Minerals and methods for their production and use

Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C423S311000

Reexamination Certificate

active

06969501

ABSTRACT:
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.

REFERENCES:
patent: 3679360 (1972-07-01), Rubin et al.
patent: 4149893 (1979-04-01), Aoki et al.
patent: 4612053 (1986-09-01), Brown et al.
patent: 4673355 (1987-06-01), Farris et al.
patent: 4711769 (1987-12-01), Inoue et al.
patent: 4849193 (1989-07-01), Palmer et al.
patent: 4880610 (1989-11-01), Constantz
patent: 4891164 (1990-01-01), Gaffney et al.
patent: 4897250 (1990-01-01), Sumita
patent: 5034352 (1991-07-01), Vit et al.
patent: 5047031 (1991-09-01), Constantz
patent: 5053212 (1991-10-01), Constantz et al.
patent: 5129905 (1992-07-01), Constantz
patent: 5302362 (1994-04-01), Bedard
patent: 5322675 (1994-06-01), Hakamatsuka et al.
patent: 5338334 (1994-08-01), Zhen et al.
patent: 5338356 (1994-08-01), Hirano et al.
patent: 5409982 (1995-04-01), Imura et al.
patent: 5427754 (1995-06-01), Nagata et al.
patent: 5496399 (1996-03-01), Ison et al.
patent: 5522893 (1996-06-01), Chow et al.
patent: 5525148 (1996-06-01), Chow et al.
patent: 5545254 (1996-08-01), Chow et al.
patent: 5939039 (1999-08-01), Sapieszko et al.
patent: 6325987 (2001-12-01), Sapieszko et al.
Abbona, F. et al., “Crystallization of calcium and magnesium phosphates from solutions of medium and low concentrations,”Cryst. Res. Technol.,1992, 27, 41-48.
Brown, P.W. et al., “Variations in solution chemistry during the low temperature formation of hydroxyapaptite,”J. Am. Ceram. Soc.,1991, 74(8), 1848-1854.
Chaair, H. et al., “Precipitation of stoichiometric apatitic tricalcium phosphate prepared by a continuous process,”J. Mater. Chem.,1995, 5(6), 895-899.
Driessens, F.C.M. et al., “Effective formulations for the preparation of calcium phosphate bone cements,”J. Mat. Sci.: Mat. Med.,1994, 5, 164-170.
Famery, R. et al., “Preparation of alpha- and beta-tricalcium phosphate ceramics, with and without magnesium addition,”Ceram. Int.,1994, 20, 327-336.
Fukase, Y. et al., “Setting reactions and compressive strengths of calcium phosphate cements,”J. Dent. Res.,1990, 69(12), 1852-1856.
Greenwood, N.N. et al., “Oxoacids of phosphorus and their salts,” inChemistry of the Elements,Pergamon Press, 1984, 586-595.
Ishikawa, K. et al., “Properties and mechanisms of fast-setting calcium phosphate cements,”J. Mat. Sci.: Mat. Med.,1995, 6, 528-533.
Koutsoukos, P. et al., “Crystallization of calcium phosphates. A constant composition study,”J. Am. Chem. Soc.,1980, 102, 1553-1557.
Lacout, J.L., “Calcium phosphate as bioceramics,” inBiomaterials—Hard Tissue Repair and Replacement,Elsevier Science Publishers, 1992, 81-95.
LeGeros, R.Z., “Biodegradation and bioresorption of calcium phospate ceramics,”Clin. Mat.,1993, 14(1), 65-88.
LeGeros, R.Z., “Preparation of octacalcium phosphate (OCP): A direct fast method,”Calcif. Tiss. Int.,1985, 37, 194-197.
Mirtchi, A. et al., “Calcium phosphate cements: Effect of fluorides on the setting and hardening of beta-tricalcium phosphate—dicalcium phosphate—calcite cements,”Biomat.,1991, 12, 505-510.
Monma, H. et al., “Properties of hydroxyapatite prepared by the hydrolysis of tricalcium phosphate,”J. Chem. Tech. Biotechnol.,1981, 31, 15-24.
Nancollas, G.H., “The involvement of calcium phosphates in biological mineralization and demineralization processes,”Pure Appl. Chem.,1992, 64(11), 1673-1678.
Nancollas, G.H., “In vitro studies of calcium phosphate crystallization,” inBiomineralization Chemical and Biochemical Perspectives,1989, 157-187.
Nancollas, G.H. et al., “Formation and dissolution mechanisms of calcium phosphates in aqueous systems,” inHydroxyapatite and Related Materials,CRC Press, Inc. 1994, 73-81.
Vereecke G. et al., “Calculation of the solubility diagrams in the system Ca(OH)2—H3PO4—KOH—HNO3—CO2—H2O,”J. Cryst. Growth,1990, 104, 820-832.
Wong, A.T.C. et al., “Prediction of precipitation and transformation behavior of calcium phosphate in aqueous media,” inHydroxyapatite and Related Materials,Brown, P.W. et al. (eds.), CRC Press, Inc., 1994, 189-196.
PCT International Search Report dated Apr. 10, 1998, 1 page.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Minerals and methods for their production and use does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Minerals and methods for their production and use, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Minerals and methods for their production and use will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3521567

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.