Sadao Ishige
26Patents
7h-index
42Co-inventors
69Inventor score
Filing activity: Oct 16, 1973 → Dec 2, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5180652A | Light- and heat-sensitive composition, and recording material | Emerging Cross-Sectional Technologies | 65 | Expired |
| US3934070A | Recording sheet and color developer therefor | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4401717A | Heat-sensitive recording material | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4598036A | Print-out compositions | Physics | 19 | Expired |
| US4771032A | Heat-sensitive recording material and recording method therefor | Physics | 14 | Expired |
| US4842979A | Black color heat-sensitive diazo microcapsule recording material with benzoylacetic amide coupler | Physics | 8 | Expired |
| US4132436A | Recording material | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4433156A | Process for preparing fluoran derivatives | Performing Operations; Transporting | 7 | Expired |
| US4070508A | Recording method comprising reacting cellulose fiber with a basic color former | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4076887A | Recording sheets | Performing Operations; Transporting | 7 | Expired |
| US3930672A | Pressure-sensitive copying paper containing lactone compounds derived from pyridine-carboxylic acid | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4535348A | Fluoran derivatives and recording material using same | Chemistry; Metallurgy | 6 | Expired |
| US5213939A | Light- and heat-sensitive recording material | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4471074A | Heat-sensitive recording materials | Performing Operations; Transporting | 4 | Expired |
| US5492789A | Process for producing microcapsules containing a diazonium salt compound and a photofixation thermal recording material employing the same | Physics | 4 | Expired |
| US5683850A | Diazo heat-sensitive recording material comprising hydroxy coumarin as a coupler | Physics | 3 | Expired |
| US5547806A | Process for producing microcapsule containing diazonium salt compound and photo- and heat-sensitive recording material produced using the same | Physics | 3 | Expired |
| US5370965A | Positive-working light-sensitive composition containing diazonium salt and novolak resin | Physics | 3 | Expired |
| US4975353A | Heat-sensitive recording materials | Physics | 2 | Expired |
| US5212042A | Positive type light-sensitive composition | Chemistry; Metallurgy | 2 | Expired |
| US5250384A | Light-sensitive heat-sensitive composition and recording material comprising same and image formation process using same | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4220356A | Recording materials containing chromenoindoles | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5338642A | Diazo type recording material comprising two couplers wherein the novel coupler used is a bis-malonamide | Physics | 1 | Expired |
| US4119777A | Thiazine production | Chemistry; Metallurgy | 1 | Expired |
| US5543260A | Diazo heat-sensitive recording material | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.