Shigetoshi Kuma
23Patents
3h-index
26Co-inventors
63Inventor score
Filing activity: Mar 27, 2001 → Apr 24, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6770735B2 | Process for preparing a thiol compound | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6596841B2 | Polythiol, polymerizable composition, resin and lens, and process for preparing thiol compound | Emerging Cross-Sectional Technologies | 11 | Expired |
| US8044165B2 | Process for producing resin for optical material | Chemistry; Metallurgy | 7 | Active |
| US9227925B2 | Process for producing aldehyde compounds | Chemistry; Metallurgy | 3 | Active |
| US7244808B2 | Thiourethane-based optical material | Physics | 2 | Expired |
| US6770734B2 | Polythiol compound | Emerging Cross-Sectional Technologies | 1 | Expired |
| US9487475B2 | Preparation method of aldehyde compound with limited amount of acrylonitrile | Chemistry; Metallurgy | 1 | Active |
| US7396900B2 | Thiourethane-based optical material | Physics | 1 | Active |
| US10399930B2 | Purification method of aldehyde compound | Chemistry; Metallurgy | 0 | Active |
| US10696627B2 | Process for producing pentaerythritol mercaptocarboxylic acid ester, polymerizable composition, resin, optical material, and lens | Physics | 0 | Active |
| US10844010B2 | Process for producing (poly)sulfide compound and process for producing episulfide compound | Physics | 0 | Active |
| US10196501B2 | Polymerizable composition for optical material, optical material produced from same, and process for producing same | Physics | 0 | Active |
| US11840599B2 | Thiol-containing composition for optical material and polymerizable composition for optical material | Physics | 0 | Active |
| US9809533B2 | Purification method of aldehyde compound | Chemistry; Metallurgy | 0 | Active |
| US9475760B2 | Preparation method of aldehyde compound using a metal compound and a phosphorus compound | Chemistry; Metallurgy | 0 | Active |
| US9678246B2 | Polymerizable composition for optical material | Performing Operations; Transporting | 0 | Active |
| US9464154B2 | Process for producing polyurethane resin | Chemistry; Metallurgy | 0 | Active |
| US10774038B2 | Process for producing cyanonorbornene | Chemistry; Metallurgy | 0 | Active |
| US10131767B2 | Polymerizable composition for optical material, optical material obtained from polymerizable composition, and manufacturing method of optical material | Chemistry; Metallurgy | 0 | Active |
| US10640605B2 | Xylylenediisocyanate composition, xylylenediisocyanate-modified composition, two-component resin material, and resin | Physics | 0 | Active |
| US10399929B2 | Purification method of aldehyde compound | Chemistry; Metallurgy | 0 | Active |
| US8772441B2 | Polyurethanes polymerizable composition and method for producing optical resin of the same | Physics | 0 | Active |
| US11254783B2 | Xylylenediisocyanate composition, xylylenediisocyanate-modified composition, two-component resin material, and resin | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.