Well cementing composition containing polymaleic anhydride and having improved flow properties
Patent 3943083 Issued on March 9, 1976. Estimated Expiration Date: 
March 9, 1993. 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.
March 9, 1993. 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 2779417 2790724 3037957 3116264 3140269 3272771 3409080 InventorsApplicationNo. 465938 filed on 05/01/1974US Classes:523/130, Composition for plugging pores in wells or other subterranean formations; consolidating formations in wells or cementing a well or process of preparing166/293, Cement or consolidating material contains inorganic water settable and organic ingredients524/5, Derived from carboxylic acid or derivative524/599From carboxylic acid or derivative reactantExaminersPrimary: Rzucidlo, Eugene C.Attorney, Agent or FirmAbstractAqueous hydraulic cement compositions containing polymaleic anhydride as a flow-property-improving and turbulence-inducing additive and their use in cementing wells is disclosed. | |
