Inventor
HOWELLS RICHARD D
US12 patents
⚠️ This page may combine multiple inventors who share the name “HOWELLS RICHARD D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MINNESOTA MINING & MFG
11 patentsUS5025052AJun 18, 1991
Fluorochemical oxazolidinones
MINNESOTA MINING & MFG255 citations97
US5874616AFeb 23, 1999
Preparation of bis (fluoroalkylenesulfonyl) imides and (fluoroalkysulfony) (fluorosulfonyl) imides
MINNESOTA MINING & MFG131 citations95
US4668726AMay 26, 1987
Cationic and non-ionic fluorochemicals and fibrous substrates treated therewith
MINNESOTA MINING & MFG82 citations95
US4566981AJan 28, 1986
Fluorochemicals and fibrous substrates treated therewith: compositions of cationic and non-ionic fluorochemicals
MINNESOTA MINING & MFG103 citations95
US4540497ASep 10, 1985
Fluoroaliphatic radical-containing, substituted guanidines and fibrous substrates treated therewith
MINNESOTA MINING & MFG74 citations95
US4533713AAug 6, 1985
Fluoroaliphaticsulfonamides containing oxirane groups and/or N-β-hydroxyalkylene groups
MINNESOTA MINING & MFG35 citations92
US4582882AApr 15, 1986
Fluorochemical copolymers and ovenable paperboard and textile fibers treated therewith
MINNESOTA MINING & MFG32 citations91
US4525423AJun 25, 1985
Fluorochemical copolymers and ovenable paperboard and textile fibers treated therewith
MINNESOTA MINING & MFG38 citations91
US4474982AOct 2, 1984
1-Halomethyl-2-alkoxyethyl acrylates and methacrylates
MINNESOTA MINING & MFG8 citations73
US4625069ANov 25, 1986
Fluorochemical rhodium compounds
MINNESOTA MINING & MFG2 citations62
US4556720ADec 3, 1985
Fluorochemical rhodium compounds
MINNESOTA MINING & MFG0 citations52