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Patent applications and USPTO patent grants for Choi; Myoung-Hee.The latest application filed is for "chrome free coating composition having excellent blackening resistance and corrosion resistance, and surface-treated steel sheet".
Patent | Date |
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Chrome free coating composition having excellent blackening resistance and corrosion resistance, and surface-treated steel sheet Grant 10,457,834 - Kwak , et al. Oc | 2019-10-29 |
Chrome Free Coating Composition Having Excellent Blackening Resistance And Corrosion Resistance, And Surface-treated Steel Sheet App 20170369735 - KWAK; Young-Jin ;   et al. | 2017-12-28 |
Resin composition for a surface treatment, and steel sheet coated with same Grant 9,376,576 - Jung , et al. June 28, 2 | 2016-06-28 |
Film formation composition for preventing blackening of steel sheet, and steel sheet having film formed by composition Grant 9,296,903 - Kwak , et al. March 29, 2 | 2016-03-29 |
Resin Composition for a Surface Treatment, and Steel Sheet Coated with Same App 20140147645 - Jung; Yong-Gyun ;   et al. | 2014-05-29 |
Film Formation Composition For Preventing Blackening Of Steel Sheet, And Steel Sheet Having Film Formed By Composition App 20140011048 - Kwak; Young-Jin ;   et al. | 2014-01-09 |
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