Granted Patent
Utility
US 4,032,357 · App. 05/663,600
Easy dispersing alkali blue powder and process for manufacture
Inventors:
Thomas C. Rees, Robert Flores
Patented Case
View Patent ↗
Granted: Jun 28, 1977
Filed: Mar 3, 1976
Inventors
Thomas C. Rees
Robert Flores
Assignee (at issue)
The Sherwin-Williams 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.