Granted Patent
Utility
US 4,194,989 · App. 05/963,716
Piperidinyl hydrogen 2-hydroxyalkyl phosphates and metal salts thereof which compounds are useful as ultraviolet stabilizers for organic compositions
Inventors:
Gether Irick, Jr., Richard H. S. Wang
Patented Case
View Patent ↗
Granted: Mar 25, 1980
Filed: Nov 27, 1978
Inventors
Gether Irick, Jr.
Richard H. S. Wang
Assignee (at issue)
EASTMAN KODAK COMPANY
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.