Patent Explorer
Browse, filter, and analyze 7 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| GB830922A | Gas diffusion electrodes and a process for their production | Ruhrchemie AG | Expired / Lapsed | 1956-03-26 | — | 1976-03-26 | 0.0 yrs | 0 | |
| US2947797A | Direct production of electrical energy from combustible fuel gases | Ruhrchemie AG | Expired / Lapsed | 1957-05-14 | 1960-08-02 | 1977-05-14 | 0.0 yrs | 0 | |
| US2889892A | Lock for the discharge of solids separated from gaseous media by means of cyclones | Ruhrchemie AG | Expired / Lapsed | 1957-07-02 | 1959-06-09 | 1977-07-02 | 0.0 yrs | 0 | |
| US2889259A | Process for the chloro-sulfonation of polyethylene | Ruhrchemie AG | Expired / Lapsed | 1956-02-08 | 1959-06-02 | 1976-02-08 | 0.0 yrs | 2 | |
| US2884783A | Photoelectric apparatus for measuring and remote reading of liquid levels | Ruhrchemie AG | Expired / Lapsed | 1954-01-26 | 1959-05-05 | 1974-01-26 | 0.0 yrs | 0 | |
| US2860175A | Homeoporous gas-diffusion electrode for galvanic cells | Ruhrchemie AG | Expired / Lapsed | 1956-09-05 | 1958-11-11 | 1976-09-05 | 0.0 yrs | 1 | |
| US2830109A | Fuel cell | Ruhrchemie AG | Expired / Lapsed | 1952-05-29 | 1958-04-08 | 1972-05-29 | 0.0 yrs | 2 |