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US Patent 4810524 - Inorganic powders with improved dispersibility
US Patent Issued on March 7, 1989
Estimated Patent Expiration Date:
December 2, 2006Estimated 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.
Estimated Patent Expiration Date:
December 2, 2006Estimated 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.AbstractInorganic powders are coated with a thin film of an organic polymer formed on the individual particles by plasma polymerization. The film thickness may be not more than 100 Å, and the inorganic powders include magnetic ones.Other References
| InventorsAssigneeApplicationNo. 06/936992 filed on 12/02/1986US Classes:427/490, Flurocarbon containing coating204/169, Halogenated or oxidized204/170, Gaseous204/171, Acetylene427/213, Fluidized bed utilized427/488, Plasma initiated polymerization428/570Composite powder (e.g., coated, etc.)ExaminersPrimary: Miller, Edward A.Attorney, Agent or FirmUS Patent References3252842, 3725521, 3892610, 3935340, Process for preparing plastic coated metal powdersIssued on: 01/27/1976 Inventor: Yamaguchi , et al.4197347, High density magnetic recording media Issued on: 04/08/1980 Inventor: Ogawa , et al.4202689, Method for the production of sintered powder ferrous metal preform Issued on: 05/13/1980 Inventor: Ohno , et al.4260466, Method of producing magnetic recording medium Issued on: 04/07/1981 Inventor: Shirahata , et al.4268568, Lubricated electrical contacts Issued on: 05/19/1981 Inventor: Sard , et al.4333961, Preparation of thin, aligned magnetic coatings Issued on: 06/08/1982 Inventor: Bruce , et al.4373004, Laser beam-recording media and method for manufacturing the same Issued on: 02/08/1983 Inventor: Asano , et al.4419382, Plasma polymerized color coatings Issued on: 12/06/1983 Inventor: Sliemers , et al.4419404, Magnetic recording media and process of producing them Issued on: 12/06/1983 Inventor: Arai , et al.4422915, Preparation of colored polymeric film-like coating Issued on: 12/27/1983 Inventor: Wielonski , et al.4429024, Method of making antistatic magnetic recording tapes and recording tapes Issued on: 01/31/1984 Inventor: Ueno , et al.4490505, Polyfunctional aziridine crosslinking agents for aqueous magnetic recording media binder Issued on: 12/25/1984 Inventor: Pendergrass, Jr.4495242, Magnetic recording medium Issued on: 01/22/1985 Inventor: Arai , et al.4521482, Magnetic recording medium Issued on: 06/04/1985 Inventor: Arai , et al.4619861Magnetic powders with improved dispersibility Issued on: 10/28/1986 Inventor: Nakayama , et al. International ClassesC09C 3/04 (20060101)H01F 1/032 (20060101) H01F 1/06 (20060101) C08F 2/52 (20060101) C08F 2/46 (20060101) G11B 5/706 (20060101) Foreign Application Priority Data1982-06-18 JP |
