HH

Harvey J. Helmin

3M: 5 patents #2,937 of 11,543Top 30%
Overall (All Time): #1,055,221 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5520711 Method of making a coated abrasive article comprising a grinding aid dispersed in a polymeric blend binder 1996-05-28
5507850 Abrasive articles comprising a grinding aid dispersed in a polymeric blend binder 1996-04-16
5441549 Abrasive articles comprising a grinding aid dispersed in a polymeric blend binder 1995-08-15
5269821 Coatable mixtures including erodable filler agglomerates, methods of preparing same, abrasive articles incorporating cured versions of same, and methods of making said articles Walter L. Harmer 1993-12-14
5061294 Abrasive article with conductive, doped, conjugated, polymer coat and method of making same Walter L. Harmer, Leif Christensen, Gary J. Drtina 1991-10-29