DD

David K. Douden

3M: 5 patents #2,937 of 11,543Top 30%
Overall (All Time): #1,059,939 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5104632 Method of making thin silica flakes Thomas J. Scanlan 1992-04-14
4985380 Method of making thin refractory flakes 1991-01-15
4971697 Thin silica flakes and method of making Thomas J. Scanlan 1990-11-20
4769189 Process for making hollow, ceramic spheroids 1988-09-06
4657810 Fired hollow ceramic spheroids 1987-04-14