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Graftech Technology LLC

Graftech T

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
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