Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12084353 | Production of green ammonia from thermolyzer gas | Ullrich H. Engel, Charles T. Ludwig, Ernest J. Zavoral, Sr. | 2024-09-10 |
| 11814585 | Multistage thermolysis method for safe and efficient conversion of e-waste materials | Ullrich H. Engel, Charles T. Ludwig, Ernest J. Zavoral, Sr. | 2023-11-14 |
| 11613704 | Multistage thermolysis method for safe and efficient conversion of carpet/rug, polymeric materials and other waste sources | Ullrich H. Engel, Charles T. Ludwig, Ernest J. Zavoral, Sr. | 2023-03-28 |
| 11306255 | Multistage thermolysis method for safe and efficient conversion of e-waste materials | Ullrich H. Engel, Charles T. Ludwig, Ernest J. Zavoral, Sr. | 2022-04-19 |
| 10961461 | Multistage thermolysis method for safe and efficient conversion of e-waste materials | Ullrich H. Engel, Charles T. Ludwig, Ernest J. Zavoral, Sr. | 2021-03-30 |
| 10640711 | Multistage thermolysis method for safe and efficient conversion of treated wood waste sources | Ullrich H. Engel, Charles T. Ludwig, Ernest J. Zavoral, Sr. | 2020-05-05 |
| 10538707 | Multistage thermolysis method for safe and efficient conversion of carpet/rug, polymeric materials and other waste sources | Ullrich H. Engel, Charles T. Ludwig, Ernest J. Zavoral, Sr. | 2020-01-21 |
| 9850433 | Multistage thermolysis method for safe and efficient conversion of E-waste materials | Ullrich H. Engel, Charles T. Ludwig, Ernest J. Zavoral, Sr. | 2017-12-26 |
| 9816033 | Multistage thermolysis method for safe and efficient conversion of carpet/rug, polymeric materials and other waste sources | Ullrich H. Engel, Charles T. Ludwig, Ernest J. Zavoral, Sr. | 2017-11-14 |
| 6072116 | Thermophotovoltaic conversion using selective infrared line emitters and large band gap photovoltaic devices | Zheng Chen | 2000-06-06 |
| 5019176 | Thin solar cell and lightweight array | Irving N. WEINBERG | 1991-05-28 |
| 4608452 | Lithium counterdoped silicon solar cell | Irving N. WEINBERG | 1986-08-26 |