▪ US Patent No. 8,828,476 (Pusan National University Industry-University Cooperation Foundation)
발명의 명칭: Polyimide nanocomposite and method for preparing same
대표도면:
대표독립항:
1. A polyimide nanocomposite, characterized in that modified graphene oxide and a polyamic acid are mixed with a solvent to form a mixed solution, and the polyimide nanocomposite is formed by thermal curing of the mixed solution,
wherein the modified graphene oxide is prepared by modifying top and bottom surfaces of plate-shaped graphene oxide with a material comprising amine and having a negative charge.
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▪ US Patent No. 8,969,241 (Pusan National University Industry-University Cooperation Foundation )
발명의 명칭: Organic-inorganic hybrid mesoporous silica material modified by sulfonic acid group for selective adsorption of metal ions and method of manufacturing the same
대표도면:
대표독립항:
1. An organic-inorganic hybrid mesoporous silica material manufactured by using an organic-inorganic hybrid silica precursor and an alkoxy silica source as constituting materials of a porous wall, and a three-element copolymer as a template material for forming a structure, and by performing a self assembling method and a hydrothermal reaction,
wherein said organic-inorganic hybrid silica precursor is prepared from 2,6-diamino pyridine, phosgene, and a silane compound including a functionalized amino group, the organic-inorganic hybrid silica precursor having the following chemical formula:
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▪ US Patent No. 8,834,625 (Ecomaister Co., Ltd. )
발명의 명칭: Ultra-rapid hardening hydraulic binder using reduced slag powder, and method of preparing the same
대표도면:
대표독립항:
1. An ultra-rapid hardening hydraulic binder comprising:
reduced slag powder prepared by rapidly cooling molten electric arc furnace reduced slag, said reduced slag powder having a fineness of 3,000 to 12,000 cm2/g;
wherein said reduced slag powder comprises 40 to 60% by weight of CaO, 5 to 15% by weight of SiO.sub.2, 15 to 25% by weight of Al2O3, and magnesia (MgO, Periclase) of an amount twice to three times greater than that of ordinary Portland cement or ultra-rapid hardening cement, the reduced slag powder not having free calcium oxide (free CaO) therein, wherein said reduced slag powder further comprises mayenite (C12A7, 12CaO•Al203), as a rapid hardening hydrate, and β-C2S (Belite, β-2CaO•SiO2), as a main constituent compound of cement to improve an hydraulicity;
gypsum selected from the group consisting of anhydrous gypsum, natural gypsum, and hemi-hydrated gypsum to control reaction rate of rapid hardening;
wherein the amount of Al2O3 in the reduced slag powder is twice to seven times greater than that of ordinary Portland cement or ultra-rapid hardening cement to substantially improve rapid hardening, early strengthening, corrosion resistance, and fire resistance properties.
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▪ US Trademark No. 3,981,308 (HNS USA INC. CORPORATION)
상표명:
지정상품/지정서비스업:
(IC 005) G & S: Nutritionally fortified beverages containing ginseng.