Granted Patent
Utility
US 4,215,990 · App. 05/896,382
Peroxygen bleaching and laundering compositions
Inventors:
John H. Barrett, Elizabeth F. Formeloza
Patented Case
View Patent ↗
Granted: Aug 5, 1980
Filed: Apr 14, 1978
Inventors
John H. Barrett
Elizabeth F. Formeloza
Assignee (at issue)
PUREX CO., LTD.
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.