Walter Puschel
16Patents
5h-index
14Co-inventors
55Inventor score
Filing activity: May 30, 1975 → Apr 23, 1981
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4198235A | Dye diffusion transfer process employing compounds that release sulfonamide dye providing radicals | Physics | 9 | Expired |
| US4139387A | Process for the production of direct-positive photographic images | Physics | 8 | Expired |
| US4195992A | Photographic dye diffusion transfer process | Physics | 6 | Expired |
| US4110113A | Sulfonamido dye releaser in photographic dye diffusion transfer | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4156608A | Color photographic material with improved color reproduction | Physics | 5 | Expired |
| US4088491A | Light sensitive photographic material | Physics | 5 | Expired |
| US4139383A | Dye diffusion transfer employing pyridine azo dye | Chemistry; Metallurgy | 5 | Expired |
| US4046574A | Color photographic material with homophthalimide thioether development inhibitor | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4250252A | Light-sensitive color photographic material | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4186012A | Light sensitive color photographic material containing development inhibitor releasing coupler | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4242435A | Photographic dye diffusion transfer process | Physics | 3 | Expired |
| US4322492A | Process for the development of color photographic images with p-dialkylaminoaniline color developers | Physics | 3 | Expired |
| US4171223A | Light-sensitive color photographic material | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4171220A | Photographic dye diffusion transfer process | Physics | 2 | Expired |
| US4301243A | Photographic recording material | Physics | 1 | Expired |
| US4000156A | Preparation of 4-methyl-2-pyrazolin-5-ones | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.