Lining of pipelines and passageways
Patent 4622196 Issued on November 11, 1986. Estimated Expiration Date: 
January 7, 2005. 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.
January 7, 2005. 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 3494813 Lining of passageways Method for providing the inner surface of a pipe with a flexible tubular lining material through a liquid resin under pressure Method for internal pipe protection Method for remote lining of side connections Patent #: 4434115 InventorAssigneeApplicationNo. 06/689193 filed on 01/07/1985US Classes:264/229, PRESTRESSING SOLID BODY AND UNITING IN STRESSED CONDITION156/287, To the lining of hollow body156/293, Inserting of lamina in hole, aperture or recess of other lamina and adherence to side walls thereof264/269, Cavity lining type264/516By insertion or application of a preformExaminersPrimary: Czaja, Donald E.Assistant: Fertig, Mary Lynn Attorney, Agent or FirmInternational ClassesB29C 63/34 (20060101)B29C 63/00 (20060101) F16L 58/10 (20060101) F16L 58/02 (20060101) Foreign Application Priority Data1984-01-07 GBAbstractThe invention provides that in inserting a resin impregnated liner into a pipeline or passageway and shaping same to the passageway surface, followed by curing of the resin to form a rigid lining inside the pipeline or passageway, there are placed in the passageway reinforcing circumferential coils or members which bond to the liner and provide extra resistance to compressive hoop stress. | |
