Nippon Kokan Co., Ltd.
488Patents
0Active
488Granted
41Portfolio score
Filing activity: Jun 13, 1972 → Apr 9, 1997
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4799975A | Method for producing beta type titanium alloy materials having excellent strength and elongation | Chemistry; Metallurgy | 53 | Expired |
| US4623173A | Screw joint coupling for oil pipes | Mechanical Engineering; Lighting; Heating | 52 | Expired |
| US4378923A | Binding device for elongated pipes | Performing Operations; Transporting | 51 | Expired |
| US4984829A | Screw coupling joint | Fixed Constructions | 49 | Expired |
| US4411964A | Composite coating steel sheets having good corrosion resistance paintability and corrosion resistance after paint coating | Emerging Cross-Sectional Technologies | 43 | Expired |
| US4407899A | Surface treated steel sheets for paint coating | Emerging Cross-Sectional Technologies | 43 | Expired |
| US4377483A | Method of removing dissolved heavy metals from aqueous waste liquids | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4775600A | Highly corrosion-resistant surface-treated steel plate | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4377347A | Method for measuring temperature of molten metal received in vessel | Physics | 39 | Expired |
| US4772295A | Method for recovering hydrocarbon vapor | Chemistry; Metallurgy | 37 | Expired |
| US4659394A | Process for preparation of highly anticorrosive surface-treated steel plate | Emerging Cross-Sectional Technologies | 35 | Expired |
| US3987662A | Fluid leakage detection apparatus | Physics | 33 | Expired |
| US4258319A | Surface defect detecting apparatus for use with rotating circularly shaped metallic material | Physics | 33 | Expired |
| US3979041A | Clamping mechanism for line-up of pipes | Performing Operations; Transporting | 32 | Expired |
| US4490077A | Apparatus for continuously measuring flow rate of fine material flowing through transport pipe | Physics | 31 | Expired |
| US4543300A | Iron-zinc alloy electro-galvanized steel sheet having a plurality of iron-zinc alloy coatings | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4519878A | Method of Fe-Zn alloy electroplating | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4743276A | Method of separating carbon monoxide and carbon monoxide adsorbent used in this method | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4818148A | Frost damage proofed pile | Fixed Constructions | 28 | Expired |
| US4606641A | Apparatus for measuring film thickness | Physics | 27 | Expired |
| US4742298A | Apparatus for detecting surface flaw of pipeline by electromagnetic induction | Physics | 27 | Expired |
| US3997835A | Method and apparatus for measuring distance | Physics | 24 | Expired |
| US4646977A | Spray nozzle | Performing Operations; Transporting | 24 | Expired |
| US4033165A | Apparatus for controlling flatness of metal sheet during rolling | Performing Operations; Transporting | 24 | Expired |
| US5093204A | Vibration-damping composite sheet steel | Emerging Cross-Sectional Technologies | 24 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.