ClearWater Holdings Ltd.
41Patents
16Active
41Granted
43Portfolio score
Filing activity: Feb 13, 1992 → Oct 27, 2021 · 6 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5807812A | Controlled gel breaker | Emerging Cross-Sectional Technologies | 106 | Expired |
| US6054417A | Rapid gel formation in hydrocarbon recovery | Emerging Cross-Sectional Technologies | 94 | Expired |
| US5693837A | Ferric alkyl amine citrates and methods of making them | Emerging Cross-Sectional Technologies | 88 | Expired |
| US5417287A | Hydrocarbon gels useful in formation fracturing | Emerging Cross-Sectional Technologies | 49 | Expired |
| US5607902A | Method of treating shale and clay in hydrocarbon formation drilling | Chemistry; Metallurgy | 47 | Expired |
| US5846915A | Delayed breaking of gelled hydrocarbon fracturing fluid | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5385206A | Iterated foam process and composition for well treatment | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5614010A | Hydrocarbon gels useful in formation fracturing | Chemistry; Metallurgy | 34 | Expired |
| US5591701A | Iterated foam process and composition for well treatment | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5647900A | Preparation of hydrocarbon gels from ferric sources, polycarboxylic acid compounds, and optional amines, in combination with phosphate esters | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5571315A | Hydrocarbon gels useful in formation fracturing | Emerging Cross-Sectional Technologies | 28 | Expired |
| US8159104B1 | DC induction electric motor-generator with magnetic gap self commutating laminated ferromagnetic rotating core | Electricity | 27 | Active |
| US8232695B2 | Electromagnetic machine with independent removable coils, modular parts and self sustained passive magnetic bearing | Electricity | 24 | Active |
| US6004908A | Rapid gel formation in hydrocarbon recovery | Emerging Cross-Sectional Technologies | 18 | Expired |
| US7834503B2 | Immersed windings, monopole field, electromagnetic rotating machine | Electricity | 18 | Active |
| US7732973B2 | Electromagnetic machine with magnetic gap channels | Electricity | 17 | Active |
| US7791242B2 | DC induction electric motor-generator | Electricity | 17 | Active |
| USRE46449E1 | Electromagnetic machine with independent removable coils, modular parts and self sustained passive magnetic bearing | General | 16 | Active |
| US5854180A | Environmentally improved acid corrosion inhibitor | Chemistry; Metallurgy | 15 | Expired |
| US6158147A | Method and apparatus for drying of grain and other particulates using a membrane | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5211239A | Method of maintaining subterranean formation permeability and inhibiting clay swelling | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6454005B1 | Treating shale and clay in hydrocarbon producing formations with combinations of guar and potassium formate | Chemistry; Metallurgy | 6 | Expired |
| US6368384B1 | Desiccant tablets for gas drying | Performing Operations; Transporting | 6 | Expired |
| US5733841A | Eutectic drying composition and method | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6502637B2 | Treating shale and clay in hydrocarbon producing formations | Chemistry; Metallurgy | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.