Frank J. Chen
37Patents
21h-index
30Co-inventors
81Inventor score
Filing activity: Sep 20, 1984 → Jul 23, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5444135A | Direct synthesis by living cationic polymerization of nitrogen-containing polymers | Chemistry; Metallurgy | 87 | Expired |
| US4849572A | Process for preparing polybutenes having enhanced reactivity using boron trifluoride catalysts (PT-647) | Mechanical Engineering; Lighting; Heating | 67 | Expired |
| US4952739A | Organo-Al-chloride catalyzed poly-n-butenes process | Chemistry; Metallurgy | 54 | Expired |
| US5663470A | """Heterogeneous lewis acid-type catalysts""" | Chemistry; Metallurgy | 49 | Expired |
| US6022929A | Amorphous olefin polymers, copolymers, methods of preparation and derivatives thereof | Chemistry; Metallurgy | 47 | Expired |
| US5563313A | Immobilized Lewis Acid catalysts | Chemistry; Metallurgy | 44 | Expired |
| US5789335A | Supported Lewis acid catalysts for hydrocarbon conversion reactions | Performing Operations; Transporting | 41 | Expired |
| US5607890A | Supported Lewis acid catalysts derived from superacids useful for hydrocarbon conversion reactions | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5814715A | Amorphous olefin polymers, copolymers, methods of preparation and derivatives thereof | Chemistry; Metallurgy | 38 | Expired |
| US5561095A | Supported lewis acid catalysts for hydrocarbon conversion reactions | Chemistry; Metallurgy | 37 | Expired |
| US5629394A | Direct synthesis by living cationic polymerization of nitrogen-containing polymers | Chemistry; Metallurgy | 36 | Expired |
| US5288677A | Immobilized Lewis acid catalysts | Chemistry; Metallurgy | 32 | Expired |
| US5648580A | Supported lewis acid catalysts for hydrocarbon conversion reactions | Chemistry; Metallurgy | 30 | Expired |
| US5571885A | Immobilized lewis acid catalysts | Chemistry; Metallurgy | 30 | Expired |
| US5032653A | Direct synthesis by cationic polymerization of nitrogen-containing polymers | Chemistry; Metallurgy | 30 | Expired |
| US4558170A | Polyisobutylene process | Chemistry; Metallurgy | 29 | Expired |
| US4686054A | Succinimide lubricating oil dispersant | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US6060633A | Supported Lewis acid catalysts derived from superacids useful for hydrocarbon conversion reactions | Chemistry; Metallurgy | 27 | Expired |
| US5780563A | Supported lewis acid catalysts derived from superacids useful for hydrocarbon conversion reactions | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5902919A | Supported Lewis acid catalyst polymerization process | Performing Operations; Transporting | 23 | Expired |
| US5336745A | Terminally-substituted polymeric compositions from cationically polymerizable monomers and initiators | Chemistry; Metallurgy | 23 | Expired |
| US5414177A | Immobilized Lewis acid catalysts | Chemistry; Metallurgy | 9 | Expired |
| US5118875A | Method of preparing alkyl phenol-formaldehyde condensates | Chemistry; Metallurgy | 9 | Expired |
| US4982045A | Fixed bed process for polymerizing liquid butenes | Chemistry; Metallurgy | 8 | Expired |
| US5409873A | Immobilized Lewis acid catalysts | Chemistry; Metallurgy | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.