DP

Donald L. Purvis

BS Bj Services: 2 patents #74 of 250Top 30%
📍 Parker, CO: #267 of 630 inventorsTop 45%
🗺 Colorado: #17,029 of 40,980 inventorsTop 45%
Overall (All Time): #2,156,765 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7207386 Method of hydraulic fracturing to reduce unwanted water production Harold Dean Brannon, William Dale Wood, Allan R. Rickards, Christopher John Stephenson 2007-04-24
6367548 Diversion treatment method David Cramer, David D. Smith, Douglas L. Walton 2002-04-09