Harvey J. Helmin

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Golden Valley, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of making a coated abrasive article comprising a grinding ai...
- Patent number 5,520,711
- Issue date May 28, 1996
- Minnesota Mining and Manufacturing Company
- Harvey J. Helmin
- B24 - GRINDING POLISHING
Information Patent Grant
Abrasive articles comprising a grinding aid dispersed in a polymeri...
- Patent number 5,507,850
- Issue date Apr 16, 1996
- Minnesota Mining and Manufacturing Company
- Harvey J. Helmin
- B24 - GRINDING POLISHING
Information Patent Grant
Abrasive articles comprising a grinding aid dispersed in a polymeri...
- Patent number 5,441,549
- Issue date Aug 15, 1995
- Minnesota Mining and Manufacturing Company
- Harvey J. Helmin
- B24 - GRINDING POLISHING
Information Patent Grant
Coatable mixtures including erodable filler agglomerates, methods o...
- Patent number 5,269,821
- Issue date Dec 14, 1993
- Minnesota Mining and Manufacturing Company
- Harvey J. Helmin
- B24 - GRINDING POLISHING
Information Patent Grant
Abrasive article with conductive, doped, conjugated, polymer coat a...
- Patent number 5,061,294
- Issue date Oct 29, 1991
- Minnesota Mining and Manufacturing Company
- Walter L. Harmer
- B24 - GRINDING POLISHING