Method of transporting metal ions
Patent 4180473 Issued on December 25, 1979. Estimated Expiration Date: 
October 21, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 21, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3240701 3365397 3905909 Complexes of heavy metal ions and polyfunctional organic ligands used as antimicrobial agents Patent #: 4055655 InventorsAssigneeApplicationNo. 05/844280 filed on 10/21/1977US Classes:514/499, Copper252/180, Plant or organic material containing514/494, Zinc514/495, Gold or silver514/496, Mercury514/501, Nickel or cobalt514/503, Antimony or bismuth516/75, The compound contains -C(=O)OH or salt thereof (e.g., alkali metal soap) soap)516/919The compound contains -C(=O)OH or salt thereofExaminersPrimary: Loevering, Richard D.Attorney, Agent or FirmInternational ClassesA01N 37/44 (20060101)A01N 37/36 (20060101) A01N 57/20 (20060101) A01N 57/00 (20060101) C07C 59/00 (20060101) C07C 59/265 (20060101) C07F 1/00 (20060101) AbstractA method of transporting metal ions by introducing a metal complex into a medium containing a moiety which demands the metal ion and the complex releases the ions in a controlled manner upon demand. The metal complexes have an aqueous proton induced dissociation property represented by a sigmoidally-shaped curve on a cartesian coordinate plot of the negative log of the metal ion concentration versus the negative log of hydrogen ion concentration. This dissociation property causes a controlled release of metal ion into mediums containing a reacting moiety upon demand for the metal ion. For example, metalworking emulsions of oil and water are stabilized by the addition thereto of minor amounts of a metal complex, e.g., disodium monocopper(II) citrate, which at alkaline pH metalworking conditions above about 7 to about 9 releases metal cations to the emulsions imparting stabilizing characteristics which prevent emulsion degradation by a number of factors commonly encountered in metalworking operations. Also, the method is effective in the controlled release of metal ions in the normal range of physiological pH, i.e., about 4 to 9, for growth controlling action against microorganisms including bacteria, fungi and viruses.Other References
Field of SearchPlant or organic material containing | |
