| 1607708 | Separation of the constituents of gaseous mixtures | 2008-01-17 | ||
| 3094401 | Ethane side stripper | 1963-06-18 | ||
| 2640332 | Oxygen producing apparatus | 1953-06-02 | ||
| 2591658 | Process and apparatus for the separation of coke-oven gas | 1952-04-01 | ||
| 2317101 | Rectifying column | 1943-04-20 | ||
| 1804554 | Method and apparatus for fractionation of hydrocarbons | 1931-05-12 | ||
| 1804553 | Apparatus for fractionation of hydrocarbons | 1931-05-12 | ||
| 1460545 | Production of ethylene | 1923-07-03 | ||
| 0895192 | N/A | 1908-08-04 |