Nippon Zeon Co., Ltd.
611Patents
0Active
611Granted
45Portfolio score
Filing activity: Oct 1, 1973 → Oct 25, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5192301A | Closing plug of a defect for medical use and a closing plug device utilizing it | Human Necessities | 1,378 | Expired |
| US5298015A | Wound dressing having a porous structure | Emerging Cross-Sectional Technologies | 1,100 | Expired |
| US4969890A | Catheter | Human Necessities | 746 | Expired |
| US4329383A | Non-thrombogenic material comprising substrate which has been reacted with heparin | Emerging Cross-Sectional Technologies | 255 | Expired |
| US5449342A | Apparatus for assisting blood circulation | Human Necessities | 215 | Expired |
| US4997425A | Wound dressing | Human Necessities | 183 | Expired |
| US5413599A | Medical valve apparatus | Emerging Cross-Sectional Technologies | 167 | Expired |
| US4616069A | Process for making diene polymer rubbers | Chemistry; Metallurgy | 105 | Expired |
| US5274006A | Foamable epoxy resin composition | Chemistry; Metallurgy | 94 | Expired |
| US5844050A | Modified conjugated diene polymer, process for producing same and composition comprising same | Chemistry; Metallurgy | 90 | Expired |
| US5075377A | Block copolymer composition | Chemistry; Metallurgy | 82 | Expired |
| US4550142A | Rubber composition | Chemistry; Metallurgy | 79 | Expired |
| US4647625A | Process for modifying conjugated diene polymers | Chemistry; Metallurgy | 78 | Expired |
| US4105731A | Method of embedding an end of a bundle of thread-like bodies in a molding material and controlling capillary action by said material | Emerging Cross-Sectional Technologies | 74 | Expired |
| US4049765A | Method for setting end portion of bundle of thread-like bodies | Emerging Cross-Sectional Technologies | 72 | Expired |
| US5462995A | Hydrogenated products of thermoplastic norbornene polymers, their production, substrates for optical elements obtained by molding them, optical elements and lenses | Emerging Cross-Sectional Technologies | 69 | Expired |
| US4677153A | Method for modifying rubbers | Chemistry; Metallurgy | 67 | Expired |
| US6633722B1 | Light guide plate with alicyclic resin | Physics | 62 | Expired |
| US5290857A | Epoxy resin adhesive composition | Emerging Cross-Sectional Technologies | 62 | Expired |
| US4676404A | Method and apparatus for feeding drug liquid from hermetic returnable can | Emerging Cross-Sectional Technologies | 61 | Expired |
| US4337329A | Process for hydrogenation of conjugated diene polymers | Chemistry; Metallurgy | 57 | Expired |
| US4614771A | Process for making diene copolymer rubbers | Chemistry; Metallurgy | 55 | Expired |
| US4452951A | Process for hydrogenating conjugated diene polymers | Chemistry; Metallurgy | 52 | Expired |
| US6656153B1 | Balloon catheter | Human Necessities | 52 | Expired |
| US6403289B1 | Developer for photosensitive polyimide resin composition | Physics | 51 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.