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| Number | Title | Issue Date |
| 7943856 | Composition for producing printed circuit board and printed circuit board using the same A composition for producing a printed circuit board is provided. The composition includes a polyamic acid having one or two crosslinkable functional groups introduced at one or both ends thereof, a liquid crystal polymer (LCP) or a liquid crystalline thermoset (LCT)... | 05/17/2011 |
| 7887887 | Liquid crystal polyester resin composition and printed circuit board using the same Disclosed herein is a liquid crystal polyester resin composition and a printed circuit board using the composition. The composition comprises a liquid crystal polyester, a polybenzimidazole and an aprotic solvent. The composition exhibits good thermal stability and ... | 02/15/2011 |
| 7655155 | Liquid crystal thermoset monomer or oligomer, thermosetting liquid crystal polymer composition comprising the same and printed circuit board using the same A liquid crystal thermoset (LCT) monomer or oligomer having both ends capped with maleimide having at least one methyl group, represented by Formula 1: wherein R1 and R2 are ea... | 02/02/2010 |
| 7179441 | Method for preparing barium-titanate based powder The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the following steps of precipitation of barium titanyl oxalate (BaTiO(C | 02/20/2007 |
| 6753443 | Preparing method of chiral ester The present invention relates to a process for preparing a chiral ester according to the formula (100): by reacting (i) a racemic alcohol, (ii) a selected ruthenium complex to activate racemization of the racemic alcohol... | 06/22/2004 |
| 6713290 | Process for preparing optically pure (S)-3-hydroxy-γ-butyrolactone The present invention relates to a process for preparing optically pure (S)-3-hydroxy-γ-butyrolactone expressed by the following Formula 1 and more particularly, to a process that enables preparing optically pure (S)-3-hydroxy-γ-butyrolactone economically in large... | 03/30/2004 |
| 6475773 | Method for preparing chiral esters The present invention relates to a method for preparing a chiral ester and more particularly, the method for preparing an optically pure chiral ester from an alkenyl ester at a high yield by mixing and reacting: an alkenyl ester; a ruthenium complex to activat... | 11/05/2002 |
| 6342034 | Process for the preparation of L-carnitine A process for the preparation of L-carnitine using (S)-3-activated hydroxybutyrolactone as a raw material, which is subject to a ring-opening reaction, expoxydation where the chiral center is inversely converted, and nucleophilic substitution of trimethyl... | 01/29/2002 |
| 6288272 | Continuous process for preparing optically pure (s)-3,4-dihydroxybutyric acid derivatives The present invention relates to a continuous process for preparing optically pure (S)-3,4-dihydroxybutyric acid derivatives expressed by the following Formula 1 and more particularly, to the continuous process which enables preparing optically pure (S)-3... | 09/11/2001 |
| 6251642 | Continuous process for preparing optically pure (S)-3-hydroxy-γ-butyrolactone The present invention relates to a continuous process for preparing optically pure (S)-3-hydroxy-γ-butyrolactone expressed by the following Formula 1 and more particularly, to a process which enables preparing optically pure (S)-3-hydroxy-γ-butyrolacton... | 06/26/2001 |
| 6124122 | Process for preparing optically pure (S)-3-hydroxy-γ-butyrolactone The present invention relates to a process for preparing optically pure (S)-3-hydroxy-γ-butyrolactone expressed by the following Formula 1 and more particularly, to a process that enables preparing optically pure (S)-3-hydroxy-γ-butyrolactone economical... | 09/26/2000 |
