ASAHI KASEI KABUSHIKI KAISHA
957Patents
600Active
957Granted
56Portfolio score
Filing activity: May 21, 1979 → May 24, 2024 · 44 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6569309B2 | Fuel cell type reactor and method for producing a chemical compound by using the same | Emerging Cross-Sectional Technologies | 235 | Expired |
| US6495730B1 | Catalysts for hydrogenation of carboxylic acid | Chemistry; Metallurgy | 167 | Expired |
| US6287720A | Nonaqueous battery having porous separator and production method thereof | Emerging Cross-Sectional Technologies | 130 | Expired |
| US7605883B2 | Wire grid polarizer and liquid crystal display device using the polarizer | Physics | 101 | Active |
| US6322703A | Method for purifying aqueous suspension | Chemistry; Metallurgy | 79 | Expired |
| US6479374B1 | Method of manufacturing interconnection structural body | Electricity | 79 | Expired |
| US6337387B1 | Differentiation-suppressive polypeptide | Emerging Cross-Sectional Technologies | 76 | Expired |
| US7440891B1 | Speech processing method and apparatus for improving speech quality and speech recognition performance | Physics | 73 | Expired |
| US7160455B2 | Hollow fiber membrane module | Chemistry; Metallurgy | 71 | Expired |
| US6541627B1 | Cellulose dispersion | Chemistry; Metallurgy | 65 | Expired |
| US6787191B2 | Coating composition for the production of insulating thin films | Emerging Cross-Sectional Technologies | 63 | Expired |
| US6387564B1 | Non-aqueous secondary battery having an aggregation layer | Emerging Cross-Sectional Technologies | 61 | Expired |
| US6441661B1 | PLL circuit | Physics | 56 | Expired |
| US6664098B1 | Differentiation inhibitory agent | Human Necessities | 55 | Expired |
| US6500223B1 | Granular fertilizer coated with decomposable coating film and process for producing the same | Chemistry; Metallurgy | 52 | Expired |
| US6310138A | Hydrogenated block copolymer and polypropylene resin composition containing the same | Chemistry; Metallurgy | 51 | Expired |
| US6448331B1 | Alkoxysilane/organic polymer composition for thin insulating film production and use thereof | Emerging Cross-Sectional Technologies | 48 | Expired |
| US6537472B2 | Process for producing a cushioning article | Performing Operations; Transporting | 47 | Expired |
| US6768175B1 | Semiconductor substrate and its production method, semiconductor device comprising the same and its production method | Electricity | 40 | Expired |
| US6284370A | Polyester fiber with excellent processability and process for producing the same | Emerging Cross-Sectional Technologies | 40 | Expired |
| US6306498A | Fibers for electric flocking and electrically flocked article | Emerging Cross-Sectional Technologies | 38 | Expired |
| US6346899B1 | Analog current mode D/A converter using transconductors | Electricity | 38 | Expired |
| US7061010B2 | Organic semiconductor element | Electricity | 37 | Expired |
| USD461715S1 | Cushioning material for packaging | General | 34 | Expired |
| US7939101B2 | Cellulose powder | Emerging Cross-Sectional Technologies | 34 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.