Graftech Technology LLC
Graftech TActive Patents
0
Total Holdings
5
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3853756A | Reverse pressure cleaning of supported semipermeable membra… | Expired / Lapsed | 1973-02-12 | 1974-12-10 | 10 | Details |
| US3794169A | Apparatus for dissociating collected solids from a filtrati… | Expired / Lapsed | 1972-05-15 | 1974-02-26 | 12 | Details |
| US3780147A | Method for making high flow porous reverse osmosis membrane… | Expired / Lapsed | 1970-12-09 | 1973-12-18 | 0 | Details |
| US3773181A | Sealing membranes in a reverse osmosis module | Expired / Lapsed | 1971-07-08 | 1973-11-20 | 15 | Details |
| US3721623A | Method of improving the salt rejection of semipermeable rev… | Expired / Lapsed | 1971-07-23 | 1973-03-20 | 7 | Details |