Prayon
Records under this name other than the patents Prayon 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 5 patents it holds.
Showing 1 to 10 of 10 · Back to Prayon
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 9,902,658 | Iron-Based Nutritive Composition Lapsed on the fee record Ended Feb 27, 2026 · High confidence | Lapsed on the fee record | Ended Feb 27, 2026 | High confidence |
| US 9,287,558 | Lithium batteries containing lithium-bearing iron phosphate and carbon Lapsed on the fee record Ended Mar 15, 2024 · From the USPTO record | Lapsed on the fee record | Ended Mar 15, 2024 | From the USPTO record |
| US 8,703,332 | Lithium Batteries Containing Lithium-Bearing Iron Phosphate and Carbon Lapsed on the fee record Ended Apr 22, 2022 · High confidence | Lapsed on the fee record | Ended Apr 22, 2022 | High confidence |
| US 3,970,741 | Method for purifying phosphoric acid Term ended Term ended no later than Jul 20, 1996 · Low confidence | Term ended | Term ended no later than Jul 20, 1996 | Low confidence |
| US 4,129,454 | Iron oxide based pigment and process for preparing such a pigment Term ended Term ended no later than Dec 12, 1998 · Low confidence | Term ended | Term ended no later than Dec 12, 1998 | Low confidence |
| US 4,172,791 | Multiple cell filter having a gas discharge Term ended Term ended no later than Oct 30, 1999 · Low confidence | Term ended | Term ended no later than Oct 30, 1999 | Low confidence |
| US 4,176,160 | Process for purifying a zinc sulfate solution Term ended Term ended no later than Nov 27, 1999 · Low confidence | Term ended | Term ended no later than Nov 27, 1999 | Low confidence |
| US 4,188,366 | Manufacture of phosphoric acid Term ended Term ended no later than Feb 12, 2000 · Low confidence | Term ended | Term ended no later than Feb 12, 2000 | Low confidence |
| US 4,252,775 | Process for treatment of residues from ferriferous zinc ores Term ended Term ended no later than Feb 24, 2001 · Low confidence | Term ended | Term ended no later than Feb 24, 2001 | Low confidence |
| US 4,330,404 | Multiple cell filter with baffles Term ended Term ended no later than May 18, 2002 · Low confidence | Term ended | Term ended no later than May 18, 2002 | Low confidence |