Larry Lee Rich

US Patent:

6530830, Mar 11, 2003

Filed:

Mar 19, 2001

Appl. No.:

09/812266

Inventors:

Larry D. Rich - Oakdale MN
Galen A. Fitzel - St. Paul MN

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B23F 2103

US Classification:

451548, 451451, 451550, 15230

Abstract:

A sanding disc particularly useful for smoothing drywall. The sanding disc includes a circular abrasive disc having an abrasive surface, and a circular foam disc smaller in diameter than the abrasive disc which is co-axially adhered to the surface of the abrasive disc opposite its abrasive surface. The abrasive disc has a circular central portion along which the surface defined by the abrasive is generally planar, and has an annular peripheral portion extending from its central portion to its peripheral surface along which its surface defined by the abrasive is generally cylindrically convex to position the peripheral surface of the abrasive disc in a plane passing through the foam disc.

US Patent:

6761746, Jul 13, 2004

Filed:

Feb 12, 2003

Appl. No.:

10/365553

Inventors:

Larry D. Rich - Oakdale MN
Galen A. Fitzel - St. Paul MN

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

B24D 1800

US Classification:

51297, 51295, 51307, 51309, 51298, 451548, 451550

Abstract:

A sanding disc particularly useful for smoothing drywall. The sanding disc includes a circular abrasive disc having an abrasive surface, and a circular foam disc smaller in diameter than the abrasive disc which is co-axially adhered to the surface of the abrasive disc opposite its abrasive surface. The abrasive disc has a circular central portion along which the surface defined by the abrasive is generally planar, and has an annular peripheral portion extending from its central portion to its peripheral surface along which its surface defined by the abrasive is generally cylindrically convex to position the peripheral surface of the abrasive disc in a plane passing through the foam disc.

US Patent:

48934364, Jan 16, 1990

Filed:

Feb 25, 1988

Appl. No.:

7/163216

Inventors:

Larry D. Rich - Oakdale MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B24B 2300

US Classification:

51170MT

Abstract:

A back up pad of felted polyurethane foam for use on a vibrating or oscillating sanding device that both efficiently transfers driving forces between the surfaces of the pad to drive a sheet of coated abrasive adhered to its outer surface against a workpiece, and restricts chattering and bouncing of the sanding device on the workpiece.

US Patent:

55279317, Jun 18, 1996

Filed:

Jun 27, 1994

Appl. No.:

8/266116

Inventors:

Larry D. Rich - Oakdale MN
James F. Sanders - St. Joseph Township, St. Croix County WI

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

C07F 710

US Classification:

556413

Abstract:

The present invention relates to organosilane compounds used for treating porous substrates to render them repellent to water-based and oil-based challenges and to enhance the cleanibility of the protected surfaces from such challenges.

US Patent:

58074589, Sep 15, 1998

Filed:

May 15, 1995

Appl. No.:

8/441186

Inventors:

James F. Sanders - Houlton WI
Larry D. Rich - Oakdale MN
Clifford N. MacDonald - Inver Grove Heights MN
L. Max Hurlocker - White Bear Lake MN

Assignee:

Minnesota Mining & Manufacturing Company - St. Paul MN

International Classification:

E04C 507

US Classification:

156276

Abstract:

Methods and articles for reinforcing castable compositions through the use of reinforcing elements maintained in a close-packed alignment in a dispersible containment means.

US Patent:

57025096, Dec 30, 1997

Filed:

Dec 22, 1995

Appl. No.:

8/577643

Inventors:

Mark J. Pellerite - Woodbury MN
Larry D. Rich - Oakdale MN
James F. Sanders - St. Joseph Township WI

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

C09D 500
C09D18308
C09D18307
C09D18306

US Classification:

106 2

Abstract:

A self-emulsifying, liquid treatment composition comprises the polysiloxane reaction product of (a) at least one alkoxysilane, alkoxysiloxane, or siloxane compound comprising at least one hydrophobic moiety selected from the group consisting of alkyl, aryl, aralkyl, and alkaryl moieties; (b) at least one alkoxysilane, alkoxysiloxane, or siloxane compound comprising at least one hydrophilic moiety selected from the group consisting of protonated and unprotonated azaalkyl and silyl-containing azaalkyl moieties; and (c) at least one fluorine-containing alkoxysilane compound which is capable of reaction with component (a) and/or component (b) and which comprises at least one perfluoroalkyl group having at least four carbon atoms and optionally containing one or more catenary ether oxygen atoms. The composition can be used to render substrates, especially porous substrates (e. g. , concrete, wood, or masonry), both water- and oil-repellent.

US Patent:

58979280, Apr 27, 1999

Filed:

Apr 7, 1995

Appl. No.:

8/418906

Inventors:

James F. Sanders - Houlton WI
Larry D. Rich - Oakdale MN
Clifford N. MacDonald - Inver Grove Heights MN
L. Max Hurlocker - White Bear Lake MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

E04C 507

US Classification:

428 3692

Abstract:

Methods and articles for reinforcing castable compositions through the use of reinforcing elements maintained in a close-packed alignment in a dispersible containment means.

US Patent:

47146443, Dec 22, 1987

Filed:

Dec 30, 1986

Appl. No.:

6/947695

Inventors:

Larry D. Rich - Oakdale MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B24D 1100
B32B 310
B32B 518

US Classification:

428136

Abstract:

A sanding pad particularly useful for simultaneously intersecting surfaces that form sanding inside or outside corners. The pad comprises a stiff rectangular backing sheet having through slits along closely spaced parallel lines, with the slits along each line forming most of the line and being spaced by a plurality of unslit parts of the sheet. A coating of abrasive granules is adhered along a first surface of the sheet, and a layer of resiliently compressible foam is adhered on and coextensive with a second surface of the backing sheet which affords bending the backing sheet at about a right angle along one of the lines to deform the foam adjacent the line about which said sheet is bent while retaining in generally planar condition the two portions of the sheet on opposite sides of the line about which the sheet is bent.