Granted Patent
Utility
US 4,299,869 · App. 06/027,436
Protection of substrates against corrosion
Inventors:
Harold V. Casson, Grant G. Crabtree, Bruno Kindl, Edward B. Noonan
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Apr 5, 1979
Inventors
Harold V. Casson
Grant G. Crabtree
Bruno Kindl
Edward B. Noonan
Assignee (at issue)
Huron Chemicals Limited
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.