Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6632527 | Composite proppant, composite filtration media and methods for making and using same | Robert Ray McDaniel | 2003-10-14 |
| 6582819 | Low density composite proppant, filtration media, gravel packing media, and sports field media, and methods for making and using same | Robert Ray McDaniel | 2003-06-24 |
| 6406789 | Composite proppant, composite filtration media and methods for making and using same | Robert Ray McDaniel | 2002-06-18 |
| 6015846 | Method of improving the properties of reclaimed sand used for the production of foundry moulds and cores | Philippe Toussaint, Patrick Robert Queval, Jacques Andre Caumont | 2000-01-18 |