Granted Patent
Utility
US 6,284,005 · App. 09/239,441
Sodium carbonate recrystallization
Inventors:
Wayne C. Hazen, Dale Lee Denham, Jr., Rudolph Pruszko, David R. Baughman, Ralph B. Tacoma
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Jan 28, 1999
Inventors
Wayne C. Hazen
Dale Lee Denham, Jr.
Rudolph Pruszko
David R. Baughman
Ralph B. Tacoma
Assignee (at issue)
Environmental Projects, 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.