Thomas W. Oldham
33Patents
20h-index
36Co-inventors
85Inventor score
Filing activity: Dec 29, 1987 → Oct 24, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7377341B2 | Thermally stable ultra-hard material compact construction | Performing Operations; Transporting | 196 | Expired |
| US5765095A | Polycrystalline diamond bit manufacturing | Performing Operations; Transporting | 130 | Expired |
| US6287360A | High-strength matrix body | Chemistry; Metallurgy | 128 | Expired |
| US7473287B2 | Thermally-stable polycrystalline diamond materials and compacts | Emerging Cross-Sectional Technologies | 118 | Expired |
| US6375706B2 | Composition for binder material particularly for drill bit bodies | Performing Operations; Transporting | 101 | Expired |
| US7754333B2 | Thermally stable diamond polycrystalline diamond constructions | Emerging Cross-Sectional Technologies | 91 | Active |
| US7044243B2 | High-strength/high-toughness alloy steel drill bit blank | Fixed Constructions | 76 | Expired |
| US4836307A | Hard facing for milled tooth rock bits | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5494122A | Composite nozzles for rock bits | Fixed Constructions | 65 | Expired |
| US8147572B2 | Thermally stable diamond polycrystalline diamond constructions | Emerging Cross-Sectional Technologies | 62 | Active |
| US7250069B2 | High-strength, high-toughness matrix bit bodies | Performing Operations; Transporting | 62 | Expired |
| US6772849B2 | Protective overlay coating for PDC drill bits | Performing Operations; Transporting | 61 | Expired |
| US7350599B2 | Impregnated diamond cutting structures | Emerging Cross-Sectional Technologies | 54 | Expired |
| US7661491B2 | High-strength, high-toughness matrix bit bodies | Performing Operations; Transporting | 43 | Active |
| US6461401B1 | Composition for binder material particularly for drill bit bodies | Performing Operations; Transporting | 42 | Expired |
| US4944774A | Hard facing for milled tooth rock bits | Fixed Constructions | 42 | Expired |
| US6394202B2 | Drill bit having diamond impregnated inserts primary cutting structure | Performing Operations; Transporting | 38 | Expired |
| US7828088B2 | Thermally stable ultra-hard material compact construction | Performing Operations; Transporting | 33 | Active |
| US6725953B2 | Drill bit having diamond impregnated inserts primary cutting structure | Performing Operations; Transporting | 26 | Expired |
| US7475743B2 | High-strength, high-toughness matrix bit bodies | Performing Operations; Transporting | 21 | Active |
| US8056650B2 | Thermally stable ultra-hard material compact construction | Performing Operations; Transporting | 16 | Active |
| US4869329A | Rock bit insert | Fixed Constructions | 13 | Expired |
| US7644786B2 | Diamond bit steel body cutter pocket protection | Fixed Constructions | 11 | Active |
| US7625521B2 | Bonding of cutters in drill bits | Performing Operations; Transporting | 8 | Expired |
| US7798256B2 | Fixed cutter drill bit for abrasive applications | Fixed Constructions | 8 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.