Rolls-Royce Corporation
1,875Patents
1,368Active
1,875Granted
61Portfolio score
Filing activity: Oct 22, 1962 → Jun 28, 2024 · 83 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5527632A | Hydrocarbon fuelled fuel cell power system | Emerging Cross-Sectional Technologies | 130 | Expired |
| US4064300A | Laminated materials | Emerging Cross-Sectional Technologies | 123 | Expired |
| US4298090A | Multi-layer acoustic linings | Mechanical Engineering; Lighting; Heating | 110 | Expired |
| US4548034A | Bypass gas turbine aeroengines and exhaust mixers therefor | Emerging Cross-Sectional Technologies | 108 | Expired |
| US4543784A | Exhaust flow mixers and nozzles | Mechanical Engineering; Lighting; Heating | 101 | Expired |
| US4577462A | Exhaust mixing in turbofan aeroengines | Emerging Cross-Sectional Technologies | 90 | Expired |
| US4380895A | Combustion chamber for a gas turbine engine having a variable rate diffuser upstream of air inlet means | Mechanical Engineering; Lighting; Heating | 88 | Expired |
| US4300474A | Apparatus for application of metallic coatings to metallic substrates | Chemistry; Metallurgy | 88 | Expired |
| US4445951A | Method of manufacturing composite materials | Emerging Cross-Sectional Technologies | 86 | Expired |
| US4271928A | Lubricant supply device | Emerging Cross-Sectional Technologies | 82 | Expired |
| US4562033A | Method of manufacturing articles from a composite material | Performing Operations; Transporting | 80 | Expired |
| US4326682A | Mounting for gas turbine powerplant | Mechanical Engineering; Lighting; Heating | 76 | Expired |
| US4327547A | Fuel injectors | Mechanical Engineering; Lighting; Heating | 76 | Expired |
| US4086022A | Gas turbine engine with improved compressor casing for permitting higher air flow and pressure ratios before surge | Emerging Cross-Sectional Technologies | 70 | Expired |
| US4785625A | Ducted fan gas turbine power plant mounting | Mechanical Engineering; Lighting; Heating | 67 | Expired |
| US4604031A | Hollow fluid cooled turbine blades | Emerging Cross-Sectional Technologies | 64 | Expired |
| US4202554A | Brush seals | Mechanical Engineering; Lighting; Heating | 63 | Expired |
| US4561257A | Gas turbine engine combustion apparatus | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4551064A | Turbine shroud and turbine shroud assembly | Mechanical Engineering; Lighting; Heating | 63 | Expired |
| US4559246A | Method of increasing the wettability of a surface by a molten metal | Chemistry; Metallurgy | 62 | Expired |
| US4531358A | Oil system for aircraft gas turbine engine | Emerging Cross-Sectional Technologies | 62 | Expired |
| US6355086B2 | Method and apparatus for making components by direct laser processing | Emerging Cross-Sectional Technologies | 61 | Expired |
| US4425755A | Gas turbine dual fuel burners | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US6698180B2 | Particle separator for a turbine engine | Emerging Cross-Sectional Technologies | 59 | Expired |
| US4084323A | Measuring apparatus | Physics | 58 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.