Concentrators for recovering liquid pollutant floating on the surface of a sheet of water
Patent 4057498 Issued on November 8, 1977. Estimated Expiration Date: 
November 8, 1994. 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.
November 8, 1994. 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 3523611 3653510 3664505 3771662 3779385 3815742 InventorApplicationNo. 05/663540 filed on 03/03/1976US Classes:210/170, Geographic (e.g., drainage ditch, septic, pond)210/242.3, With oil water skimmer210/776, Skimming210/923, Using mechanical means (e.g., skimmers, pump, etc.)405/63Floating barrierExaminersPrimary: Granger, Theodore A.Attorney, Agent or FirmInternational ClassE02B 15/04 (20060101)Foreign Application Priority Data1975-03-06 FRAbstractThis invention relates to a concentrator for the recovery of a water-immiscible liquid pollutant floating on the surface of a sheet of water, which comprises a duct of flexible material having an inlet orifice with a larger and a small dimension along mutually perpendicular axes for locating with its larger dimension substantially parallel to the surface of the sheet of water, the shape of the duct varying along its length such that at its end remote from the inlet orifice it has a section with a larger and a smaller dimension along mutually perpendicular axes, its larger dimension being in a plane substantially perpendicular to the surface of the sheet of water when the larger dimension of the inlet orifice is parallel to the surface of the sheet of water, and at least one outlet orifice for the outflow of the liquid pollutant from the concentrator, and to systems using such concentrators. | |
