Robert A Haenggi

6451408, Sep 17, 2002

Apr 2, 1999

09/285349

Dale H. Haunschild - Hudson WI
John L. Ethen - Oakdale MN
Mark D. Zender - Mahtomedi MN
Robert A. Haenggi - Woodbury MN
Larry K. Stump - Hudson WI

3M Innovative Properties Company - St. Paul MN

G02B 512

428143, 428325, 428149, 428166, 428156, 428161, 428162, 428163, 428220, 428343, 359529, 359531, 359532, 359533, 359534, 359537, 359536, 359542, 4271634, 404 14

A retroreflective article that exhibits suitable retroreflective luminance under dry and dynamic wet conditions. The article includes an enclosed-lens retroreflective sheeting that, under dry conditions, exhibits a coefficient of retroreflective luminance of about 40 (millicandela/m )/lux as measured by ASTM D 4061-94 and, under dynamic wet conditions the sheeting increases in coefficient of retroreflective luminance. The article further includes a plurality of retroreflective elements partially embedded in a light transmissible bonding layer on the front, reflective surface of the retroreflective sheeting.

51241781, Jun 23, 1992

Jul 9, 1991

7/727471

Robert A. Haenggi - Woodbury MN
James A. Laird - St. Joseph Township, St. Croix County WI

Minnesota Mining and Manufacturing Company - St. Paul MN

B05D 136

427204

A skid-resistant, surface marking material is disclosed. The skid-resistant, surface marking material comprises a polymer matrix phase and a plurality of opaque ceramic spheroids partially embedded in and protruding from the top surface of the matrix layer. The ceramic spheroids have rounded surfaces and no substantial points.

50532537, Oct 1, 1991

Jan 22, 1990

7/467988

Robert A. Haenggi - Woodbury MN
James A. Laird - St. Joseph Township, St. Croix County WI

Minnesota Mining and Manufacturing Company - St. Paul MN

B05D 136

427204

A skid-resistant pavement marking sheet including a top surface and a plurality of skid-resistant ceramic spheroids embedded in and protruding from the surface. The ceramic spheroids are fired from a raw material mixture including 10-97 wt. % mineral particulates, 3-90 wt. % alumina, and at least 1 wt. % binder, at a temperature of about 1300. degree. C. , have an outer surface rich in alumina concentration relative to the center of the spheroid, and are resistant to crushing and fracturing.

51941139, Mar 16, 1993

Feb 3, 1992

7/829222

James E. Lasch - Oakdale MN
Gregory F. Jacobs - Woodbury MN
Terry R. Bailey - Woodbury MN
Louis C. Belisle - Oakdale MN
Roger R. Kult - Maplewood MN
Robert A. Haenggi - Woodbury MN
Michael P. Daniels - Hastings MN

Minnesota Mining and Manufacturing Company - Saint Paul MN

B29C 4706

156243

Thermoplastic based pavement marking sheets are disclosed. The marking sheets employ a conformant composite material including: polyolefin and a nonreinforcing mineral particulate; and/or a thermoplastic upper surface. Preferably, the sheet's thermoplastic upper surface is embedded with reflective elements and/or skid-resistant particles. A solventless process of embedding particles in thermoplastic pavement marking sheets is disclosed. Processes for preparing marking sheets are also disclosed. Conformant pavement marking sheets which may be applied in cooler conditions are also disclosed.