Her Majesty the Queen in right of Canada, as represented by the Minister of Energy, Mines and Resources Canada
52Patents
0Active
52Granted
39Portfolio score
Filing activity: Dec 2, 1976 → Dec 27, 1994
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5322617A | Upgrading oil emulsions with carbon monoxide or synthesis gas | Chemistry; Metallurgy | 48 | Expired |
| US4370221A | Catalytic hydrocracking of heavy oils | Chemistry; Metallurgy | 46 | Expired |
| US5096566A | Process for reducing the viscosity of heavy hydrocarbon oils | Chemistry; Metallurgy | 43 | Expired |
| US4176051A | Process for catalytically hydrocracking a heavy hydrocarbon oil | Chemistry; Metallurgy | 24 | Expired |
| US4116809A | Deaerator circuit for bitumen froth | Chemistry; Metallurgy | 23 | Expired |
| US4561062A | Stress measurement by X-ray diffractometry | Physics | 22 | Expired |
| US4376695A | Simultaneous demetalization and hydrocracking of heavy hydrocarbon oils | Chemistry; Metallurgy | 21 | Expired |
| US4150093A | Method for concentrating heavy minerals in the solids tailings from hot water extraction of tar sands | Chemistry; Metallurgy | 20 | Expired |
| US4098691A | Purification of water for boiler | Performing Operations; Transporting | 19 | Expired |
| US4606649A | Assembly for concurrent thermogravimetry and differential thermal analysis | Physics | 16 | Expired |
| US5008234A | Process for the preparation of catalytic metal clusters | Performing Operations; Transporting | 16 | Expired |
| US4072609A | Capacitance system for heavy phase discharge of second stage centrifugal separation circuit | Chemistry; Metallurgy | 16 | Expired |
| US5256374A | Sample introduction for spectrometers | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5234494A | Softening agents for recycling asphalt pavement | Chemistry; Metallurgy | 13 | Expired |
| US5104516A | Upgrading oil emulsions with carbon monoxide or synthesis gas | Chemistry; Metallurgy | 11 | Expired |
| US5152175A | Bubble measurement cell | Physics | 10 | Expired |
| US5078212A | Emplacement of filter packs and seals for groundwater monitoring | Fixed Constructions | 10 | Expired |
| US5304233A | Recovery of platinum group metals (PGM) from acidic solutions by reduction precipitation with sodium borohydride | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5286451A | Apparatus for controlled delivery of particulate material | Physics | 10 | Expired |
| US5204070A | Reactor for processing a catalyst material | Performing Operations; Transporting | 9 | Expired |
| US4558031A | High porosity catalyst | Chemistry; Metallurgy | 9 | Expired |
| US5223023A | Recovery of gold from solution by reduction-precipitation with stabilized alkali metal borohydride | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5232286A | Long lasting thermocouple for high temperature measurements of liquid metals, mattes and slags | Electricity | 8 | Expired |
| US5427607A | Process for the recovery of metallic iron from slags and other residues | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4519915A | Clarification of black water produced during recovery of bitumens and heavy oils | Emerging Cross-Sectional Technologies | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.