High molecular weight polyacrylamide synthesis
Patent 4617359 Issued on October 14, 1986. Estimated Expiration Date: 
November 15, 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.
November 15, 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 2510008 Redox catalyst oxidant, catalyst and polymerization therewith Polymerization process for preparation of acrylamide homopolymers with redox catalyst Process for the aqueous polymerization of acrylamide Patent #: 4473689 InventorAssigneeApplicationNo. 06/798545 filed on 11/15/1985US Classes:526/93, Group VIII transition metal (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt)526/173Material contains elemental alkali metal, hydride thereof, or alkali metal to carbon atom bond (Li, Na, K, Rb, Cs, Fr)ExaminersPrimary: Schofer, Joseph L.Assistant: Kulkosky, Peter F. Attorney, Agent or FirmInternational ClassesC08F 20/00 (20060101)C08F 20/56 (20060101) AbstractThis invention discloses a process for the polymerization of acrylamide and for the copolymerization of acrylamide with other monomers. It employs a ferrous/hydroperoxide redox initiator system that greatly enhances the molecular weight of the polymer formed. These high molecular weight acrylamide polymers offer outstanding advantages in enhanced oil recovery as injection water viscosifiers.Other References
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