Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889747 | Hydrophobic expanded perlite compositions and process for preparing the same | — | 1989-12-26 |
| 4877654 | Buffered silane emulsions for rendering porous substrates water repellent | — | 1989-10-31 |
| 4814407 | Composition for waterproofing silica-ceramic insulation bodies | Levy A. Canova, Ralph J. DePasquale | 1989-03-21 |
| 4802442 | Cat litter screening device | — | 1989-02-07 |