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| Number | Title | Issue Date |
| 4938958 | Antibiotic zeolite An antibiotic zeolite and an antibiotic resin composition containing thereof are provided. The antibiotic zeolite is prepared by replacing all or a part of ion-exchangeable ions in zeolite with ammonium ions and antibiotic metal ions such as silver, coppe... | 07/03/1990 |
| 4906464 | Method for preparing dispersions containing antibiotic power A method for preparing a dispersion containing antibiotic powder comprises mixing the antibiotic powder and a dispersing medium at a temperature at which the dispersing medium is in the form of a liquid under a reduced pressure of not more than 470 Torr. ... | 03/06/1990 |
