Aqueously-swelling water stopper and a process of stopping water thereby
Patent 4443019 Issued on April 17, 1984. Estimated Expiration Date: 
April 19, 2002. 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.
April 19, 2002. 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 1206306 2849070 Water proofing compositions for cement mortar or concrete and methods of application therefor Aqueously-swelling water stopper and a process of stopping water thereby Patent #: 4366284 InventorsAssigneeApplicationNo. 06/369625 filed on 04/19/1982US Classes:277/652, Distinct sheath or covering138/89, WITH CLOSURES AND PLUGS277/934, SEAL SWELLS WHEN WET277/944Elastomer or plasticExaminersPrimary: Smith, Robert I.Attorney, Agent or FirmInternational ClassesC09K 3/10 (20060101)E04B 1/68 (20060101) Foreign Application Priority Data1980-10-17 JPAbstractThe disclosed water stopper and water stopping process use an aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is reclaimed rubber, 10 to 20 weight % of silicic compound, 10 to 60 weight % of bentonite, and 10 to 40 weight % of plasticizer. The aforesaid water-stopping composition may be extruded into an elongated water stopper with or without a core therein, which water stopper can be inserted into a joint gap or other gap of structural members to stop water at the gap. | |
