Patents by Inventor Harvey J. Helmin

Harvey J. Helmin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of making a coated abrasive article comprising a grinding aid dispersed in a polymeric blend binder
    Patent number: 5520711
    Abstract: Abrasive articles and methods of making and using same are presented, the abrasive articles having a peripheral surface adapted to contact and abrade a workpiece. The abrasive articles comprise abrasives particles and a grinding aid composition positioned at an effective location in reference to the abrasive particles, the grinding aid composition comprising:a) a cured grinding aid binder comprising a blend of a thermoplastic resin and a thermoset resin, the thermoplastic resin and thermoset resin being present at an effective weight ratio; andb) an effective amount of a grinding aid dispersed in the grinding aid binder.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: May 28, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Harvey J. Helmin
  • Abrasive articles comprising a grinding aid dispersed in a polymeric blend binder
    Patent number: 5507850
    Abstract: Abrasive articles and methods of making and using same are presented, the abrasive articles having a peripheral surface adapted to contact and abrade a workpiece. The abrasive articles comprise abrasives particles and a grinding aid composition positioned at an effective location in reference to the abrasive particles, the grinding aid composition comprising:a) a cured grinding aid binder comprising a blend of a thermoplastic resin and a thermoset resin, the thermoplastic resin and thermoset resin being present at an effective weight ratio; andb) an effective amount of a grinding aid dispersed in the grinding aid binder.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: April 16, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Harvey J. Helmin
  • Abrasive articles comprising a grinding aid dispersed in a polymeric blend binder
    Patent number: 5441549
    Abstract: Abrasive articles and methods of making and using same are presented, the abrasive articles having a peripheral surface adapted to contact and abrade a workpiece. The abrasive articles comprise abrasives particles and a grinding aid composition positioned at an effective location in reference to the abrasive particles, the grinding aid composition comprising:a) a cured grinding aid binder comprising a blend of a thermoplastic resin and a thermoset resin, the thermoplastic resin and thermoset resin being present at an effective weight ratio; andb) an effective amount of a grinding aid dispersed in the grinding aid binder.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: August 15, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Harvey J. Helmin
  • Coatable mixtures including erodable filler agglomerates, methods of preparing same, abrasive articles incorporating cured versions of same, and methods of making said articles
    Patent number: 5269821
    Abstract: Coatable mixtures including erodable filler agglomerates, and abrasive articles into which they may be incorporated are presented, the agglomerates comprising a plurality of individual grains of water insoluble filler agglomerated by an agglomerating agent which includes water soluble filler and a binder. A preferred water soluble filler is Al.sub.2 (SO.sub.4).sub.3.14-18H.sub.2 O, a preferred water insoluble filler is Na.sub.3 AlF.sub.6 (cryolite), while a preferred binder is a phenolic resin. Methods of making coatable mixtures including erodable filler agglomerates are also presented.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: December 14, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Harvey J. Helmin, Walter L. Harmer
  • Abrasive article with conductive, doped, conjugated, polymer coat and method of making same
    Patent number: 5061294
    Abstract: Coated abrasive product contains a conductive, doped, conjugated polymer to reduce the static charge generated during abrading operations.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: October 29, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Walter L. Harmer, Leif Christensen, Gary J. Drtina, Harvey J. Helmin