Linde GmbH
🏢 View company profile →1,227Patents
510Active
1,227Granted
55Portfolio score
Filing activity: Sep 18, 1972 → Apr 21, 2023 · 93 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4428372A | Process and apparatus for providing breathing gas | Performing Operations; Transporting | 98 | Expired |
| US7536873B2 | Process and device for cooling a gas by direct heat exchange with a cooling liquid | Mechanical Engineering; Lighting; Heating | 97 | Active |
| US5079103A | Fuel cells with hydrogen recycle | Emerging Cross-Sectional Technologies | 93 | Expired |
| US5316448A | Process and a device for increasing the efficiency of compression devices | Mechanical Engineering; Lighting; Heating | 84 | Expired |
| US4361478A | Method of preheating hydrocarbons for thermal cracking | Mechanical Engineering; Lighting; Heating | 84 | Expired |
| US7516626B2 | Apparatus for the low-temperature separation of a gas mixture, in particular air | Emerging Cross-Sectional Technologies | 80 | Active |
| US4107937A | Method of and apparatus for the deep freezing of biological substances | Mechanical Engineering; Lighting; Heating | 76 | Expired |
| US7143967B2 | Method and system for cold gas spraying | Chemistry; Metallurgy | 76 | Expired |
| US6652241B1 | Method and compressor module for compressing a gas stream | Mechanical Engineering; Lighting; Heating | 70 | Expired |
| US4324565A | Removal of lubricant mists and lubricant vapors from a gaseous stream | Performing Operations; Transporting | 65 | Expired |
| US7744676B2 | TSA process | Performing Operations; Transporting | 59 | Active |
| US4617854A | Multiple consumer hydraulic mechanisms | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US4415454A | Nitrification treatment of wastewater | Emerging Cross-Sectional Technologies | 57 | Expired |
| US4019314A | High pressure gasification of coal using nitrogen dilution of waste gas from steam generator | Chemistry; Metallurgy | 57 | Expired |
| US4145883A | Hydrostatic transmission for tractors and the like | Mechanical Engineering; Lighting; Heating | 54 | Expired |
| US4566971A | Process and apparatus for the biological purification of wastewater | Emerging Cross-Sectional Technologies | 52 | Expired |
| US8269055B2 | Method for deactivation of an organometallic catalyst and reactor system therefor | Chemistry; Metallurgy | 51 | Active |
| US5817226A | Process and device for steam-cracking a light and a heavy hydrocarbon feedstock | Chemistry; Metallurgy | 51 | Expired |
| US5660807A | Process for the removal of HCN from gas mixtures | Chemistry; Metallurgy | 50 | Expired |
| US5759209A | Cleaning with liquid gases | Chemistry; Metallurgy | 49 | Expired |
| US4252508A | Pump unit | Mechanical Engineering; Lighting; Heating | 49 | Expired |
| US5175061A | High-temperature fuel cells with oxygen-enriched gas | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4294590A | Removal of undesired gaseous components from hot waste gases | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4935044A | Purification of crude argon | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4460470A | Process and apparatus for the biological purification of phosphate-containing wastewater | Emerging Cross-Sectional Technologies | 47 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.