Vita Special Purpose Corporation

Orthovita, Inc.

Minnesota Mining and Manufacturing Company

Imation Corporation

Vita Licensing, Inc.

Ronald S Sapieszko

Erik M Erbe

David H Dychala

Antony Koblish

David M Hopstock

John S Roden

Gunther H Dierssen

Eric M Erbe

Anthony Koblish

Shaped, composite bodies are provided. One portion of the shaped bodies comprises an RPR-derived porous inorganic material, preferably a calcium phosphate. Another portion of the composite bodies is a different solid material, preferably metal, glass, ceramic or polymeric. The shaped bodies are especially suitable for orthopaedic and other surgical use.

Composite shaped bodies and methods for their production and use

Shaped bodies and methods for their production and use

Shaped, preferably porous, inorganic bodies are provided which are prepared from a reactive blend. In accordance with one preferred embodiment, the solution is absorbed into a porous sacrificial substrate such as a cellulose sponge. The solution-saturated substrate is heated and an oxidation-reduction reaction occurs thereby forming an inorganic solid. A shaped, inorganic body is formed in situ. Optional, but preferred additional thermal treatment of the shaped, inorganic body removes the organic substrate, leaving an inorganic body that faithfully mimics the porosity, shape, and other physical characteristics of the organic substrate. Inorganic substrates may also be used to good effect. Large varieties of shaped bodies can be prepared in accordance with other embodiments of the invention and such shapes find wide use in surgery, laboratory and industrial processes and otherwise. The invention also provides chemically and morphologically uniform powders, including those having uniformly small sizes.

Inorganic shaped bodies and methods for their production and use

Uniformly sized and shaped particles of metal salts are provided comprised of one or more metal cations in combination with one or more simple oxoacid anions and a general method for the controlled precipitation of said metal salts from aqueous solutions. The methods proceed via the in situ homogeneous production of simple or complex oxoacid anions in which one or more of the nonmetallic elements e.g. Group 5B and 6B (chalcogenides), and 7B (halides) comprising the first oxoacid anion undergo oxidation to generate the precipitant anionic species along with concurrent reduction of the nonmetallic element of a second, dissimilar oxoacid anion. The oxoacid anions are initially present in solution with one or more metal cations known to form insoluble salts with the precipitant anion.

Minerals and methods for their production and use

Methods for production of calcium phosphate

The present invention provides a hexagonal magnetic ferrite pigment suitable for high density magnetic recording applications. The pigment is characterized by small particle size, a modified magnetoplumbite structure, and relatively high magnetic moment. The pigment is capable of being prepared by firing suitable precursor particles in air at temperatures below 850.degree. C.

Hexagonal magnetic ferrite pigment for high density magnetic recording

Chemically derived leucite is claimed. The chemically derived leucite is obtained from a stable dispersion of a potassia precursor, an alumina precursor and a silica precursor having a specified dry weight solids content. Chemically derived tetragonal leucite is particularly useful as a component of a dental porcelain.

Chemically derived leucite

Process of making hexagonal magnetic ferrite pigment for high density

Growing community of inventors

Woodbury, MN, United States of America

Ronald S Sapieszko