Charles K Nmai

Title: Charles K. Nmai and His Concrete Corrosion-Inhibiting Invention.

Introduction

Charles K. Nmai is an inventor associated with Bedford Heights, Ohio, and Sandoz GmbH. His patent work addresses the durability of reinforced concrete by targeting chloride-induced corrosion of steel reinforcement. The available information identifies 1 patent associated with him.

Latest Patents

Nmai’s listed patent is titled “Admixtures for Inhibiting Corrosion of Steel in Concrete.” It describes an admixture designed to inhibit chloride-induced corrosion in steel reinforcing bars embedded in concrete. The formulation is an oil-in-water emulsion: its oil phase includes an unsaturated fatty acid ester, ethoxylated nonyl phenol, and an ester of an aliphatic carboxylic acid with a mono-, di-, or trihydric alcohol. Its water phase includes a saturated fatty acid, an amphoteric compound, a glycol, and a soap. The admixture is added to the concrete before placement.

Career Highlights

Nmai’s documented patent contribution focuses on a practical materials-engineering challenge: protecting steel reinforcement from corrosion caused by chlorides. By incorporating the admixture before concrete placement, the invention is intended to provide corrosion inhibition within the concrete system.

Collaborations

The supplied information names Mark A. Bury and Stephen A. Farrington as Nmai’s coworkers. Their specific roles in developing or patenting the admixture are not stated.

Conclusion

Charles K. Nmai’s listed invention applies a formulated emulsion to help inhibit chloride-induced corrosion in steel-reinforced concrete, reflecting a focused contribution to concrete durability.