Delavan Inc.
250Patents
219Active
250Granted
59Portfolio score
Filing activity: May 31, 1977 → Jul 18, 2023 · 29 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4659014A | Ultrasonic spray nozzle and method | Performing Operations; Transporting | 120 | Expired |
| US6755024B1 | Multiplex injector | Mechanical Engineering; Lighting; Heating | 88 | Expired |
| US6688534B2 | Air assist fuel nozzle | Mechanical Engineering; Lighting; Heating | 54 | Expired |
| US4128206A | Low drift flat spray nozzle and method | Performing Operations; Transporting | 43 | Expired |
| US5224333A | Simplex airblast fuel injection | Mechanical Engineering; Lighting; Heating | 43 | Expired |
| US5701732A | Method and apparatus for purging of gas turbine injectors | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US4570858A | Coated spray nozzle tips | Performing Operations; Transporting | 38 | Expired |
| US5152463A | Aspirating simplex spray nozzle | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US5263514A | Boom control valve | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4623277A | Self-tightening shaft coupler | Emerging Cross-Sectional Technologies | 35 | Expired |
| US9080772B2 | Continuous ignition | Mechanical Engineering; Lighting; Heating | 34 | Active |
| US8469059B1 | Fluid divider valves | Emerging Cross-Sectional Technologies | 34 | Active |
| US6539724B2 | Airblast fuel atomization system | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US7775052B2 | Active combustion control system for gas turbine engines | Emerging Cross-Sectional Technologies | 33 | Active |
| US7506510B2 | System and method for cooling a staged airblast fuel injector | Mechanical Engineering; Lighting; Heating | 31 | Active |
| US6630244B1 | Carbon resistant surface coating | Emerging Cross-Sectional Technologies | 31 | Expired |
| US8713944B2 | High temperature manifolds for gas turbine engines | Emerging Cross-Sectional Technologies | 30 | Active |
| US7779636B2 | Lean direct injection atomizer for gas turbine engines | Mechanical Engineering; Lighting; Heating | 29 | Active |
| US6863228B2 | Discrete jet atomizer | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US9567912B2 | Continuous ignition systems | Mechanical Engineering; Lighting; Heating | 26 | Active |
| US5732730A | Combined check valve and metering valve assembly | Emerging Cross-Sectional Technologies | 26 | Expired |
| US7926744B2 | Radially outward flowing air-blast fuel injector for gas turbine engine | Mechanical Engineering; Lighting; Heating | 21 | Active |
| US7547002B2 | Integrated fuel injection and mixing systems for fuel reformers and methods of using the same | Emerging Cross-Sectional Technologies | 21 | Expired |
| US7926282B2 | Pure air blast fuel injector | Emerging Cross-Sectional Technologies | 21 | Active |
| US8348180B2 | Conical swirler for fuel injectors and combustor domes and methods of manufacturing the same | Emerging Cross-Sectional Technologies | 20 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.