HOKKAIDO ELECTRIC POWER CO., INC.
22Patents
6Active
22Granted
37Portfolio score
Filing activity: Mar 12, 1986 → Apr 24, 2019 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4629721A | Process for preparing desulfurizing and denitrating agents | Performing Operations; Transporting | 54 | Expired |
| US5453306A | Process for depositing oxide film on metallic substrate by heat plasma flash evaporation method | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5679625A | Method of making an oxide superconducting thin film | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5998050A | Composite metal oxide material | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5560894A | Process for treatment of exhaust gas | Performing Operations; Transporting | 6 | Expired |
| US4883185A | Suspension type transporter for a bolt drawing machine and positioning controller therefor | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7871586B2 | Mercury removal system and method | Emerging Cross-Sectional Technologies | 4 | Active |
| US8997665B2 | Slag-melting burner apparatus | Emerging Cross-Sectional Technologies | 3 | Active |
| US5106821A | Process for forming thin oxide film | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5747427A | Process for forming a semiconductive thin film containing a junction | Electricity | 3 | Expired |
| US5627142A | Method of producing composite metal oxide material | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7780143B2 | Gate valve | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US6512109B1 | Processes for producing saccharide derivatives using solid ultrastrong acid | Chemistry; Metallurgy | 2 | Expired |
| US5037796A | Process for producing hydrated and cured product of lime-gypsum-coal ash mixture | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5731271A | Method for preparing an oxide superconducting tape | Emerging Cross-Sectional Technologies | 1 | Expired |
| US9239164B2 | Slag monitoring device for coal gasifier and coal gasifier | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US6228336A | Dust collecting method | Performing Operations; Transporting | 0 | Expired |
| US12127566B2 | Method for suppressing greening | Human Necessities | 0 | Active |
| US5225393A | Process for forming thin oxide film | Emerging Cross-Sectional Technologies | 0 | Expired |
| US6602982B1 | Process for the preparation of regular glycopeptides | Human Necessities | 0 | Expired |
| US5376309A | Boride materials for electronic elements and method of preparing the same | Electricity | 0 | Expired |
| US8637784B2 | Method for improving residual stress in tubular body | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.