Sumitomo Cement Co., Ltd.
37Patents
0Active
37Granted
40Portfolio score
Filing activity: Jul 16, 1979 → Jul 18, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5216541A | Optical associative identifier with real time joint transform correlator | Physics | 107 | Expired |
| US4654314A | Porous ceramic material and processes for preparing same | Chemistry; Metallurgy | 97 | Expired |
| US5253991A | Apparatus for producing spheroidal inorganic particulate material | Emerging Cross-Sectional Technologies | 79 | Expired |
| US5619596A | Method and apparatus for optical pattern recognition | Physics | 59 | Expired |
| US4963145A | Porous ceramic material and processes for preparing same | Chemistry; Metallurgy | 53 | Expired |
| US4295823A | Apparatus for continuously producing a cement clinker | Emerging Cross-Sectional Technologies | 45 | Expired |
| US5059388A | Process for manufacturing sintered bodies | Chemistry; Metallurgy | 34 | Expired |
| US5211661A | Artificial living body composite material | Human Necessities | 26 | Expired |
| US5239595A | Optical method for identifying or recognizing a pattern to be identified | Physics | 25 | Expired |
| US5600485A | Optical pattern recognition system method of ferroelectric liquid crystal spatial light modulator | Physics | 24 | Expired |
| US5526448A | Optical waveguide modulator having a reduced D.C. drift | Physics | 23 | Expired |
| US5248486A | Device, agent and process for medical waste sterilization | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5094985A | Sintered silicon carbide body with high thermal conductivity and process of producing the same | Chemistry; Metallurgy | 18 | Expired |
| US5446339A | Cathode ray tube having antistatic/anti-reflection film-covered transparent material laminated body | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5359690A | Cutting method and apparatus for removing a secondary coating layer from a jacketed optical fiber | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5093039A | Highly pure sintered carbide with high electric conductivity and process of producing the same | Electricity | 15 | Expired |
| US5214345A | Ultraviolet ray-shielding agent and tube | Electricity | 14 | Expired |
| US4571124A | Method of forming cast-in-place concrete pile | Fixed Constructions | 12 | Expired |
| US4952454A | Bonding composition for ceramics comprising metal oxide melt and method for bonding ceramics | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5173117A | Additives for roller compacted concrete pavement | Chemistry; Metallurgy | 11 | Expired |
| US4996177A | Sintered alumina article with high flexural strength and process for producing same | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5051650A | Ultraviolet-suppressed light source, coating agent used in the same, and method for manufacturing the same | Chemistry; Metallurgy | 11 | Expired |
| US5681885A | Coating material for antistatic high refractive index film formation | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4276020A | Method for heating powder material and apparatus for carrying out said method | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4483487A | Vertical roller mill | Performing Operations; Transporting | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.