Drip irrigation conduit and method of making the same
Patent 4474330 Issued on October 2, 1984. Estimated Expiration Date: 
October 2, 2001. 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 2, 2001. 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 Re28095 3080124 Irrigation device Flexible multilayer tubular structure for irrigation and process for its preparation Three layer irrigation tube and apparatus and method for producing same Irrigation hose and method for its construction Continuous drip irrigation tube Patent #: 4269357 InventorAssigneeApplicationNo. 06/275837 filed on 06/22/1981US Classes:239/450, ADJOINED CONTIGUOUS ELONGATED SPRAY CONDUITS (E.G., PARALLEL CONDUITS)239/542CONDUIT OR NOZZLE ATTACHED IRRIGATION-TYPE DECELERATORExaminersPrimary: Kashnikow, AndresAttorney, Agent or FirmInternational ClassA01G 25/02 (20060101)AbstractAn irrigation conduit comprising an extruded tube having a peripheral wall and at least one elongated passage and an elongated supply tube having an elongated supply passage. The supply tube is formed of sheet material joined together along longitudinally extending portions to form a seam. A region of the sheet material extends at least part way around the perimeter of the extruded tube, and the extruded tube is retained on such region of the sheet material. Transfer ports extend between the passages of the two tubes and discharge ports extend from the passage of the extruded tube to the exterior of the irrigation conduit. | |
