Siegfried Ltd.
Records under this name other than the patents Siegfried 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 4 patents it holds.
Showing 1 to 9 of 9 · Back to Siegfried Ltd.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,619,088 | Demethylation of 14-hydroxy substituted alkaloid derivatives Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 8,158,793 | Demethylation of 14-hydroxy substituted alkaloid derivatives Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 9,745,249 | Method for the preparation of beta-substituted gamma-amino carboxylic acids 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 |
| US 6,673,838 | Novel Succinate Salt of O-Desmethyl-Venlafaxine Formerly held Term ended Term ended Mar 1, 2022 · High confidence | Term ended | Term ended Mar 1, 2022 | High confidence |
| US 7,187,305 | Encoder for a Motor Controller Formerly held Lapsed on the fee record Ended Mar 6, 2019 · High confidence | Lapsed on the fee record | Ended Mar 6, 2019 | High confidence |
| US 7,872,135 | Method for introducing a 1,2-double bond into 3-oxo-4-azasteroid compounds Lapsed on the fee record Ended Jan 18, 2015 · From the USPTO record | Lapsed on the fee record | Ended Jan 18, 2015 | From the USPTO record |
| US 5,239,121 | Process for the preparation of 2-aryl-1,3-propanediols Term ended Term ended no later than Aug 24, 2013 · Low confidence | Term ended | Term ended no later than Aug 24, 2013 | Low confidence |
| US 5,250,744 | Process for the preparation of 2-aryl-1,3-propanediols Term ended Term ended no later than Oct 5, 2013 · Low confidence | Term ended | Term ended no later than Oct 5, 2013 | Low confidence |
| US 5,439,687 | Dosage forms having zero-order dihydropyridine calcium antagonist release Term ended Term ended no later than Aug 8, 2015 · Low confidence | Term ended | Term ended no later than Aug 8, 2015 | Low confidence |