Roger J. Card
31Patents
23h-index
46Co-inventors
85Inventor score
Filing activity: Jul 30, 1980 → Feb 20, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5330005A | Control of particulate flowback in subterranean wells | Chemistry; Metallurgy | 379 | Expired |
| US5501275A | Control of particulate flowback in subterranean wells | Chemistry; Metallurgy | 371 | Expired |
| US5439055A | Control of particulate flowback in subterranean wells | Chemistry; Metallurgy | 358 | Expired |
| US5979557A | Methods for limiting the inflow of formation water and for stimulating subterranean formations | Emerging Cross-Sectional Technologies | 350 | Expired |
| US5964295A | Methods and compositions for testing subterranean formations | Emerging Cross-Sectional Technologies | 303 | Expired |
| US6172011A | Control of particulate flowback in subterranean wells | Chemistry; Metallurgy | 227 | Expired |
| US6435277B1 | Compositions containing aqueous viscosifying surfactants and methods for applying such compositions in subterranean formations | Emerging Cross-Sectional Technologies | 220 | Expired |
| US6306800A | Methods of fracturing subterranean formations | Emerging Cross-Sectional Technologies | 213 | Expired |
| US6242390A | Cleanup additive | Emerging Cross-Sectional Technologies | 165 | Expired |
| US5551514A | Sand control without requiring a gravel pack screen | Fixed Constructions | 108 | Expired |
| US4711669A | Method of manufacturing a bonded particulate article by reacting a hydrolyzed amylaceous product and a heterocyclic compound | Chemistry; Metallurgy | 107 | Expired |
| US5877127A | On-the-fly control of delayed borate-crosslinking of fracturing fluids | Emerging Cross-Sectional Technologies | 104 | Expired |
| US6637517B2 | Compositions containing aqueous viscosifying surfactants and methods for applying such compositions in subterranean formations | Emerging Cross-Sectional Technologies | 87 | Expired |
| USRE36466E | Sand control without requiring a gravel pack screen | General | 72 | Expired |
| US7669653B2 | System and method for maintaining zonal isolation in a wellbore | Fixed Constructions | 61 | Expired |
| US4814012A | Method of manufacturing a bonded particulate article by reacting a hydrolyzed amylaceous product and a heterocyclic compound | Textiles; Paper | 58 | Expired |
| US6412561B1 | Methods of fracturing subterranean formations | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4726099A | Method of making piezoelectric composites | Emerging Cross-Sectional Technologies | 46 | Expired |
| US6419019B1 | Method to remove particulate matter from a wellbore using translocating fibers and/or platelets | Fixed Constructions | 33 | Expired |
| US4933230A | Piezoelectric composites | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6350721B1 | Fluids and techniques for matrix acidizing | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4639356A | High technology ceramics with partially stabilized zirconia | Chemistry; Metallurgy | 27 | Expired |
| US6924253B2 | Scale removal | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6608005B2 | Wellbore fluids and their application | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5091255A | Molding granules, their manufacture and their use in the production of molded articles | Emerging Cross-Sectional Technologies | 15 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.