Ciphergen Biosystems, Inc.
35Patents
1Active
35Granted
38Portfolio score
Filing activity: Jun 7, 1995 → Jun 17, 2005 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6225047A | Use of retentate chromatography to generate difference maps | Emerging Cross-Sectional Technologies | 223 | Expired |
| US6675104B2 | Method for analyzing mass spectra | Physics | 171 | Expired |
| US7046357B2 | Apparatus for microfluidic processing and reading of biochip arrays | Emerging Cross-Sectional Technologies | 152 | Expired |
| US6579719B1 | Retentate chromatography and protein chip arrays with applications in biology and medicine | Emerging Cross-Sectional Technologies | 61 | Expired |
| US5792664A | Methods for producing and analyzing biopolymer ladders | Emerging Cross-Sectional Technologies | 57 | Expired |
| US6844165B2 | Retentate chromatography and protein chip arrays with applications in biology and medicine | Emerging Cross-Sectional Technologies | 44 | Expired |
| US6294790A | Secondary ion generator detector for time-of-flight mass spectrometry | Electricity | 44 | Expired |
| US6613234B2 | Large pore volume composite mineral oxide beads, their preparation and their applications for adsorption and chromatography | Performing Operations; Transporting | 39 | Expired |
| US6841936B2 | Fast recovery electron multiplier | Electricity | 37 | Expired |
| US7045366B2 | Photocrosslinked hydrogel blend surface coatings | Chemistry; Metallurgy | 36 | Expired |
| US6897072B1 | Probes for a gas phase ion spectrometer | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6818411B2 | Retentate chromatography and protein chip arrays with applications in biology and medicine | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6464942B2 | Plate alignment and sample transfer indicia for a multiwell multiplate stack and method for processing biological/chemical samples using the same | Emerging Cross-Sectional Technologies | 23 | Expired |
| US7112453B2 | Retentate chromatography and protein chip arrays with applications in biology and medicine | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6881586B2 | Retentate chromatography and protein chip arrays with applications in biology and medicine | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6811969B1 | Retentate chromatography—profiling with biospecific interaction adsorbents | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6555813B1 | Probes with hydrophobic coatings for gas phase ion spectrometers | Emerging Cross-Sectional Technologies | 20 | Expired |
| US7160734B2 | Retentate chromatography and protein chip arrays with applications in biology | Emerging Cross-Sectional Technologies | 19 | Expired |
| US6586728B1 | Variable width digital filter for time-of-flight mass spectrometry | Electricity | 15 | Expired |
| US6580071B2 | Method for calibrating a mass spectrometer | Electricity | 13 | Expired |
| US7105339B2 | Retentate chromatography and protein chip arrays with applications in biology and medicine | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6867414B2 | Electric sector time-of-flight mass spectrometer with adjustable ion optical elements | Electricity | 12 | Expired |
| US7027933B2 | Method for analyzing mass spectra | Physics | 11 | Expired |
| US7129483B2 | Laser desorption and ionization mass spectrometer with quantitative reproducibility | Electricity | 10 | Expired |
| US6909981B2 | Data management system and method for processing signals from sample spots | Physics | 9 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.