Sewage treatment aeration systems
Patent 3953553 Issued on April 27, 1976. Estimated Expiration Date: 
April 27, 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.
April 27, 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 1138228 1457183 1780978 1792928 2221346 2361636 2986382 3424443 3615078 3738628 InventorAssigneeApplicationNo. 554343 filed on 02/28/1975US Classes:261/122.1, Submerged screen285/288.1WeldExaminersPrimary: Miles, Tim R.Assistant: Chiesa, Richard L. Attorney, Agent or FirmAbstractAn aeration system for a sewage treatment plant, including headers having diffuser connectors longitudinally spaced along the header, the connectors having nipples formed thereon which are welded to nipples formed on the header. | |
