Minnesota Mining and Manufacturing Company

3m Innovative Properties Company

3m Innovative Porperties Company

Robert D DeMaster

Mark W Weavers

John V Nowicki

Richard E Skare

Alexander R Mitka

Alexander S Sinclair

Robert J DeVoe

Dennis Edward Vogel

Brook F Duerr

Jonathan P Kitchin

A multilayer imageable article with at least two layers including a multiphoton imageable composition. The composition includes a multiphoton-sensitive photoactive system and at least one of a dye and a dye precursor. The photoactive system includes a multiphoton sensitizer capable of simultaneously absorbing at least two photons, an electron acceptor capable of transformation to a dye-activating species upon interaction with the multiphoton sensitizer subsequent to absorption of at least two photons, and optionally an electron donor.

Multicolor imaging using multiphoton photochemical processes

A cassette having a leader and recordable tape which cleans the various components of the tape path in videocassette recorders by dry scrubbing. Interactive diagnostic and instructional material is recorded on the tape to instruct the operator about the cleaning operation to enable the operator to evaluate progress of the head cleaning operation, and to program the maintenance protocol of head cleaning cycles relative to capstan cleaning cycles.

Tape cassette for cleaning VCR heads and transport components

A mat useful, inter alia, to provide traction under the wheels of a vehicle comprises an open-mesh net of strands that are encased around their individual circumferences with a frictional coating that comprises a layer of binder material adhered to the strand and a monolayer of abrasive granules partially embedded in the layer of binder material.

Traction mat

A low-profile raised retroreflective pavement marker that resists loosening and removal from a paved surface comprises a flat dead-soft base sheet and at least one elastically deformable retroreflector attached to one face of the base sheet so as to extend above the base sheet no more than about one centimeter.

Low-profile raised retroreflective pavement marker

Growing community of inventors

Afton, MN, United States of America

Robert D DeMaster