Yasuo Sakaguchi
61Patents
16h-index
75Co-inventors
87Inventor score
Filing activity: Mar 21, 1972 → Jan 22, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5302479A | Crystals of hydroxygallium phthalocyanine, method of preparing the crystals, photoconductive material comprising the crystals, and electrophotographic photoreceptor comprising the material | Chemistry; Metallurgy | 71 | Expired |
| US5298617A | Oxytitaniumphthalocyanine hydrate crystal and electrophotographic photoreceptor using said crystal | Physics | 49 | Expired |
| US6020426A | Charge-transporting copolymer, method of forming charge-transporting copolymer, electrophotographic photosensitive body, and electrophotographic device | Chemistry; Metallurgy | 49 | Expired |
| US5236688A | Method for activating infusibilized pitch beads | Emerging Cross-Sectional Technologies | 44 | Expired |
| US6062246A | Mass flow controller and operating method thereof | Emerging Cross-Sectional Technologies | 40 | Expired |
| US3933335A | Casting mold for metals | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5393629A | Electrophotographic photoreceptor | Physics | 36 | Expired |
| US5358813A | Crystals of chlorogallium phthalocyanine and method of preparing them | Chemistry; Metallurgy | 36 | Expired |
| US5378569A | Oxytitaniumphthalocyanine hydrate crystal and electrophotographic photoreceptor using said crystal | Physics | 26 | Expired |
| US4996125A | Electrophotographic photoreceptor containing a fluorine lubricating agent layer | Physics | 22 | Expired |
| US4713413A | Removal of organic halides from hydrocarbon solvents | Chemistry; Metallurgy | 22 | Expired |
| US5663327A | Hydroxygallium phthalocyanine crystal, process for producing the same, and electrophotographic photoreceptor containing the same | Physics | 22 | Expired |
| US5252417A | Titanyl phthalocyanine crystal and electrophotographic photoreceptor using the same | Chemistry; Metallurgy | 18 | Expired |
| US5338636A | Dichlorotin phthalocyanine crystal electrophotographic photoreceptor using the same, and coating composition for electrophotographic photoreceptor | Physics | 18 | Expired |
| US5283145A | Crystals of dichlorotin phthalocyanine, method of preparing the crystal, and electrophotographic photoreceptor comprising the crystal | Chemistry; Metallurgy | 18 | Expired |
| US5308728A | Dichlorotin phthalocyanine crystal, process for producing the same, and electrophotographic photoreceptor using the same | Physics | 17 | Expired |
| US5463043A | Process for producing a dichlorotin phthalocyanine crystal | Physics | 16 | Expired |
| US5416207A | Dichlorotin phthalocyanine crystal, process for producing the same, and electrophotographic photoreceptor using the same | Physics | 15 | Expired |
| US4781994A | Fiber-reinforced cement material and molded article comprising hardened product thereof | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5332643A | Method of wet honing a support for an electrophotographic photoreceptor | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5456998A | Photoconductive imaging members containing alkoxy-bridged metallophthalocyanine dimers | Physics | 13 | Expired |
| US5464717A | Electrophotographic photoreceptor with subbing layer and charge generating layer | Physics | 13 | Expired |
| US5834149A | Hydroxygallium phthalocyanine crystals and electrophotographic photoreceptors using same | Physics | 11 | Expired |
| US5834146A | Electrophotographic photoreceptor containing uniform and nonuniform charge transporting layers | Physics | 11 | Expired |
| US5110681A | Melt-stable poly(arylene thioether-ketone) prepregs and molded or formed products thereof | Emerging Cross-Sectional Technologies | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.