Koju Okazaki
42Patents
15h-index
39Co-inventors
81Inventor score
Filing activity: Apr 6, 1988 → Mar 7, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5753730A | Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur-containing urethane resin lens and lens prepared thereby | Physics | 69 | Expired |
| US5693738A | Composition for urethane-base plastic lens, urethane-base plastic lens obtained from the composition, and process for the production of the plastic lens | Physics | 66 | Expired |
| US4946923A | S-alkyl thiocarbamate base resin, plastic lens comprising the resin, and process for making the lens | Physics | 47 | Expired |
| US6100362A | Sulfur-containing urethane-based resin and composition and process for producing the resin | Physics | 41 | Expired |
| US4929707A | Polyurethane base lens resin, plastic lens comprising the resin and preparation method of the lens | Performing Operations; Transporting | 35 | Expired |
| US5608115A | Polythiol useful for preparing sulfur-containing urethane-based resin and process for producing the same | Physics | 33 | Expired |
| US5594088A | Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur containing urethane resin lens and lens prepared thereby | Physics | 26 | Expired |
| US6300464A | Polymerizable composition | Physics | 24 | Expired |
| US5837797A | Process for preparing a sulfur-containing urethane-based plastic lens and the lens prepared thereby | Physics | 20 | Expired |
| US5084545A | Resin having a large refractive index, lenses comprising the resin and process for preparing the lens | Chemistry; Metallurgy | 18 | Expired |
| US5013496A | Process for molding a highly-refractive plastic lens | Chemistry; Metallurgy | 17 | Expired |
| US5955206A | Polysulfide-based resin composition, polysulfide-based resin, and optical material comprising the resin | Physics | 16 | Expired |
| US5021503A | Resin for plastic lens having high-refractive index, lens comprising the resin, and method for preparation of the lens | Chemistry; Metallurgy | 16 | Expired |
| US5126388A | Highly-refractive plastic lens and process for making the lens | Chemistry; Metallurgy | 15 | Expired |
| US5523467A | Process for the preparation of aliphatic polyisocyanates | Chemistry; Metallurgy | 15 | Expired |
| US6204311A | Polymerizable composition | Physics | 11 | Expired |
| US5194559A | Optical urethane resins and plastic lenses comprising the same | Physics | 9 | Expired |
| US5302749A | Stabilizing method of isocyanate compounds and isocyanate compositions stabilized thereby | Chemistry; Metallurgy | 8 | Expired |
| US6458917B2 | Polymerizable composition | Physics | 5 | Expired |
| US4873374A | Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor | Chemistry; Metallurgy | 3 | Expired |
| US6797805B2 | Organic polymers and novel polymerizable compounds | Chemistry; Metallurgy | 3 | Expired |
| US6124424A | Selenized transparent optical material | Physics | 3 | Expired |
| US4877907A | Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor | Chemistry; Metallurgy | 3 | Expired |
| US6365707B1 | Polymerizable composition and process for producing optical resin comprising the same | Physics | 2 | Expired |
| US9034464B2 | Single layer film and hydrophilic material comprising the same | Chemistry; Metallurgy | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.