Irrigation hose
Patent 4199106 Issued on April 22, 1980. Estimated Expiration Date: 
July 31, 1998. 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.
July 31, 1998. 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 3361359 3467142 3672571 Drip level irrigation Irrigation means for the uniform distribution of liquid Hoses for irrigation by dripping and the like and the process to manufacture the same Patent #: 4047995 InventorsAssigneeApplicationNo. 05/929414 filed on 07/31/1978US Classes:239/542, CONDUIT OR NOZZLE ATTACHED IRRIGATION-TYPE DECELERATOR239/547DISTRIBUTOR OR NOZZLE IN CIRCUMFERENTIAL WALL OF FLEXIBLE SUPPLY LINEExaminersPrimary: Cherry, Johnny D.Attorney, Agent or FirmInternational ClassA01G 25/02 (20060101)Foreign Application Priority Data1977-08-12 JPAbstractIn an irrigation hose which is produced by melt-sticking double thermoplastic resin film in a plane along longitudinal parallel lines so as to form 2 to 3 passages, one a supply passage and others being constant pressure passages, the supply passage being connected to each constant pressure passage by communicating holes which are formed by non-melt-stuck portions spaced in the melt-stuck line between both passages, and the constant pressure passage having water-irrigating holes which are formed by non-melt-stuck portions spaced in an outside melt-stuck line thereof, the improvement which comprises making small melt-stuck portions in the vicinity of the communicating holes and/or water-irrigating holes. | |
