Josef Pfeifer
75Patents
15h-index
46Co-inventors
80Inventor score
Filing activity: Aug 21, 1972 → Jun 20, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4629777A | Polyimides, a process for their preparation and their use | Emerging Cross-Sectional Technologies | 90 | Expired |
| US4694061A | Radiation-sensitive polycondensates, processes for their preparation coated material and its use | Emerging Cross-Sectional Technologies | 56 | Expired |
| US4090206A | Method and apparatus for producing successive lines of image points on a recording medium | Electricity | 50 | Expired |
| US3966316A | Electrostatic copying machine with removable copying drum | Physics | 46 | Expired |
| US4657832A | Photosensitive polymers as coating materials | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5009812A | Antistatic and electrically conducting polymers and moulding materials | Electricity | 34 | Expired |
| US4096486A | Recorder | Electricity | 32 | Expired |
| US4189560A | Crosslinkable polymers of unsaturated imides | Chemistry; Metallurgy | 31 | Expired |
| US4698295A | Polyimides, a process for their preparation and their use, and tetracarboxylic acids and tetracarboxylic acid derivatives | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4187364A | Crosslinkable polymers of unsaturated imides | Chemistry; Metallurgy | 24 | Expired |
| US4656116A | Radiation-sensitive coating composition | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4107687A | Recording device | Electricity | 21 | Expired |
| US4617151A | 2- or 2,3-substituted 5,6,11,12-tetrathiotetracene and 5,6,11,12-tetraselenotetracene | Physics | 19 | Expired |
| US4438164A | Containers for X-ray films or the like | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4914182A | Polyimides, a process for their preparation and their use, and tetracarboxylic acids and tetracarboxylic acid derivatives | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4629685A | Process for irradiating polyimides | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4087178A | Sheet-holding cassette for copying machine | Performing Operations; Transporting | 14 | Expired |
| US4925912A | Auto-photocrosslinkable copolyimides and polyimide compositions | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4680195A | Homopolymers, copolymers and coated material and its use | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5153321A | Antistatic and electrically conducting polymers and moulding materials | Electricity | 13 | Expired |
| US3988756A | Apparatus for processing webs of photographic material | Physics | 12 | Expired |
| US3966194A | Apparatus for manipulating finished reproductions in copying machines | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4785074A | Radiation-sensitive polycondensates, processes for their preparation, coated material and its use | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4783372A | Homopolymers, copolymers and coated material and its use | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4173411A | Exposure system for copying machines | Physics | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.