Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6692565 | Colored cement | Charles J. Johansen, Jr. | 2004-02-17 |
| 6180128 | Non-carcinogenic substitute for play sand | Charles J. Johansen, Jr. | 2001-01-30 |
| 5951752 | Method of using a coloring composition in a concrete based composition | Charles J. Johansen, Jr., Robert L. Vecchio, Hani Zoumut | 1999-09-14 |
| 5855665 | System and method for producing a pigmented cement composition | Charles J. Johansen, Jr., Robert L. Vecchio, Hani Zoumut | 1999-01-05 |
| 5849218 | Fluorescent pool coating | Charles J. Johansen, Jr. | 1998-12-15 |
| 5846315 | Method for preparing a pigmented dispersing pigment cement composition | Charles J. Johansen, Jr., Robert L. Vecchio, Hani Zoumut | 1998-12-08 |
| 5558708 | System and method for dispersing pigment in cement based compositions | Charles J. Johansen, Jr., Robert L. Vecchio, Hani Zoumut | 1996-09-24 |
| 5362322 | Color epoxy grout system and method for use | Charles J. Johansen, Jr., Robert L. Vecchio | 1994-11-08 |