Abstract: A conformable magnetic article for underlayment beneath a traffic-bearing surface which sends a magnetic signal to a sensor traveling over the traffic-bearing structure. The magnetic article comprises at least one conformable magnetic layer comprising a binder and a sufficient amount of magnetic particles dispersed within the binder to provide a magnetic signal through the traffic-bearing structure to a sensor.
Type:
Grant
Filed:
October 15, 1996
Date of Patent:
December 29, 1998
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Gary W. Clark, Thomas J. Dahlin, Richard E. Fayling, Bernard A. Gonzalez, David M. Hopstock, Gregory F. Jacobs, Robert L. Keech
Abstract: A retroreflective element which may be used in pavement markings comprising a core having (a) a central layer having first and second major surfaces and at least one vertical surface, (b) a barrier layer applied to the first major surface, and (c) a barrier layer applied to the second major surface; and a plurality of optical elements embedded in the vertical surface(s) of the central layer.
Type:
Grant
Filed:
February 5, 1996
Date of Patent:
October 13, 1998
Inventors:
Michael C. Palazzotto, Wayne S. Mahoney
Abstract: Compositions containing conductivity enhancers, which are capable of being coated onto a substrate by means of electrostatic assistance. The compositions comprise one or more free-radically curable monomer(s), and one or more non-volatile conductivity enhancer(s), having cationic and anionic portions, which are soluble in the monomer(s) and which do not interfere with free-radical polymerization, wherein said anionic portion is a non-coordinating organophilic carbon-containing anion. The compositions may further comprise one or more initiator(s), one or more dissociation enhancing agent(s), cross-linking agent(s), cationically polymerizable monomer(s), cationic initiator(s), leveling agents, oligomer(s) or polymer(s), preferably co-reactive, and other additives or adjuvants to impart specific properties to the cured coating.
Type:
Grant
Filed:
March 26, 1996
Date of Patent:
October 6, 1998
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Albert I. Everaerts, William M. Lamanna, Albert E. Seaver, George V. Tiers
Abstract: All-ceramic retroreflective elements which may be used in pavement markings comprising an opacified ceramic core and ceramic optical elements partially embedded into the core.
Type:
Grant
Filed:
February 5, 1996
Date of Patent:
June 30, 1998
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
James P. Mathers, Chris J. Goodbrake, Kathleen A. Hachey, Thomas P. Hedblom, Kathleen M. Humpal, Roger W. Lange, David C. May, Kyung H. Moh, Thomas E. Forester