Diamond Engineering Co., Ltd.
Records under this name other than the patents Diamond Engineering 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.
Showing 1 to 3 of 3 · Back to Diamond Engineering Co., Ltd.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,603,339 | Activated sludge material, method for reducing excess sludge production in bioreactor, and method of controlling bioreactor Lapsed on the fee record Ended Dec 10, 2021 · From the USPTO record | Lapsed on the fee record | Ended Dec 10, 2021 | From the USPTO record |
| US 4,222,769 | Process of regenerating and recovering lead sulphate-containing wastes Term ended Term ended no later than Sep 16, 2000 · Low confidence | Term ended | Term ended no later than Sep 16, 2000 | Low confidence |
| US 5,285,735 | Control apparatus for injection quantity of pulverized coal to blast furnace Term ended Term ended no later than Feb 15, 2014 · Low confidence | Term ended | Term ended no later than Feb 15, 2014 | Low confidence |