Chromic acid-fluoride anodizing surface treatment for titanium
Patent 4473446 Issued on September 25, 1984. Estimated Expiration Date: 
January 6, 2003. 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.
January 6, 2003. 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 ReferencesMethod of anodizing titanium to promote adhesion Patent #: 3959091 InventorsAssigneeApplicationNo. 06/456265 filed on 01/06/1983US Classes:205/212, Predominantly titanium, vanadium, zirconium, niobium, hafnium, tantalum, molybdenum, or tungsten substrate205/220, Treating electrolytic or nonelectrolytic coating after it is formed205/322, Predominantly titanium, vanadium, zirconium, niobium, hafnium, or tantalum substrate205/333, Oxide-containing coating (e.g., lead dioxide, etc.)428/472Refractory metal salt or oxideExaminersPrimary: Andrews, R. L.Attorney, Agent or FirmInternational ClassesC25D 11/26 (20060101)C25D 11/02 (20060101) AbstractA method for surface treating titanium articles prior to adhesive bonding by anodization in a chromic-hydrofluoric acid bath at a low anodizing potential of greater than one volt but less than five volts. |
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