Drip irrigation conduit and method of making the same
Patent 4541569 Issued on September 17, 1985. Estimated Expiration Date: 
May 16, 2004. 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.
May 16, 2004. 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 3672571 3698195 Flexible multilayer tubular structure for irrigation and process for its preparation Patent #: 4139159 InventorAssigneeApplicationNo. 06/610960 filed on 05/16/1984US Classes:239/450, ADJOINED CONTIGUOUS ELONGATED SPRAY CONDUITS (E.G., PARALLEL CONDUITS)156/244.19, After bonding; e.g., as finishing step, etc.239/542, CONDUIT OR NOZZLE ATTACHED IRRIGATION-TYPE DECELERATOR264/209.1Hollow articleExaminersPrimary: 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. | |
