O. Alfred Barton

HC Hoechst Celanese: 2 patents #300 of 871Top 35%

AH American Hoechst: 1 patents #61 of 142Top 45%

Overall (All Time): #1,671,084 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4842950	Overlay proofing film	—	1989-06-27
4748101	Overlay proofing film	—	1988-05-31
4634652	Overlay light-sensitive proofing film with transparent aluminum oxide and transparent magnesium fluoride layers therein	—	1987-01-06