Spectrum Sciences B.V.
48Patents
0Active
48Granted
36Portfolio score
Filing activity: Nov 19, 1987 → Jun 8, 1993
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5028964A | Imaging system with rigidizer and intermediate transfer member | Physics | 55 | Expired |
| US5089856A | Image transfer apparatus incorporating an internal heater | Physics | 54 | Expired |
| US4974027A | Imaging system with compactor and squeegee | Physics | 53 | Expired |
| US5047808A | Image transfer apparatus including a compliant transfer member | Physics | 46 | Expired |
| US5346796A | Electrically stabilized liquid toners | Emerging Cross-Sectional Technologies | 46 | Expired |
| US5276492A | Imaging method and apparatus | Physics | 44 | Expired |
| US4984025A | Imaging system with intermediate transfer member | Physics | 36 | Expired |
| US5335054A | Image transfer apparatus including intermediate transfer blanket | Physics | 35 | Expired |
| US5289238A | Liquid toner developing apparatus having metal blade with insulating coating in contact with developing roller | Physics | 33 | Expired |
| US5300390A | Liquid toner composition | Physics | 32 | Expired |
| US5192638A | Toner for use in compositions for developing latent electrostatic images, method of making the same, and liquid composition using the improved toner | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5208637A | Liquid toner replenishment system | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5117263A | Liquid toner developer | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5266435A | Liquid toners containing charge directors and components for stabilizing their electrical properties | Physics | 27 | Expired |
| US5225306A | Charge priming agents for liquid toners | Physics | 25 | Expired |
| US4985732A | Electrostatic separator | Physics | 25 | Expired |
| US5255058A | Liquid developer imaging system using a spaced developing roller and a toner background removal surface | Physics | 24 | Expired |
| US4999677A | Imaging system with rigidizer | Physics | 23 | Expired |
| US5280326A | Imaging system | Physics | 21 | Expired |
| US5148222A | Liquid developer system | Physics | 20 | Expired |
| US5078504A | Dispersion apparatus | Performing Operations; Transporting | 20 | Expired |
| US5231454A | Charge director replenishment system and method for a liquid toner developing apparatus | Physics | 19 | Expired |
| US5166734A | Imaging system including pre-transfer discharge | Physics | 19 | Expired |
| US5034778A | Background cleaning system for liquid developer imaging apparatus | Physics | 17 | Expired |
| US5047306A | Humidity tolerant charge director compositions | Physics | 17 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.