RF

Robert B. Fletcher

3M: 3 patents #31 of 952Top 4%
🗺 Michigan: #141 of 4,313 inventorsTop 4%
Overall (1994): #9,328 of 165,921Top 6%
3
Patents 1994

Issued Patents 1994

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5352785 Continuous process for purifying perfluorochemical compositions Thomas C. Herzberg, Randall F. Henderson 1994-10-04
5338368 Method for removing oil or asphalt from inorganic particles having pigment in an outer layer thereof Wilson S. Bigham, Phyllis F. Albert 1994-08-16
5300714 Method of purifying saturated fluoroperhalocarbon liquids Venkateswarlu Pothapragada, Donald F. Hagen, Frederick E. Behr 1994-04-05