Prayon Technologies
Records under this name other than the patents Prayon Technologies 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 4 of 4 · Back to Prayon Technologies
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,845,990 | Method and Device for Producing Polyphosphoric Acid Lapsed on the fee record Ended Sep 30, 2026 · High confidence | Lapsed on the fee record | Ended Sep 30, 2026 | High confidence |
| US 9,828,471 | Method and Device for Producing Polyphosphoric Acid Lapsed on the fee record Ended Nov 28, 2025 · High confidence | Lapsed on the fee record | Ended Nov 28, 2025 | High confidence |
| US 7,279,030 | Distributor for rotary filter and rotary filter equipped therewith Term ended Term ended Nov 2, 2024 · From the USPTO record | Term ended | Term ended Nov 2, 2024 | From the USPTO record |
| US 8,206,587 | Filtration cell and filtration device using such a cell Lapsed on the fee record Ended Jun 26, 2024 · From the USPTO record | Lapsed on the fee record | Ended Jun 26, 2024 | From the USPTO record |