UNITED TECHNOLOGIES CORPORATION
10,721Patents
5,683Active
10,721Granted
58Portfolio score
Filing activity: Sep 30, 1966 → Jul 20, 2020 · 1,006 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7976213B2 | Arrangement for controlling fluid jets injected into a fluid stream | Emerging Cross-Sectional Technologies | 996 | Active |
| US6223616A | Star gear system with lubrication circuit and lubrication method therefor | Emerging Cross-Sectional Technologies | 606 | Expired |
| US5433674A | Coupling system for a planetary gear train | Emerging Cross-Sectional Technologies | 513 | Expired |
| US5778659A | Variable area fan exhaust nozzle having mechanically separate sleeve and thrust reverser actuation systems | Mechanical Engineering; Lighting; Heating | 464 | Expired |
| US5524847A | Nacelle and mounting arrangement for an aircraft engine | Emerging Cross-Sectional Technologies | 428 | Expired |
| US7021042B2 | Geartrain coupling for a turbofan engine | Emerging Cross-Sectional Technologies | 411 | Expired |
| US5915917A | Compressor stall and surge control using airflow asymmetry measurement | Mechanical Engineering; Lighting; Heating | 402 | Expired |
| US7591754B2 | Epicyclic gear train integral sun gear coupling design | Emerging Cross-Sectional Technologies | 400 | Active |
| US5466198A | Geared drive system for a bladed propulsor | Emerging Cross-Sectional Technologies | 393 | Expired |
| US6318070A | Variable area nozzle for gas turbine engines driven by shape memory alloy actuators | Emerging Cross-Sectional Technologies | 388 | Expired |
| US7926260B2 | Flexible shaft for gas turbine engine | Emerging Cross-Sectional Technologies | 383 | Active |
| US8205432B2 | Epicyclic gear train for turbo fan engine | Mechanical Engineering; Lighting; Heating | 380 | Active |
| US6315815A | Membrane based fuel deoxygenator | Mechanical Engineering; Lighting; Heating | 375 | Expired |
| US7824305B2 | Integral sun gear coupling | Emerging Cross-Sectional Technologies | 352 | Active |
| US4478551A | Turbine exhaust case design | Emerging Cross-Sectional Technologies | 324 | Expired |
| US6709492B1 | Planar membrane deoxygenator | Emerging Cross-Sectional Technologies | 316 | Expired |
| US5102379A | Journal bearing arrangement | Mechanical Engineering; Lighting; Heating | 316 | Expired |
| US4696156A | Fuel and oil heat management system for a gas turbine engine | Emerging Cross-Sectional Technologies | 298 | Expired |
| US3932058A | Control system for variable pitch fan propulsor | Mechanical Engineering; Lighting; Heating | 268 | Expired |
| US7662059B2 | Lubrication of windmilling journal bearings | Mechanical Engineering; Lighting; Heating | 249 | Active |
| US5093794A | Job scheduling system | Physics | 249 | Expired |
| US4323756A | Method for fabricating articles by sequential layer deposition | Emerging Cross-Sectional Technologies | 241 | Expired |
| US6387456B1 | Silicon based substrate with environmental/thermal barrier layer | Chemistry; Metallurgy | 240 | Expired |
| US3935558A | Surge detector for turbine engines | Mechanical Engineering; Lighting; Heating | 238 | Expired |
| US5007705A | Variable optical fiber Bragg filter arrangement | Physics | 224 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.