Granted Patent
Utility
US 6,495,659 · App. 09/741,933
Sterically hindered poly(ethylene glycol) alkanoic acids and derivatives thereof
Inventors:
Michael D. Bentley, Xuan Zhao, Xiaoming Shen, Lihong Guo
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: Dec 20, 2000
Inventors
Michael D. Bentley
Xuan Zhao
Xiaoming Shen
Lihong Guo
Assignee (at issue)
Shearwater Corporation
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.