High strength cured cement article and process for manufacturing the same
Patent 4939191 Issued on July 3, 1990. Estimated Expiration Date: 
February 17, 2008. 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.
February 17, 2008. 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 ReferencesCement compositions Aqueous vinylchloride/vinyl acetate/ethylene copolymers and process Patent #: 4189415 InventorsAssigneeApplicationNo. 156710 filed on 02/17/1988US Classes:524/5, Derived from carboxylic acid or derivative106/692, Aluminous cement (e.g., high alumina, calcium aluminate, etc.)106/727, Organic nitrogen compound524/2Water settable inorganic compound as nonreactive materialExaminersPrimary: Schofer, Joseph L.Assistant: Weber, Tom Attorney, Agent or FirmForeign Patent References
International ClassesC04B 024/24C04B 041/62 Foreign Application Priority Data1987-02-20 JPAbstractA cured cement article containing therein an organic polymer treated with an isocyanate compound has a high flexural strength and high water resistance. The cured cement can be prepared by impregnating a cured cement article containing therein a water-soluble polymer or a water-dispersible polymer with an isocyanate compound. | |
