Tonen Corporation
143Patents
0Active
143Granted
41Portfolio score
Filing activity: Jul 27, 1989 → Aug 31, 2000
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5556671A | Artificial snow in an aggregate form of snow granules | Emerging Cross-Sectional Technologies | 250 | Expired |
| US5989892A | Microorganisms, demulsifiers and processes for breaking an emulsion | Chemistry; Metallurgy | 108 | Expired |
| US5185092A | Lubricating oil for refrigerator | Chemistry; Metallurgy | 75 | Expired |
| US5051183A | Microporous polyolefin membrane and method of producing same | Emerging Cross-Sectional Technologies | 74 | Expired |
| US5179923A | Fuel supply control method and ultrasonic atomizer | Mechanical Engineering; Lighting; Heating | 68 | Expired |
| US5223465A | Olefin polymerization catalyst | Chemistry; Metallurgy | 67 | Expired |
| US5436039A | Artificial snow in an aggregate form of snow granules | Emerging Cross-Sectional Technologies | 46 | Expired |
| US5130210A | Stabilized zirconia solid electrolyte and process for preparation thereof | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5922411A | Composition for forming ceramic material and process for producing ceramic material | Chemistry; Metallurgy | 42 | Expired |
| US5093155A | Process for sizing reinforcing fiber by applying sulfone compounds containing sulfonyl groups and sized reinforcing fibers obtained thereby | Emerging Cross-Sectional Technologies | 38 | Expired |
| US6207625A | Lubricant oil composition for diesel engines (LAW913) | Chemistry; Metallurgy | 35 | Expired |
| US5459114A | Method for producing ceramic products | Chemistry; Metallurgy | 34 | Expired |
| US5177578A | Polycrystalline silicon thin film and transistor using the same | Electricity | 33 | Expired |
| US6576584B1 | Method for producing hydrotreating catalyst | Performing Operations; Transporting | 31 | Expired |
| US5747623A | Method and composition for forming ceramics and article coated with the ceramics | Chemistry; Metallurgy | 29 | Expired |
| US4986248A | Fuel supply system for internal combustion engine using an ultrasonic atomizer | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US5382634A | Terminal-modifed polyolefins | Chemistry; Metallurgy | 28 | Expired |
| US6306289A | Catalyst for hydrogenation treatment and method for hydrogenation treatment of hydrocarbon oil | Performing Operations; Transporting | 27 | Expired |
| US5279879A | Hybrid prepreg containing carbon fibers and at least one other reinforcing fiber in specific positions within the prepreg | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5688748A | Lubricating oil composition for internal combustion engines | Chemistry; Metallurgy | 25 | Expired |
| US5198554A | 5-(2,4-Dioxotetrahydro-3-furanylmethyl)norbornane-2,3-dicarboxylic acid anhydride and process for production thereof | Chemistry; Metallurgy | 24 | Expired |
| US6147035A | Lubricating oil composition containing overbased metal salicylate, amine antioxidant, phenol antioxidant, polyalkenylsuccinimide and zinc dialkyldithiophosphate | Chemistry; Metallurgy | 23 | Expired |
| US5030744A | Polyborosilazane and process for producing same | Chemistry; Metallurgy | 23 | Expired |
| US5759572A | Liposome with oligosaccharide on surface | Human Necessities | 21 | Expired |
| US5635263A | Reinforcing fiber sheet and concrete structure using same | Emerging Cross-Sectional Technologies | 20 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.