Minnesota Mining and Manufacturing Company

Manley R Johnston

Randall L Knoll

Carl Franzblau

John T Capecchi

William B Isaacson

Donald F Gibbons

Howard M Leibowitz

Vickery Trinkaus-Randall

A corneal prosthesis including an optical element having an optically transparent central portion and an anterior surface capable of supporting a layer of epithelial cells, the optical element being made of optical material having water content between 50% and 90% and a tensile strength greater than 20 kg/cm.sup.2, and a porous outer skirt secured to the periphery of said element, said skirt being sufficiently porous to permit cell ingrowth and tissue attachment. Also disclosed are methods of making, seeding and using corneal implants having epithelial layers thereon and porous implant material of a coherent mass of randomly oriented fibers having an interconnected network of pores.

Surgical method for implanting a corneal implant

Corneal implants and manufacture and use thereof

An improved low-density abrasive of the type wherein abrasive granules are bonded throughout a lofty, porous, compressible, non-woven fibrous web, the fibers bonded to each other and the abrasive granules bonded to the webs by a resin or the fibers of the web being bonded to each other by a first resin and the abrasive granules bonded to the web by a second resin. At least one of the resins employed in the present product is a hard, tough, polyisocyanurate resin having a minimum of 0.5 gram equivalent of isocyanurate per thousand grams of resin, the sum of the urethane plus isocyanurate equivalents being at least 1.3. The resulting product is useful for a wide spectrum of industrial and home abrasives applications.

Low density abrasive utilizing isocyanurate resin

Growing community of inventors

Mahtomedi, MN, United States of America

Manley R Johnston