Stone & Webster Engineering Corp.
122Patents
0Active
122Granted
43Portfolio score
Filing activity: May 23, 1972 → Feb 22, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3959420A | Direct quench apparatus | Emerging Cross-Sectional Technologies | 147 | Expired |
| US5523502A | Flexible light olefins production | Chemistry; Metallurgy | 91 | Expired |
| US4094148A | Thermal storage with molten salt for peaking power | Emerging Cross-Sectional Technologies | 84 | Expired |
| US4904455A | Production of synthesis gas using convective reforming | Emerging Cross-Sectional Technologies | 76 | Expired |
| US5981818A | Integrated cracking and olefins derivative process utilizing dilute olefins | Emerging Cross-Sectional Technologies | 68 | Expired |
| US5414170A | Mixed phase front end C.sub.2 acetylene hydrogenation | Chemistry; Metallurgy | 66 | Expired |
| US4141825A | Desalination process system and by-product recovery | Emerging Cross-Sectional Technologies | 65 | Expired |
| US5320741A | Combination process for the pretreatment and hydroconversion of heavy residual oils | Chemistry; Metallurgy | 64 | Expired |
| US4083781A | Desalination process system and by-product recovery | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4356151A | Solids quench boiler | Chemistry; Metallurgy | 49 | Expired |
| US4264432A | Pre-heat vaporization system | Chemistry; Metallurgy | 48 | Expired |
| US5280756A | NO.sub.x Emissions advisor and automation system | Mechanical Engineering; Lighting; Heating | 47 | Expired |
| US4615795A | Integrated heavy oil pyrolysis process | Chemistry; Metallurgy | 47 | Expired |
| US4814067A | Particulate solids cracking apparatus and process | Chemistry; Metallurgy | 45 | Expired |
| US4765948A | Coolant circulation system for a liquid metal nuclear reactor | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5181482A | Sootblowing advisor and automation system | Physics | 41 | Expired |
| US5254788A | Process for the production of olefins from light paraffins | Chemistry; Metallurgy | 41 | Expired |
| US4732740A | Integrated heavy oil pyrolysis process | Chemistry; Metallurgy | 40 | Expired |
| US4552644A | Duocracking process for the production of olefins from both heavy and light hydrocarbons | Chemistry; Metallurgy | 40 | Expired |
| US5006131A | Apparatus for production of synthesis gas using convective reforming | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5730859A | Process for catalytically cracking paraffin rich feedstocks comprising high and low concarbon components | Chemistry; Metallurgy | 38 | Expired |
| US4300998A | Pre-heat vaporization system | Chemistry; Metallurgy | 38 | Expired |
| US5035732A | Cryogenic separation of gaseous mixtures | Mechanical Engineering; Lighting; Heating | 36 | Expired |
| US4986956A | Passive nuclear power plant containment system | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4203742A | Process for the recovery of ethane and heavier hydrocarbon components from methane-rich gases | Mechanical Engineering; Lighting; Heating | 34 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.