luo
Frank Zhishi Xia
Assignee (at issue)
Amphastar Pharmaceuticals, 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.