Granted Patent
Utility
US 5,252,246 · App. 07/819,397
Nonirritating nonionic surfactant compositions
Inventors:
Shulin Ding, Thao Tran
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Jan 10, 1992
Inventors
Shulin Ding
Thao Tran
Assignee (at issue)
Allergan, 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.