Daewoo Engineering & Construction Co., Ltd.
Records under this name other than the patents Daewoo Engineering & Construction Co., Ltd. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned. None of them is counted in the 3 patents it holds.
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| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,367,880 | Device and method for continuous hydrate production and dehydration by centrifugal force Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 8,486,340 | Apparatus and method for continuously producing and pelletizing gas hydrates using dual cylinder Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 9,308,507 | Device for revaporizing natural gas Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 9,255,234 | Device and method for manufacturing natural gas hydrate Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 9,302,239 | Gas-liquid circulating type of hydrate reactor Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 10,351,790 | Apparatus for molding gas hydrate pellets Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 10,023,821 | Method and apparatus for improving heat transfer and reaction efficiency of gas hydrate reactor using scraper Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 11,313,099 | Flexible joint connecting device of precast body segment, precast body segment joining-type underwater tunnel construction method using same, and underwater tunnel constructed thereby Lapsed on the fee record Ended Apr 26, 2026 · From the USPTO record | Lapsed on the fee record | Ended Apr 26, 2026 | From the USPTO record |
| US 9,839,887 | Apparatus for storing gas hydrate pellets Formerly held Lapsed on the fee record Ended Dec 12, 2025 · From the USPTO record | Lapsed on the fee record | Ended Dec 12, 2025 | From the USPTO record |
| US 9,744,508 | Apparatus for revaporizing gas hydrate pellets Formerly held Lapsed on the fee record Ended Aug 29, 2025 · From the USPTO record | Lapsed on the fee record | Ended Aug 29, 2025 | From the USPTO record |