| 4 | Urea synthesis from greenhouse gas and nitrogen via transition metal-free catalysis over graphitic carbon nitride H. H. Hammud, K. Ayub, M. Yar, N. S. Sheikh, R. K. Karnati, D. E. Al-Hudairi U.S. 2024/0368074 A1, November 07, 2024. |
| 3 | Antioxidant vitamin C derivative I. Bayach, A. Ibrahim, N. S. Sheikh, K. Ayub U.S. 11897855 B1, February 13, 2024. |
| 2 | Spirooxindole-copper complex as novel efficient anticorrosion agent for C-steel H. H. Hammud, W. A. S. Aljamhi, A. Elfaham, A. Barakat, I. Shawish, N. S. Sheikh, K. Ayub U.S. 11840545 B1, December 12, 2023. |
| 1 | Novel curcumin derivative with enhanced antioxidant properties I. Bayach, N. S. Sheikh U.S. Patent 18/508,977, filed November 14, 2023. Patent pending |