Drip irrigation system
Patent 4307841 Issued on December 29, 1981. Estimated Expiration Date: 
November 26, 1999. 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 26, 1999. 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 3870236 3882892 Drip or trickle emitter for use in drip or trickle irrigation Irrigation pipes with dripper units and method of its manufacture Drip level irrigation Patent #: 4060200 InventorsApplicationNo. 06/097440 filed on 11/26/1979US Classes:239/542CONDUIT OR NOZZLE ATTACHED IRRIGATION-TYPE DECELERATORExaminersPrimary: Cherry, Johnny D.Attorney, Agent or FirmInternational ClassA01G 25/02 (20060101)Foreign Application Priority Data1977-11-24 ILAbstractA drip irrigation system comprising a thermoplastic conduit having substantially flat, discrete emitter units heat welded to axially spaced apart locations of an inner surface of the conduit adjacent outlet apertures formed in the conduit, the emitter units being preferably provided with an elastomeric membrane exposed to the throughflow pressure in the conduit for the purpose of stabilising the output rate of each emitter unit vis-a-vis possible flow pressure variations in the conduit.Other References
| |
