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Total Holdings
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Patent No.
Title
Status
Filing Date
Grant Date
Claims
Actions
US3775308A
Method for preparation of composite semipermeable membrane
Expired / Lapsed
1972-05-18
1973-11-27
0
Details
US3774771A
Reverse osmosis module
Expired / Lapsed
1971-12-09
1973-11-27
9
Details