Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12359373 | Polyvinyl alcohol coated cellulosic products | John Williams, Sian Griffiths, David Lee Meadows | 2025-07-15 |
| 12252607 | Process for manufacture of plasticized homopolymeric polyvinyl alcohol and plasticized polyvinyl alcohol polymer obtained therefrom | John Williams, Sian Griffiths | 2025-03-18 |
| 12139598 | Process and apparatus for manufacture of processable polyvinyl alcohol | John Williams, Sian Griffiths | 2024-11-12 |
| 11884807 | Process and apparatus for manufacture of processable polyvinyl alcohol | John Williams, Sian Griffiths | 2024-01-30 |
| 6363869 | Potassium hydroxide flue gas injection technique to reduce acid gas emissions and improve electrostatic precipitator performance | — | 2002-04-02 |
| 6325003 | Low nitrogen oxides emissions from carbonaceous fuel combustion using three stages of oxidation | Frederick J. Murrell, Edward A. Zawadzki | 2001-12-04 |
| 6325002 | Low nitrogen oxides emissions using three stages of fuel oxidation and in-situ furnace flue gas recirculation | — | 2001-12-04 |
| 6152054 | Method and system for the disposal of coal preparation plant waste coal through slurry co-firing in cyclone-fired boilers to effect a reduction in nitrogen oxide emissions | W. Richard Carson, Todd A. Melick, Todd M. Sommer | 2000-11-28 |
| 6085674 | Low nitrogen oxides emissions from carbonaceous fuel combustion using three stages of oxidation | — | 2000-07-11 |
| 5988081 | Method and system for the disposal of coal preparation plant waste coal through slurry co-firing in cyclone-fired boilers to effect a reduction in nitrogen oxide emissions | W. Richard Carson, Todd A. Melick, Todd M. Sommer | 1999-11-23 |
| 5967061 | Method and system for reducing nitrogen oxide and sulfur oxide emissions from carbonaceous fuel combustion flue gases | Donald K. Morrison, Roy Payne | 1999-10-19 |
| 5458659 | Desulfurization of carbonaceous fuels | — | 1995-10-17 |
| 4652433 | Method for the recovery of minerals and production of by-products from coal ash | Larry A. Rodriguez, Antonio A. Padilla, Ned B. Spake, W. Wes Berry, Rae A. Schmeda | 1987-03-24 |
| 4560391 | Alternative fuel comprised of sewage sludge and a liquid hydrocarbon fuel oil | — | 1985-12-24 |
| 4498909 | Process for the gasification of fuels | Geoffrey Milner, Michael Butler | 1985-02-12 |
| 4477425 | Production of anhydrous hydrogen fluoride from low-grade metallic fluorides and sulfuric acid | William W. Berry, Ned B. Spake | 1984-10-16 |
| 4423702 | Method for desulfurization, denitrifaction, and oxidation of carbonaceous fuels | Antonio A. Padilla, Larry A. Rodriguez, Ned B. Spake, Warnie L. Sage | 1984-01-03 |
| 4405332 | Alternative fuel comprised of sewage sludge and a particulate solid fuel | Larry A. Rodriguez, Antonio A. Padilla, Ned B. Spake | 1983-09-20 |
| 4395975 | Method for desulfurization and oxidation of carbonaceous fuels | Antonio A. Padilla, Larry A. Rodriguez, Ned B. Spake | 1983-08-02 |