Aquarium water treatment apparatus
Patent 3983843 Issued on October 5, 1976. Estimated Expiration Date: 
October 5, 1993. 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 5, 1993. 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 3525435 3540593 3566840 3731090 3892199 InventorApplicationNo. 05/540739 filed on 01/13/1975US Classes:119/259, Filter119/231, Water treatment compositionD23/209Filter or strainer (2)ExaminersPrimary: Chamblee, Hugh R.Attorney, Agent or FirmInternational ClassA01K 63/04 (20060101)AbstractAn apparatus for treating aquarium water to thereby reduce the amount of water contaminants and microorganisms harmful to the aquarium fauna. A unitary water treatment device is situated in a generally concealed location along the top of the aquarium frame and is constructed to provide an interchangeable filter and adjacent heating and sterilizing components. | |
